To find out the responses of soybean genotypes in terms of different levels of irrigation with the aim of evaluating the growth, yield, and its optimum levels of irrigation, an experiment was conducted at the Field of Crop Botany Department, Bangladesh Agricultural University, Mymensingh during the period from November 2000 to February 2001. Five levels of irrigation viz. ~textrmI0 : no irrigation, ~textrmI1 : one time irrigation at 20 days after sowing (DAS), ~textrmI2 :two times irrigation at 20 and 40 DAS, ~textrmI3 : three times irrigation at 20, 40, and 60 DAS, and ~textrmI4 : four times irrigation at 20, 40, 60, and 80 DAS and three genotypes of soybean viz. BS-3, BS-16, and BS-60 were used in this experiment. The crop was grown in a split plot design having three replications. The plant height, leaf area index, crop growth rate, shoot dry weight, branches ~textrmplantI-1 , filled pods ~textrmplantI-1 , seeds ~textrmplantI-1 , seed yield, and harvest index were influenced significantly by irrigation and these were found to be highest at three times irrigation except branches ~textrmplantI-1 . The chlorophyll content increased but empty pods ~textrmplantI-1 decreased with increase in irrigation levels. Genotypes of soybean varied significantly in terms of growth attributes at various growth stages except shoot dry weight at 90 DAS. The genotype BS-3 performed better compared to other genotypes and gave maximum seed yield.

An experiment was carried out at the Field Laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh from March to July, 2001 to investigate the effect of biofertilizers on morpho-physiological characters of okra. The experiment was laid out in a randomized complete block design with four replications. There were nine treatments such as ~textrmT0 (control), ~textrmT1 (Azotobacter biofertilizer), ~textrmT2 (Azospirillum biofertilizer), ~textrmT3 (Azotobacter+Azospirillum biofertilizers), ~textrmT4 (Azotobacter+Cowdung 5 ton ~textrmha-1 ), ~textrmT5 (Azospirillum+Cowdung 5 ton ~textrmha-1 ), ~textrmT6 (Azotobacter+Azospirillum+Cowdung 5 ton ~textrmha-1 ), ~textrmT7 (Cowdung 5 ton ~textrmha-1 ) and ~textrmT8 (60% Nitrogen). The experimental results revealed that significant variations exist among the treatments regarding morphological characters e.g. plant height, number of leaves/plant, stem base diameter, tap root length, and physiological characters like, root dry weight, leaf area index and crop growth rate. Number of leaves/plant, stem base diameter, root length, root dry weight, leaf area index and crop growth rate were found higher in ~textrmT4 , ~textrmT5 , ~textrmT6 and ~textrmT8 than the others. In all the parameters, ~textrmT8 gave the similar result with biofertilizers in combination with cowdung treatments and ~textrmT7 showed identical with ~textrmT0 (control). Biofertilizer treatments had insignificant effect on 1000-seed weight(g). Experimental results mentioned above revealed that morpho-physioligical characters of okra could be modified by the application of biofertilizer+cowdung. However, biofertilizers+Cowdung treatments were comparable to ~textrmT8 (60% Nitrogen) in this study. This suggests that ~textrmT4 or ~textrmT6 or ~textrmT5 were more benificial in environmentally friendly okra cultivation and may be used as an alternative of inorganic nitrogen by saving cost of production and sustaining productivity.