Year 2009

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ALLELOPATHIC EFFECT OF Brassica BIOMASS TO CONTROL WEEDS AND YIELD OF WHEAT
(DEPARTMENT OF AGRONOMY, 2009) MORSHED, MD. MONZUR
The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from October 2007 to February 2008 to study the al]elopathic effect of Brassica biomass to control weeds and yield of wheat. The experiment consisted of two factors of which Factor A: 3 kinds of Brass/ca species viz. Si: Brass/ca campesiris. S 2: Brass/ca juncea and S 3 : Brc:ssica napus and Factor B: incorporation methods of Brass/ca biornass (5 levels) like: B 0: Control (no bioniass application); B 1 : Spreading above the ground; B 2 : Mixed with soil; B3 : Spreading in line and B 4: 50% spreading + 50% mixed with soil. At 30 days after sowing (DAS), the maximum numbers of weeds (25.53 n12 ) were found in the plot treated with Brass/ca funcea which was 44. 81°/a higher than Brass/ca campesiris. At 50 DAS. Bras's/ca juncea also showed the highest weed population (20.20 m 2). However, Brass/ca campes Iris resulted with the best effect on weed control showing the least number of weed population (14.07 rn 2 ). At 30 DAS, the lowest weed population (15.33 m 2 ) was seen by 133 while the highest (26,89 m 2 ) was found in the B2 . At 50 DAS, the highest (20.89 1112) weed population was found by B 2 whereas. B4 showed the lowest (13.11 m) population. S 1 B2 showed the lowest density of weeds (8.67n12 ) at 50 DAS which was significantly lower than S 2B0 (37.33n12 ) and S3B2 (40.00m 2 ) at 30 and 50 DAS respectively. Among the Brass/ca species, S 2 produced the highest grain yield (3.52 t ha d ) while the lowest (3.32 t ha d ) was obtained from S. The highest grain yield (3.54 t ha d ) was recorded from B 0 while the lowest (3.32 t ha ')was recorded from B2 . The S2 B1 had the highest grain yield (3.83 t ha") whereas the lowest (3.06 t ha") was recorded from S 3B1 . It is appeared from the above results that Brass/ca canzpeslris and B4 incorporation method was mostly effective in controlling weed. But yield was not affected by both species and incorporation methods
EFFECT OF FORMS OF NITROGENOUS FERTILIZER AND NUMBER OF SEEDLING PER HILL ON THE YIELD OF BORO RICE CV. BRRI dhan 29
(DEPARTMENT OF AGRONOMY, 2009) Reza, Masud
An experiment was carried out on BRRI dhan 29 at the experimental field of Sher-c- l3angla Agricultural University. Dhaka during November'07 to April'08 to evaluate the elIèct of three forms of N-fertilizer viz. pilled urea. urea super granules (USG) and foliar spray of urea and four levels of seedling/hill viz. 1. 2, 4 and 6. Forms of N- fertilizer were assigned in main plot and number of seedling/hill in the sub plots in a split-plot design with 3 replications .. EtTect of forms of nitrogen fertilizer and number of seedling/hill was signilicant in respect of all the plant and yield attributing characters like plant height. effective tiller/hill, ineffective tiller/hill. grain/panicle. sterile grain/paniele and thousand seed weight. Urea super granules (USG) have significantly highest grain yield (6.4 t/ha) lowest grain (5.1 c/ha) was found in the where as lowest straw yield (5.8 tAm) and bmw application of urca.Signilicantly highest grain yield (6.6 t/ha) was obtained from single seedling/hill followed by two seedlings/hill (6.4 t/ha). The highest straw yield (7.5 c/ha) was obtained from six seedlings/hill and the lowest (6.7 c/ha) was found from single seedling/hill. The interaction effect of forms of N-fertilizer and number of seedling/hill differed significantly for all the yield attributes, although the highest grain yield (7.0 c/ha) was produced from the treatment combination of Urea super granule (USG) seedling/hill followed by urea super granules x urea x single seedling/hill (6.83 c/ha) interactions. vi x 2 seedling/hill (6.93 c/ha) and prilled
EFFECT OF INTERCROPPING CHICKPEA WITH SUNFLOWER UNDER DIFFERENT ROW AND SPACING ARRANGEMENTS
(DEPARTMENT OF AGRONOMY, 2009) NASRIN, SHAMA
The experiment was conducted to find out the effect of intercropping chickpea with sunflower under different row and spacing arrangements at the experimental field of Agronomy Department of Sher-e-Bangla Agricultural University, Dhaka- 1207, during the period from November 2008 to March 2009. Seeds of sunflower variety DS-1 (Kironi) and Chickpea variety BARI-Chola-5 used as a test crop for the study. The experiment consisted of nine row arrangement combinations of sunflower and chickpea plus sole treatment of both the crops. The row arrangement of sunflower were recommended as 50 cm apart, paired rows 30 cm apart followed by 70 cm gap; and paired rows 30 cm apart followed by 100 cm gap. Within these were three row arrangements, 1-4 rows of chickpea at different spacing which altogether made nine treatment combinations. Results revealed that soil moisture, light intensity, growth parameters, yield attributes and yield, land equivalent ratio, soil pH and N, P. K had significant differences. The maximum soil moisture (30.11-35.20%) was recorded when two rows of chickpea were sown 40 cm apart in 70 cm gap of sunflower paired rows. svhile the minimum (25.10-27.60%) in the sole sunflower plots. The highest LER (1.76) was recorded from T 5 and the lowest LER from the sole crop both sunflower and chickpea. The highest equivalent yield (BY) of sunflower (3.81 t haj was recorded from T 5 and the lowest (2.09 t hi') from the sole crop of chickpea. The highest EY of chickpea (4.39 t haj was recorded from T5 and the lowest (2.57 t hi') from the sole crop of sunflower. The highest combined yield of sunflower and chickpea (4.08 t hi') was recorded from T 5 and the lowest (2.23 t hi') from the sole crop of sunflower. The highest benefit cost ratio (3.52) was recorded from 'f s and the lowest (1.49) from the sole crop of chickpea.
EFFECT OF IRRIGATION ANID VARIETY ON GROWTH AND YIELD OF LENTIL
(DEPARTMENT OF AGRONOMY, 2009) A. H. M. RAYHAN
A field experiment was conducted at Sher-e-Bangla Agricultural University farm, Dhaka during the period from November 2008 to February 2009 to study the effect of irrigation and variety on growth and yield of lentil. The experiment was consisted of two treatment factors; factor A: four irrigation levels (!= no irrigation, 11= irrigation at 25 DAS, 12= irrigation at 50 DAS and 13= Irrigation at both 25 and 50 DAS) and factor B: four lentil varieties ('i= BARI Masur-3. V2= BARI Masur-4, V3 = BARI Masur-5 and V 4 = BARI Masur-6). The experiment was laid-out in split plot design with three replications assigning irrigation level in the main-plot and variety in the sub-plot Results showed that irrigation level, variety and their interaction exerted significant influence on plant height and plant dry matter at different days after sowing (DAS), on pods plani', seeds per pod', 1000-seed weight, seed yield, stover yield, biological yield and harvest index of lentil. Increasing irrigation level increased seed yield. BARI Masur-6 gave the highest seed yield followed by BARI Masur-5, BARI Masur-4 and BARI Masur-3. Irrigation at both 25 and 50 DAS in BARI Masur-6 showed the highest seed yield. In all the cases, increasing seed yield were obtained by increasing the values of the said parameters.
EFFECT OF IRROGATION ON THE GROWTH AND YIELD OF DIFFERNT WHEAT VARIETIES
(DEPARTMENT OF AGRONOMY, 2009) BHATTACHARJE, SHUBHA ANKUR
An experiment Was conducted at the experimental field of Sher-c-l3angla Agricultural University. i)haka during the period from December 2007 to March 2008 to s(Lidy the effect of irrigation on the growth and yield of dillerelit wheat varieties. i he experiment comprised two thetors; Irrigation: 3 levels (1 ) : Control. l: One irrigation a crown root initiation stage. 1: Two irrigation at Clown root initial jot) stage and grain Idling stage) and Variety: 4 LV,: l3ijoy, '12: l'rodip. V: Suti and '14: Results showed that the effect of irngatiOl) on difibrent plant parameters and yield v/is sigifi ticant. Shzn ificalilly (Lie loiuzest plant (79.99 cm), highest ti I icr number (4.89 plant"), spike Length (I 1.30 lii ,V1064). cm), grain yield (2.54 t ha") and straw yield (3.80 t ha'5 were recorded from I?. \Vlicreas, significantly the lowest values of these pzlt'a;))etCrS w:re obtained frotil I t ,. Genotypes also showed signi licatit variations in the plant eanl ly the highest plant height (80.03 cm). tiller tininiJer parameters swthed. Sign1 fl (4.87 plant''), spike length (10.00 cm), grain yield (2.50 t ha'') and straw yield (3.56 were obtained From the genotype 'a lues were obtained from V. I '12 whereas. the corresponding the lowest . Signi ticant interaction eftect of irrigation and genotype was also obsen'cd on di Herein plant ixIraliteters. [he longest plant (83.79 cm). the maxitflulfl number of total tillers (5.27 plant'), grain yield (2,75 t ha ) and straw yield (4.36 t ha' ) was recorded from the treatment combination of NV1, while tile corresponding lowest values were obtained hunt lu\$.
EFFECT OF STORAGE DURATIONS OF UPROOTED RICE SEEDLINGS AT DIFFERENT ACES ON THE PERFORMANCE OF BRRI dhau3l AND BRRI dhan34
(DEPARTMENT OF AGRONOMY, 2009) JALAL, MD. JANNATUL
The field experiment was conducted at the Agronomy Field Laboratory. Sher-el3angia Agricultural University (SAU). Sher-e-Bangla Nagar. Dhaka during the period from Jwie, 2008 to December. 2008 to study the effect of storage durations of uprooted rice seedlings at different ages on the performance of BRRI dhan3 and I3RRldhan34 tinder Modhupur tract (AEZ 28). The experiment comprised three different factors viz. A. Variety (2): BRRI dhan3l (V 1 ) and BRRI dhan34 (A2) and C. Storage durations (4): 0. 2, 4 and 6 days alter uprooting (D 0, D2, D 4 and D6 (V2 ). B. Seedling age (2): 30 days old seedlings 0 ,) and 40 days old seedlings respectively). The experiment was laid out in Randomized Complete Block Design (Factorial) with three replications. Results indicated that BRRI dhan3l performed better than BRRI dhan34. BRRI dhan3l produced significantly higher number of total tillers hill', effective tillers hill 1 . weight of 1000 grains, grain yield (4.41 t hi'). straw yield and biological yield and harvest index..he results also revealed that 30 days old seedlings showed the better performance than 40 days old seedlings. In respect of the longer panicle (26.64 cm) and the higher number of total grains panicle 1 (160.26), number of filled grains panicl&' (134.84), weight of 1000-grain (20.22 g) and grain yield (4.38 t hi'). Among the storage durations of uprooted rice seedlings, 0 days storage durations showed best performance. Showing higher plant height (126.66 cm), number of total grains panicl&' (158.86), number of filled grains panicle4 (138.54), 1000-grain weight (20.62 g), grain yield (3.98 t hi'), straw yield (6.68 t ha'). biological yield (10.66 t ha 1 ) and harvest index (37.33%) were found from 0 days storage duration. It was coiieluded that BRRI dhan3l with 30 days old seedlings stored for up to 4 days and 40 days old seedlings stored fbr 2 days showed no yield loss. Seedlings of BRRI dhan34 variety could be stored for 2 days of both aged seedlings.
EFFECT OF VARIETY AND SOWING DATE ON GROWTH AND YIELD OF LENTIL (Lens culinaris)
(DEPARTMENT OF AGRONOMY, 2009) RANA, MD. ABUL HASNATH
A field experiment was conducted at the Shcr-c-I3angla Agricultural University farm. Dhaka. during October 2008 to April 2009 to study the effect of variety and sowing date on growth and yield of lentil. The study included four varieties, viz.. BARI Masur-3. BARI Masur-4. BARI Masur-5 and BARI Masur-6. and Ibur sowing dates. vi ... 06 November. 16 November, 26 November and 06 December. The experiment was laid-out in Randomized Complete Block Design. The growth parameters were studied at 20. 30, 40, 50. 60 days atier sowing (DAS) and at harvest. Results showed that variety and sowing date had signilicant influence on all the plant characters studied. the plant height, number of branches per plant. dry matter content in plant at all the growth stages, seed and stover yield were found highest in BARI Masur-6 and lowest in BARI Mastir-3: whereas. these parameters were found highest and lowest on sowing 26 November and 06 December. respectively. Sowing BARI Masur-6 on 26 November gave the highest seed (2.60 t ha'') and stover (3.42 t ha'') yield that similar to the same variety sowing on o6 November and 16 November; whereas, sowing BARI Masur-3 on 06 December gave the lowesi seed yield. Results suggested that sowing BARI Masur-6 on 06 to 26 November was desirable for higher seed yield under AFZ 28 conditions.
GROWTH AND YIELD OF COMPOSITE AND HYBRID MAIZE AS AFFECTED BY TIME OF IRRIGATION
(DEPARTMENT OF AGRONOMY, 2009) HALDER, KEYA
The experiment was conducted at the Farm of Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Ohaka, Bangladesh during the period from October 2009 to March 2010 to study the growth and yield of composite and hybrid maize as aflècted by time of irrigation. The experiment comprised as two factors. Factor A: Maize variety - 2 levels: V 1 : BARI bhutta-7 and V 2 : BARE hybrid bhutta-5. Factor B: Time of irrigation - 8 levels, I: No irrigation: I: One irrigation at 35 DAS; 12: One irrigation at tasseling; 1 3 : One irrigation at silking; 1 4 : Two irrigations at 35 DAS and tasseling; I c : Two irrigations at 35 DAS and silking; L: Two irrigations at tasseling and silking and 1 7 : Three irrigations at 35 DAS, tasseling and silking. The experiment was laid out in split-plot design with three replications. Data on different growth parameter, yield attributes and yield were recorded and analyzed. At 40, 60, 80 DAS and at harvest the tallest plant (23.54 cm, 57.98 cm, 106.88 cm and 170.68 cm, respectively) was recorded from V 2 . while the shortest plant (21.46 cm, 55.58 cm, 99.93 cm and 161.56 cm, respectively) from V 1 . The highest grain yield (7.48 tJha) was found from V 2 . while the lowest (3.96 t/ha) from V 1 . At 40, 60, 80 DAS and at harvest, the tallest plant (25.09 cm, 61.46 cm, 111.51 cm and 175.45 cm, respectively) was observed from 1 7 , again the shortest ([8.64 cm, 50.46 cm, 90.56 cm and 147.07 cm, respectively) from The highest grain yield (6.31 tiha) was obtained from b and the lowest (4.06 tJha) from 10. At 40, 60, 80 DAS and at harvest, the tallest plant (26.53 cm. 63.04 cm. 118.70 cm and 187.10 cm. respectively) was observed from V217 , again the shortest (14.77 cm, 48.27 cm, 78.19cm and 132.31 cm, respectively) from V 110 . The highest cob length (19.63 cm) was found from V 217, while the lowest (11.40 cm) from V 1!0 . The highest cob diameter (3.74 cm) was observed from V 2!7. again the lowest (2.38 cm) from V 1 10 . The highest 1000 grain weight (423.93 g) was given by V 213 . while the lowest (235.23 g) was found in V 110. The highest grain yield (8.48 tTha) was recorded from V 2!7 that similar to V 2!6 (8.04 tiha) and the lowest (2.55 tlha) from V 1 1 0.
GROWTH AND YIELD OF MAIZE AS AFFECTED BY SEED SIZE AND DEPTH OF SOWING
(DEPARTMENT OF AGRONOMY, 2009) HOSSAN, MD. JAKIR
An experiment was conducted at the experimental farm of Shcr-e-Bangla Agricultural University (SAU). Dhaka. during December 2007 to May 2008 to study the influence of varying seed size and sowing depth on growth and yield of maize. The experiment consisted of three seed sizes (Si = <7 mm, S, =>7 mm'9 mm and S3= >9 mm) and lour sowing depths (D,= 2 cm D 2 =4 cm. D1=6 cm. and D =8 cm).The experiment was laid out in randomized complete Hock design (RCBD) with three replications. The experiment was conducted both in the laboratory and in the fleki. Results from the experiment in pots in the laboratory showed that the highest germination percentage (91.67) and seed vigor index (28.87) were found in S03 treatment. At 15 DA.S the highest shoot length (25.11 cm), root length (24.67 cm), fresh weight (1.47 g) and dry weight (0.25 g) of shoot and fresh weight (0.61 g) and dry weight (0.26 g) of root were obtained from Sd)3 treatment. Results from field experiment at 35. 55, 75, 95, 115 DAS and at harvest showed that the tallest plant height (37.4. 77.84. 134.0, 250.2, 251.7 and 248.6 cm), maximum number of leaf per plant (8.17. 10.17. 13.58, 20.83. 20.5. 19.57), dry weight of leaf (0.59, 4.97. .31.3. 52.7, 58.15 and 5.77 g ), dry weight of stem (0.34. 3.20. 22.62, 83.16. 109.8 and 104.8 g). dry weight of root (0.49. 3.01. 14.28, 29.36. 33.96 and 35.34 g) were found in S;D treatment respectively. The highest percentage of fertile cob (78.7) at harvest, number of cobs plant' (2.75), cob length (18.11cm), diameter of cob (13.69 cm) and number of seeds cob*' (531.1), 1000 seed weight (307.60 g) were obtained from S3D3 treatment. The seed size and sowing depth had a sigiuf cant effect on grain yield. The highest grain yield (7.38 t ha 5 shown by the treatment D. The highest grain yield (7.561 ha S ') was obtained from Si. The difference of grain yield among the treatments was significant due to interaction of seed size and sowing depth. The highest grain yield (8.07 t ha') was found in S 3 D3 treatment.
GROWTH AND YIELD OF WHEAT AS INFLUENCED BY TIME OF IRRIGATION AND SPLIT APPLICATION OF NITROGEN
(DEPARTMENT OF AGRONOMY, 2009) HOSSAIN, MOSAREF
The experiment was conducted at the experimental site of Sher-e-Bangla Agricultural University (SAU) during the period from December, 2007 to March, 2008 to study the growth and yield of wheat as influenced by time of irrigation and split application of nitrogen . The treatments comprised (A) three irrigation levels (i) no irrigation, (ii) one irrigation given at crown root initiation stage, (iii) two irrigations, one at crown root initiation stage and another at panicle initiation stage and (B) four split application of nitrogen viz. (i) no nitrogen application, (ii) one basal application of nitrogen at the time of sowing, (iii) two equal split- one at basal and another at 30 DAS, (iv) three equal split- one at basal, one at 30 DAS and the other at 60 DAS and (C) their combination effect. It was observed that the highest plant height, number of tillers/plant, leaf area index (LAI), fresh weight plant , dry weight plant -1 , spike length, number of spikelets spike -1 -1 , number of grains spike , 1000 seed weight, total grain yield, straw yield and harvest index were obtained with the application of irrigation and nitrogen. In case of the combined effect on irrigation and split application of nitrogen, the tallest plant (96.37 cm), highest number of tillers/plant (4.50), highest leaf area index (2.71), highest fresh weight (66.97g) and dry weight (36.56g) plant -1 , longest spike length (17.35 cm), highest number of spikelets spike -1 (60.00) and highest number of grains spike -1 1 (39.33), highest 1000 seed weight (48.50g), total grain yield (4.30 t ha ), straw yield (5.82 t ha -1 ) and harvest index (42.49%) were obtained with the combination of two irrigations with three split application of nitrogen. So, it may be concluded that the treatment combination of two irrigations at crown root initiation and panicle initiation with three splits of nitrogen one each at basal, 30 DAS and 60 DAS considered as the best treatment compared to all other treatments and it can be recommended for further trial.
GROWTH AND YIELD PERFORMANCE OF CRASSPEA UNDER DIFFERENT METHODS OF SOWING AND PRE-EMERGENCE IRRIGATION
(DEPARTMENT OF AGRONOMY, 2009) AHMED, BULBUL
The experiment was conducted in the Fann ol' Sher-e-Bangla Agricultural University. Dhaka. Bangladesh during the period from December. 2007 to March 2008 to study the growth and yield performance of grasspea under different methods ci sowing and prc-emergenee irrigation. The variety BAR! Khesari-2 was used as the test crop. The treatments of the experiment were T,: Broadcast sowing without irrigation: 12: Furrow sowing without irrigation: T: Furrow sowing with furrow irrigation; T 4: Broadcast sowing with primed seeds: 'I' j : Furrow sowing with primed seeds: T 6 : Broadcast sowing with sprinkler irrigation at evening; 1 7 : Broadcast sowing with sprinkler irrigation at evening and morning: 'FR: Furrow sowing with sprinkler irrigation at morning and i's : Broadcast sowing with post sowing flood irrigation. Parameters were studied at 15. 25. 35. 45 and 55 days atler sowing. The highest seedling emergence (4.80. 19.65. 26.20. 54.20 and 71.50) was recorded in T 7 treatment whereas the lowest (2.40. 5.10. 18.20. 44.60 and 45.23) in T1 treatment. The tallest plant (15.11 cm. 34.91 cm. 42.79 cm. 59.41 cm and 71.92) at 15. 25, 35. 45 and 55 DAS was recorded in T 7 treatment and the shortest(l0.94 cm. 25.76 cm. 31.07 cm. 46.55 cm and 56.98 cm) in '1' treatment. The highest number of leaves, number of branches, number of flowers and dr v matter were recorded from T7 treatment and whereas, the lowest in T 1 treatment. 1'he highest pod number, pod length. number of seeds pod', weight of 1000 seeds were recorded from T7 treatment and the lowest in T 1 treatment. The highest seed yield (1.75 t ha 4 ) and stover yield (3.91 t ha 4 ) were recorded in T 7 treatment and the lowest seed yield (1.29 t hi') and stover yield (339 t hai in "I' s treatment.
INFLUENCE OF NITROGEN AND PLANT POPULATION ON THE GROWTH AND YIELD OF SESAME
(DEPARTMENT OF AGRONOMY, 2009) HOSSAIN, MD. SARWAR
An experiment was conducted to assess the influence of four nitrogen levels and plant population on the growth and yield attributes of sesame at the agronomy research field of Sher-e-Bangla Agricultural University, Dhaka during the period from March to July. 2009. The experiment was conducted in randomized complete block design comprising three replications. The treatments included four levels of nitrogen viz.0, 30, 45 and 60 kg ha' and four levels plant population density viz.166666, 222222, 333333 and 666666 plants hi'. Results indicated that (different levels of N fertilizer and plant population had significant effects on yield and yield attributes of sesame. lThe addition of N levels resulted in the increasing of yield and yield attributes of sesame and the highest plant height (115.50 cm), branches plant' (4.57), capsules branches-' (17.36), total capsules planit (80.32), number of effective capsules plant' (76.47), capsule length (2.38 cm), seeds capsule1 (70.13), filled seeds capsuled (68.31). 1000 seeds weight (3.46 g). seed yield (1.50 t hi') and harvest index (24.45%) were obtained from 60 kg N ha On the other hand, increasing of plant population resulted increases in yield and yield attributes of sesame like plant height, unfilled seeds capsule1, seed yield, stover yield and harvest index. The highest seed yield of sesame plant (1.50 t hi1 ), stover yield (4.64 t hi') and harvest index (24.45%) were found from 666666 plants hi' plant population. The combined effect of nitrogen levels and plant population had a significant effect on the plant parameters of sesame. The highest branches plant' (5.12). capsules branch1 (19.07), total capsules plant' (97.55), number of effective capsules plant' (93.75), capsule length (2.79 cm), seeds capsule1 (84.63), filled seeds capsul&t (82.88), 1000 seeds weight (3.65 g) were recorded from 166666 plants hi' in combination with 60 kg N hi' applied but highest plant height (120.00 cm), seed yield (1.76 t hi'). stover yield (5.07 t hi') and harvest index (25.73%) were obtained from the 666666 plants hi' in combination with 60 kg N hi' applied.
INFLUENCE OF NITROGEN AND PLANT SPACING ON GROWTH AND YIELD OF BORO RICE
(DEPARTMENT OF AGRONOMY, 2009) UDDIN, MOHAMMAD AMAJ
An experiment was conducted at Agricultural farm of Sher-e-Bangja Agricultural University (SAU). Ohaka, during December 2007 to May 2008, in Boro season to study the influence of nitrogen and plant spacing on growth and yield of born There were three doses of nitrogen (150. 200 and 250 kg hi') and four plant spacing's (25 cm x 10cm, 25 cm x IS cm and 25 cm N 20cm and 25 cm respectively). The experiment was laid out in a split-plot design with three replications. Nitrogen rates were placed in main plots and spacing in unit plots (sub-plot). The variety used in the experiment was BRRI dhan29. It was observed that higher rate ofnitrogen application and with higher plant spacing contributed highest plant height, number of tillers hill' and dry weight hilr' but closer spacing showed maximum leaf area index. In case of panicle length. 1000 grain weight, total grain yield, biological yield and harvest index were not responsive to higher rate of nitrogen application and maximum plant spacing but with the application of 200 kg N ha'with 25 cm x 15 cm plant spacing gave the highest grain yield (758 t hi'), biological yield, 1000 grain weight and harvest index.
INFLUENCE OF NITROGEN LEVEL AND WEEDING ON THE PERFORMANCE OF WHEAT
(DEPARTMENT OF AGRONOMY, 2009) SULTANA, SHEFAIN
A field experiment was conducted at the Agronomy Field, Sher-e-l3angla Agricultural University, during the period from November. 2008 to March. 2009, to find out the effect of nitrogen level and weeding on the performance of wheat. The treatments comprised live different levels of nitrogen (0 kg ha". 69 kg ha". 92 kg ha". 115 kg ha 1 and 138 kg ha") and three weedings (no weeding, one weeding at 30 days after sowing and two weedings at 30 and 60 days after sowing). The experiment was laid out in a spLit plot design with three replications assign nitrogen level in the main plot and weeding in the sub plot. Result showed that increasing nitrogen level upto 115 kg ha" and increasing number weeding increased grain yield by increasing all the yield contributing parameters. Interaction of 115 kg ha" and two weedings gave the highest values 11w the said parameters
INFLUENCE OF POPULATION DENSITY ON GROWTH AND YIELD OF INBRED AND HYBRID BORO RICE
(DEPARTMENT OF AGRONOMY, 2009) REZA, NOWALIN
The experiment was conducted at the experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during the period from November 2008 to April 2009 to study the influence of four levels of population density viz. I, 2 1 , 3 and 4 seedlings hilr1 on growth and yield of inbred (BRRI dhan28 and BRRI dhan29) and hybrid (BRR1 hybrid dhan2 and ACI hybrid dhan2) boro rice. The experiment was laid out in two factors Randomized Complete Block Design with three replications. Results showed that boro rice varieties differed significantly in all growth and yield characters and hybrid dhan gave superior return in case of yield. Among the varieties ACI hybrid dhan2 produced the highest grain yield (7.66 t hi'). Two seedlings hilr' gave the maximum tillers hilr' (18.15), highest dry matter hilr' (5.23 g), maximum effective tiller hilF 1 (13.19), longest paniele (29.43 cm) and highest grain yield (6.63 t ha d) while one seedling hill' had the highest numbers of filled grains panicle (85.90), maximum 1000 grain weight (23.50 g) and highest harvest index (47.46%). Interaction result showed that ACI hybrid dhan2 coupled with transplanting 2 seedling' hill' gave the highest grain yield (8.58 t haj while ACI hybrid dhan2 in combination with I seedling hill' gave the highest harvest index (50.14%)
PERFORMANCE OF WHEAT AS AFFECTED BY TIME OF IRRIGATION AND NITROGEN LEVEL
(DEPARTMENT OF AGRONOMY, 2009) HIRA, MOUSHUMI BAIN; DEPARTMENT OF AGRONOMY
An experiment was carried out in experimental field of the Sher-e-E3angla Agricultural University. Dhaka to investigate the performance of wheat as affected by inie of irrigation and nitrogen level during the winter season of 2009-2010. Five times of irrigation viz, one irrigation at crown root initiation (('RI) stage. one irrigation at maximum tillering stage. one irrigation at grain tilling stage, two in'igations at CR! - maximum tillering stage and three irrigations at CR1 - maximum tillering F grain Idling stage: and four levels of nitrogen viz. 92kg ha". 115kg ha d . 138kg ha" and 161kg ha' were used as variables. The experiment was laid out in a split plot design with three replications. Results showed that time of irrigation and nitrogen level had significant effect on different plant characters, yield and yield components of wheat. When irrigation was applied 3 times at ('RI - maximum tillering filling stage, various plant characters including yield and yield attributes-plant height. spike length. number of productive tillers plant'. number of effective spikes ii12. dry weight plant'. number of spikelets spike - '. number of grains spike", weight of 1000 seeds.grain yield. straw yield and harvest index had maximum values. On the other hand, when the plant characters-plant height and spike length were highest with 161kg N ha'', the yield and yield contributing characters-number of productive tillers plant'', number of effective spikes nf 2 . dry weight plant'. number of spikelets spike', number of grains spike'. weight of 1000 seeds, grain yield, straw yield and harvest index were highest with 115kg N ha'. Signif icantly. highest yield of wheat was obtained when irrigation was applied 3 times at CR1 - maximum I illering grain tilling stage along with the recommended nitrogen dose of 115kg ha".
PLANTING GEOMETRY OF WHEAT GROWN AS PURE STAND AND INTERCROPPING WITH GRASSPEA AND LENTIL
(DEPARTMENT OF AGRONOMY, 2009) KHATUN, MST. NURJAHAN
An experiment was conducted at the Agronomy field of Sher-e-Bangla Agricultural University, Dhaka, during November 2008 to March 2009 to evaluate the effect of planting geometry of wheat grown as pure stand and intercropping with grasspea and lentil on the productivity and economic performance of intercropping systems. The experiment consisted of twelve treatments (Ti = Sole wheat, T 2 = Sole grasspea, T3 = Sole lentil, T4 = Wheat Paired Row (WPR), T 5 = WPR + 1 Row grasspea, T 6 = WPR + 2 Rows grasspea, 1 7 = WPR + 1 Row lentil, T 8 = WPR + 2 Rows lentil, T 9 = 1:1 row ratio of wheat and grasspea, T 10 = 3:1 row ratio of wheat and grasspea, T 11 = 1:1 row ratio of wheat and lentil, T 12 = 3:1 row ratio of wheat and lentil), which were laid out in a RCB design with three replications. Results revealed that, planting geometry had significant effect on plant height, tillers planf', above ground dry matter planf', length of spike, spikelet spike 1 , 1000 grain weight, grain yield and harvest index of wheat. Planting geometry also significantly changed plant height, branches plant", above ground dry matter plant ', 1000 seed weight, seed yield (t ha') and harvest index of grasspea and lentil. The results showed that, planting pattern of one row grasspea fitted in between two paired rows of wheat (T 5 ) gave the highest wheat equivalent yield (4.31 t ha'), LER (1.38), monetary advantage (Tk. 13423.91 ha d), gross return (Tk.72369 hi' ),.net return (1k. 30126 ha d ) and BCR (1.71). The second highest BCR (1.70) and LER (1.19) were noted from To treatment (3:1 row ratio of wheat & grasspea). In this intercropping system grasspea showed better compatibility than lentil when intercropped with wheat.
WEED KILLING EFFICACIES OF HERBICIDES AS AFFECTED BY APPLICATION TIMES IN WHEAT
(DEPARTMENT OF AGRONOMY, 2009) REZA, MD. ZAKARIA
The biological efficacy of different herbicides (Sencor 7 WGJ SOOg ha 1 . Lintur 70 WG 250g hi'. Ronstar @ Iliter ha 4 ) applied at different stages of crop growth as compared to untreated areas was studied for controlling weeds in wheat in a field experiments at the research farm of Sher-e-Bangla Agricultural University during 2007- 08. Herbicides were applied at 7 DAS, 14 DAS and 21 DAS. A weedy check (no herbicide) was also included for comparison. The analysis of the data revealed significant differences among the times of application for biological yield and grain yield. Similarly significant differences were recorded for herbicidal treatments in traits like 1000 grains weight (g), biological yield (t ha 1 ) and grain yield (t ha 4 ). The interaction of the times of application and herbicides was significant for grain yield. Maximum 1000 grains weight (47.48g) was observed in plots treated with Ronstar, while minimum check plots (no herbicide). Biological yield (38.17g) in weedy (7.0 t hi') and grain yield (3.16 t ha 1) were higher in plots treated with Ronstar while lower biological yield (4.5 t hi') and grain yield (1.62 t ha4 ) were in weedy check plots. Ronstar proved to be the most economical and effective herbicides which gives maximum grain yield of yield (7.3 t hi'), when applied at 21 DAS in wheat.
YIELD PERFORMANCE OF SESAME IN RESPONSE TO POPULATION DENSITY AND SOURCE-SINK MANIPULATION
(DEPARTMENT OF AGRONOMY, 2009) ALIM, MD. ABDUL
An experiment was conducted at the Sher-e-Bangla Agricultural University Farm Dhaka 1207 (Tejgaon series under AEZ No.28) during Kharif-1 (March – June), 2008 to study the yield performance of sesame in response to population density and source-sink manipulation. Two factors (A) population density and (B) source-sink manipulation were initiated. Three population densities viz. (1) 30 plants m -2 (D 1 ), (2) 40 plants m (D 2 ) and (3) 50 plants m -2 (D ) and four source-sink manipulation viz. (1) no removal (M 0 3 ), (2) removal of lower empty leaves, lower empty branches and top of the inflorescence (M 1 ), (3) removal of all branches (M ) and (4) removal of lower empty leaves and lower empty branches (M 3 2 ) were comprised for the experiment. The treatment combinations were (i) D 1 M 0 , (ii) D 1 M 1 , (iii) D 1 M 2 , (iv) D , (vi) D 2 M 1 , (vii) D 2 M 2 , (viii) D 2 M 3 , (ix) D 3 M 0 , (x) D 3 M 1 , (xi) D 3 M . Significant effect was observe on the basis of population density, source-sink manipulation and their combination on plant height (cm), number of branches plant 2 , leaf area index, dry weight plant -1 , dry weight m -2 1 M 3 , (v) D and (xii) D (g), crop growth rate, number of capsules plant -1 , number of capsules m -2 , number of seeds capsule -1 , 1000 seed weight (g), yield plant -1 (g), total yield (kg ha -1 ), stover yield (kg ha -1 ) and harvest index. Results revealed that the highest number of capsules plant m -2 (1135.20), number of seeds capsule -1 -1 (28.38), number of capsules (70.66), 1000 seed weight (3.45 g), total yield (1725.45 kg ha -1 ) and harvest index (40.72) were obtained with the combined effect of D 2 M 1 (40 plants m -2 + removal of lower empty leaves, lower empty branches and top of the inflorescence). But the lowest number of seeds capsule -1 (66.30) and total yield (1060.75 kg ha -1 ) were obtained with the combined effect of D 3 M 2 (50 plants m + removal of all branches). However, to obtain a specific result and recommendation, more research work on sesame should be done in different Agro-ecological zones of Bangladesh.