A field experiment was conducted at the Horticultural Farm of Sher-e-Bangla Agricultural University, Dhaka from October, 2017 to March, 2018 to study the effect of micronutrients in presence of different level of organic manure on growth and yield of tomato. There were four combinations of micronutrients viz. N 0 =0 kg Zn 0 kg B/ha, N 1 = Zn 2 kg B 1.5 kg/ha, N 2 =Zn 4 kg B 2 kg/ha, N 3 =Zn 6 kg B 2.5 kg/ha and four organic manure viz M 0 =0 ton/ha, M 1 =Cowdung (15 ton/ha), M 2 =Poultry manure (10 ton/ha), M 3 =(Cowdung 7.5 ton/ha+ Poultry manure 5 ton/ha). The Afsun et al.; AJAHR, 4(2): 1-13, 2019; Article no.AJAHR.50434 2 experiment was laid out in a Randomized Complete Block Design with 3 replications and there were altogether 48 plots. Application of micronutrients and organic manure significantly influenced the growth, yield and size of the tomato. The highest yield (66.96 t/ha) was found from treatments N 2 and the lowest yield (25.69 t/ha) was obtained from treatment N 0 . Due to the application of organic manure, the highest yield (50.78 t/ha) was obtained from M 3 and the lowest yield (39.86 t/ha) was recorded from M 0 . In the case of combined effect, the highest yield (76.33 t/ha) was found from treatment N 2 M 3 and the lowest yield (24.60 t/ha) was found from treatment N 0 M 0 . So, the application of Zn 4 kg B 2 kg/ha along with Cowdung 7.5 ton+Poultry manure 5 ton/ha was the best for growth and yield of tomato. Economic analysis raveled that N 2 M 3 gave the maximum benefit-cost ratio (3.2). So, the application of Zn 4 kg B 2 kg/ha along with Cowdung 7.5 ton+Poultry manure 5 ton/ha was the best for growth and yield of tomato. Original Research Article

An experiment was conducted at the Horticulture Farm of Sher-e-Bangla Agricultural University, Dhaka during the period from October 2017 to April 2018. The present research was aimed to study effect of combinations of zinc and boron with fruit thinning on the quality seed production of tomato. There were four combination of zinc and boron viz. T0 =Zn0 kgB0kg/ha, T1=Zn2 kg B1.5 kg/ha, T2=Zn4kg B2 kg/ha, T3=Zn6B2.5 kg/ha and four levels of fruit thinning viz. P0= control (without fruit thinning), P1= 10 fruits were retained per plant, P2=20 fruits were retained per plant and P3 =30 fruits were retained per plant. The experiment was laid out in a Randomized Complete Block Design with 3 replications and there were altogether 48 plots. Application of micronutrients with fruit thinning significantly influenced the growth and seed yield of tomato. The highest seed yield (297.82 kg/ha) was found from T3 and the lowest yield (260.69 kg/ha) was obtained from T0. Due to the fruit thinning, the highest seed yield (337.41 kg/ha) was obtained from P3 and lowest yield (190.69 kg/ha) was recorded from P1. In case of combined effect, the highest yield (360.39 kg/ha) was found from T3P3 and lowest yield (180.39 kg/ha) was found from T0P1. So, application of Zn6 kg B2.5 kg/ha along with 30 fruits were retained per plant was the best for yield of tomato seed.

An experiment on effect of organic manure & mulching on the growth and yield of carrot was conducted at the farm of Sher-e-Bangla Agricultural University, Dhaka during the period from November 2017 to February 2018. The research consisted in Randomized Complete Block Design (RCBD) with three replications under a factorial arrangement (of two factors), with Four levels of organic manure, as the factor A and four mulches such as factor B. Organic manure and mulching influenced significantly (p=0.05) all the studied variables. In case of organic manure the maximum plant height (44.55 cm) root length (14.73 cm), root diameter (4.11 cm), root weight (124.50 g), root yield (24.90 t/ha) and marketable root yield (23.85 ton/ha) were recorded from O2 (Vermicompost) treatment. In case of mulches, maximum plant height (44.81 cm), root length (15.20 cm), root diameter (3.91 cm), root weight (117.85 g), root yield (23.57 t/ha) and marketable root yield (21.95 t/ha) found in M2 (Black polythene) treatment. And the combined effect of the highest root yield (29.06 t/ha) was obtained from O2M2 (Vermicompost + black polythene) and lowest (13.20 t/ha) from O0M0 (control). So, it can be concluded that 10 ton/ha vermicompost with black polythene mulch was the best for carrot cultivation. The highest gross return (Tk. 563200), net return (Tk. 446355) and BCR (4.82) were obtained from the treatment combination from O2M2  where the lowest gross return (Tk. 207800), net return (Tk.112755)  were obtained from O0M0 and lowest BCR (1.67) from O1M0.

The experiment was conducted at the farm of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during Rabi (November 2017 to March 2018) season to find out the growth, yield and economic benefit of spinach seed as influenced by nitrogen and phosphorus. The research involved two factors. Factor A: Four levels of nitrogen; N0= 0 kg/ha N1= 27.6 kg/ha, N2=55.2 kg/ha, N3= 82.8 kg/ha, and factor B: Four levels of phosphorus; P0= 0 kg/ha; P1 = 15.84 kg/ha, P2= 31.68 kg/ha, P3= 47.52 kg/ha. There were 16 treatment combinations in the experiment and laid out in Randomized Complete Block Design (RCBD) with three replications. Quality tests of seeds were done based on the germination test (%), seed vigor test (Electrical conductivity). In case of nitrogen, the highest seed yield (1.10 t ha-1), germination percentage (87.33%) and lowest value in EC test (11.87 dS/cm) were obtained from N2, while the lowest seed yield (0.81 t ha-1), germination percentage (79.33%) and highest value in EC test ( 13.87 dS/cm) from N0. For phosphorus levels, the highest seed yield (1.05 t ha-1), germination percentage (86.58 % and) and lowest value in EC test (11.79 dS/cm) were recorded from P2, whereas the lowest seed yield (0.84 t ha-1), germination percentage (79.91%) and highest value in EC test (13.35 dS/cm) from P0. Due to mutual effect, the highest seed yield (1.30 t ha-1), germination percentage (91.33%) and lowest value in EC test (10.2 dS/cm) were noted from N2P2, whereas the lowest seed yield (0.69 t ha-1), germination percentage (72.66%) and highest value in EC test (14.83 dS/cm) from N0P0. From the economic point of view, the highest Benefit-Cost Ratio (BCR) (1.59) was found in the treatment of N2P2 and the lowest BCR (1.01) was found in the treatment of N0P0. It is apparent that the treatment combination N2P2 gave the best performance for the seed yield and economic benefit of spinach.