Browsing by Author "Ahmed, A. H. M."

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Comparative performance of modern wheat varieties in different salinity
(The Journal of Noami, 1994-12) Aich, A. C.; Mandal, R.; Ahmed, A. H. M.
Economic feasibility of bamboo subsurface drain-age in coastal saline soils of Bangladesh
(Intern. J. Trop. Agric., 1997-12) Aich, A.C.; Ahmed, A. H. M.; Mandal, R.
Effect of brackish water, organic matter, lime and gypsum on grain yield of wheat in salt affected soils of Bangladesh
(Journal of Indian Soc Coastal agric Res., 1995) Aich, A.C.; Mandal, R.; Ahmed, A. H. M.
Effect of GA3, KNap, C3 and nutrients on chlorophyll content of jute leaves
(Dacca University Studies, 1980-01) Ahmed, A. H. M.; Mohsin, M.; Aich, A.; Mandal, R.
Effect of NPK fertilizers on yield of oil and npk contents of sesame seeds (Sesamum indicmt)
(Nuclear science and applications, 1984) Mandal, R.; Ahmed, A. H. M.; Elahi, S. F.; Banik, G. G.
A pot experiment was designed in a 3® factorial combination with partial confounding to measure th« effect of N ( 0, 90, 180 kg/ha ), P and K ( each at 0, 22, 44 kg/ha ) on yield of oil and NPK contents of sesame seeds ( Sesamum indicum), individual application of N, P and K fertilizera produced significant impact on oil content of sesame seeds. Amongst them P showed its effectiveness most. N and P combinations were welleffective in increasing oil content. NPX at the highest levels was most promising in yielding oil. NPK at the medium rates also exhibited a nearly similar effect on oil content. N, P and K content of seeds were significantly varied by N application alone. In all respects, N ( 90 kg/ha ) plus PK ( each 22 kg/ha) played better in increasing the amounts of N, P and K in seeds.
Impact of foliar application of growth promoters (KNap and GA3) and Nutrients on ZEA MAYS
(Nuclear Science and Applications, 1989) Farid, A. T. M.; Mandal, R.; Ahmed, A. H. M.; Mohsin, M.
Foliar application of potassium naphthenate, gibberellic acid and nutrients made separately, or in combination with nutrients caused significant increase in various growth indices (except height and leaf number) and yield of Zea mays ( var. ganga ) over the control. The promoters proved to be superior to the nutrient solution. Of the two promoters, in general, gibberellic acid acted better with increasing concentration. Potassium naphthenate appeared to be much effective only at 2000 ppm. However, better results were not obtained when the promoters were applied with nutrients. Nevertheless, lower dose of gibberellic acid coupled with nutrients proved to be effective.
Impact of growth regulator-GA3, and nutrients on jute plants
(Journal of Bangladesh Academy of Sciences, 1978) Aich, A.C.; Mandal, R.; Ahmed, A. H. M.
Impact of growth regulators and nutrients on jute plants
(Dacca University Studies, 1977) Mohsin, M.; Ahmed, A. H. M.; Aich, A.; Mandal, R.
Impact of lime, gypsum and organic matter on rice grown in saline soils of Bangladesh
(Journal of Indian Soc Coastal agric Res., 1996) Aich, A.C.; Mandal, R.; Ahmed, A. H. M.
Impact of NPK fertilizers on mustard ( Brassica Juncea coas ) 1- Growth parameters
(Nuclear Science and Applications, 1984) Elahi, S. F.; Ahmed, A. H. M.; Mandal, R.; Hussain, M. M.
Growth component of mustard plant ( Brassica juncea coss ) have been studied from a NPK field experiment. Addition of nitrogen significantly increased the height, number of branches and pod per plant. Phosphorus also had a similar positive effect but to a smaller extent. Potassium had, in contrast, decidedly negative effect for all the parameters studied. Correlation study revealed that formation of pod was directly influenced by the number of branch which was again dependent on the height of the plant. Maturation of the mustard seed was delayed by nitrogen while enhanced by phosphorus and potassium application.
Impact of NPK fertilizers on mustard ( Brassica Juncea coas ) II. Yield components
(Nuclear Science and Applications, 1984) Ahmed, A. H. M.; Elahi, S. F.; Mandal, R.; Hussain, M. M.
Accumulation of dry matter and yield of mustard seeds have been observed from a NPK field trial experiment. Addition of nitrogen significantly increased the production of dry matter at 35 days of growth. Higher the rate of nitrogen supplied, higher was the dry matter yield. No such marked effect due to phosphorus addition was recorded, Accumulation of dry matter at harvest was significatly increased mostly by either N or P alone or by their combination. In constrast, potassium in both th« stages of growth decreased the yield of dry matter. Nitrogen and phosphorus application stimulated yield of mustard seeds almost double. Potassium supply, on the contrary, reduced the yield remarkably.
Impact of NPK fertilizers on mustard ( brassica juncea coss )iii. Oil and nutrient content of seeds
(Nuclear science and applications, 1984) Elahi, S. F.; Mandal, R.; Ahmed, A. H. M.; Hussain, M. M.
A field experiment following a pirtie.lly c D n t o u n d e d design w j s conducted to study the effect of NPK fertilizers on the oil and N, P, K, Ca and Mg contents of mustard seeds. Fertilizers showed an increase in oil content in most of the treatments, though not significantly. Increasing amount of eithar nitrogen or phosphorus decreased per cent oil content in seeds. However, both the nutrients together with potassium increased the same remarkbly. Concentration of N, P, K. Ca and Mg in seeds was not greatly influenced by fertilizer treatments. Effective oil yield was maximum in the plot receiving each of NPK at 131.4 kg/ha. However, from the economic point of view, the treatment of 134 4, 33 6 kg/ha of N and P, respectively, was considered to be the best.
Impact of NPK fertilizers on the growth, yield and oil content of sesame (Sesamum Indicum )
(Nuclear science and applications, 1979) Farid, A. T. M.; Ahmed, A. H. M.; Mohsin, M.; Mandal, R.
A pot experitneiu was conducted in a 3^ factorial design with partial confounding to evaluate the effect of HPK on S e s a m u m indicum ( var. Ganga ). NPK did not signiHcintly affect the height of the plant in the eatly statje of growth Increased height was attained at maturity by N, P and NP fertilization. In csntraat, K, NK and NP produced some growth retarding effect. N and NP combinations appeared to be effective in pod setting but P, K and PK combinations proved to be of no use in this respect. Yield of seeds was in general at par with pod setting. The highest yield was recorded at 224 kg/ha with each of N, P and K. Yield of seeds in general followed the same pattern as pod setting. N, NP, NK and NPK treatments appeared to Increase oil content in seeds by more than 5 tinr.es.
Impact of organic matter, lime, gypsum and brackish water on grain yield of rice in coastal saline soil
(The Journal of Noami, 1997-12) Aich, A.C.; Mandal, R.; Ahmed, A. H. M.
Impact of Organic matter, limit and gypsum on grain yield of wheat salt affected soils irrigated wuth different grades of brackish water
(J. Phytol. Res., 1997) Aich, A.C.; Ahmed, A. H. M.; Mandal, R.
Impact of soil amendments and brackish water on macronutrients (Na, K, Ca, Mg, N, P and S) contents of wheat grain grown in coastal saline soil
(J. Phytol. Res., 1998) Aich, A.C.; Ahmed, A. H. M.; Mandal, R.
Influence of Azotobacter inoculation on the availability of nitrogen in soil
(Dhaka Universiry Studies, 1988-07) Khan, S. I.; Mandal, R.; Ali, F.; Ahmed, A. H. M.
The change of N in the availability pool was sigmoidal with control and P; sinusoidal with inocula and P as well as with organic matter and P. The response was quasi-sigmoidal with organic matter and inocula. Amongst the single and dual combinations, Azotobacter cAroococctfw in the presence of organic matter performed better. Interaction of inocula, P and organic matter showed flattened to sharp sigmoidal change in the availability of , N. Both A. chroococcum and A. macrocytogenes in the presence of organic matter and higher dose of P exhibited better influence with well defined crest. Between the two inocula, Azotobacter chroococcum was more effective. Nitrogen availability was maximal at 20-day in all treatments under the experimental conditions.
Study of economic feasibility of agricultural subsurface drainage in saline soil of Bangladesh
(Journal of Indian Soc Coastal agric Res., 1996) Aich, A.C.; Mandal, R.; Ahmed, A. H. M.
The influence of Azotobacter inoculation on the availability of phosphorus in soil
(International Journal of Trop., Agri., 1987-06) Ahmed, A. H. M.; Khan, S.I.; Mandal, R.; Ali, F.
The influence of the two species of Azotohacter (A. chroococcum and A. macrocytogenes), phosphorus, organic matter, and their combinations was examined on available P under laboratory conditions. In all the treatments available P increased upto 20 days and then decreased by the end of 30 days. The release of available P was more on bacterial inoculation with organic matter and or phbsphonis than with inoculation alone, and was more with A. chroococcum than with A. macrocytogenes.
Use of soil amendments for improving rice yields under subsurface drainage in saline sodic soil irrigated with brackish water
(J. Phytol. Res., 1998) Mandal, R.; Aich, A.C.; Ahmed, A. H. M.