http://localhost:8080/handle/123456789/2714 2026-04-18T16:17:06Z http://localhost:8080/handle/123456789/2516 EFFECT OF NITROGEN LEVELS AND TIME OF APPLICATIONS ON YIELD AND QUALITY OF SOYBEAN AKTHER, ZAKIA A field experiment was conducted at the Agronomy research field, Sher-e-Bangla Agricultural University, Dhaka during January 2013 to March 2013,to find out the effect of 4 nitrogen levels viz., N1 (10 kg ha-1), N2 (20 kg ha-1), N3 (30 kg ha-1), N4 (40 kg ha-1) and different splitting of nitrogen viz., S1= ( split application at basal), S2= (split application at basal and at 10 DAS), S3= ( split application at basal, at 10 DAS and at 20 DAS) and S4 =( split application at basal, at 10 DAS, at 20 DAS and at 30 DAS) on the seed yield and quality of soybean. The application of nitrogen levels had significant effect on yield and quality contributing parameters of soybean irrespective of splitting of nitrogen. Application of 40 kg ha-1 exhibited the best performance for all growth, yield and seed quality of soybean. From 4 split N application (at basal, at 10 DAS, at 20 DAS and at 30 DAS) showed best results whereas lowest in split application at basal. Out of 16 treatment combinations, 40 kg ha-1 with 4 split application at basal, at 10 DAS, at 20 DAS and at 30 DAS of nitrogen performed the best in terms of yield and quality of soybean. The maximum yield (2.29 t ha-1) was obtained by 40 kg N ha-1 with 4 split application at basal, at 10 DAS, at 20 DAS and at 30 DAS. The maximum protein percentages (40.79%) was found in N4S3 combination whereas the minimum (36.10%) was in N1S3. These results indicated that the application of 40 kg N ha-1 with 4 split application ( at basal, at 10 DAS, at 20 DAS and at 30 DAS) would be best for maximizing the seed yield and quality of soybean. A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE (M.S) IN AGRONOMY SEMESTER: JANUARY - JUNE, 2014 2014-06-01T00:00:00Z http://localhost:8080/handle/123456789/2515 IMPROVEMENT OF GERMINATION AND SEEDLING GROWTH OF RICE THROUGH PRIMING UNDER SALT STRESS CONDITION BADHAN, WASIA JAHAN An experiment was conducted at the Agronomy laboratory of Sher-e-Bangla Agricultural University, Dhaka-1207 during the period from July, 2013 to December, 2013 to improve germination and seedling growth of rice through seed priming under salt stress condition. The experiment was laid out in a completely randomized design (CRD) with five replications. BRRI dhan28 (V1, salt sensitive) and BRRI dhan47 (V2, salt tolerant) were used in this experiment. The treatments comprised five levels of salt concentration (0, 50, 100, 150 and 200 mM NaCl) and priming times (6, 9, 12, 15 and 18 hr). Results revealed that germination percentage (GP) 97.75%, germination index (GI) 40.95, seedling length (SL) 143.3 and vigour index (VI) 144.90 were improved by seed priming. Seeds primed with 100 mM NaCl gave the better result compared to non-primed seeds in V1 varieties. Seeds primed with 150 mM NaCl gave the better result in terms of germination behavior and seedling growth compared to untreated control in V2 varieties. Then seeds of V2 was primed in 0, 6, 9, 12, 15, 18 hrs with 150 mM NaCl solution and distilled water. Priming time 15 hours showed the best result in V2 varieties when seeds primed with 150 mM NaCl ( GP, GI, SL,VI, SL, RL) compared to water priming and untreated control. Finally V1 primed with water and 100 mM NaCl and V2 primed with distilled water and150 mM NaCl solution for 15hrs. Dry seed used as control and was exposed to 0, 50, 100, 150 and 200 mM NaCl induced salt stress conditions in Petri dishes. In both varieties (V1 and V2) when the salt stress was increased at the same time GP, GI, VI and SL was decreased. The highest GP, GI, VI and SL were detected in the treatments of control and lowest GP, GI, VI and SL were detected in the treatments primed with 200 mM NaCl. A Thesis Submitted to the Faculty of Agriculture Sher-e-Bangla Agricultural University, Dhaka in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE IN AGRONOMY SEMESTER: JULY-DECEMBER, 2014 2014-06-01T00:00:00Z http://localhost:8080/handle/123456789/2514 WEED SUPPRESSION FOR INCREASING PROFITABILITY IN JUTE CULTIVATION BY INCORPORATING LEAFY VEGETABLES (GREEN AMANRANTH AND JUTE) AFROSE, UMME RUMANA An experiment was conducted at the Agronomy fields of Sher-e-Bangla Agricultural University, Dhaka, during the period from April to August 2013 to study the weed suppression in Jute field by growing leafy vegetables (either green amaranth or incorporating higher jute plants) and thereby increasing the profitability of jute cultivation. The experiment was laid out in a randomized complete block design with 3 replications. The treatments comprised either sole jute cultivation or in combination of fiber jute with jute for leafy vegetable or with amanranth (T1 = Control, jute only, spacing 30 cm; T2 = Jute row spacing 30 cm + one line jute (as leafy vegetable) between two adjacent jute lines; T3 = Jute row spacing 30 cm + jute broadcast (as leafy vegetable) between two adjacent jute lines; T4 = Paired row jute 15 cm apart + 4 rows amaranth (as leafy vegetable) 15 cm apart between two adjacent paired rows of jute; T5 = Paired row jute 15 cm apart + broadcast jute (as leafy vegetable) between two adjacent paired rows of jute; T6 = Jute 30 cm apart + one amaranth line (as leafy vegetable) between two adjacent jute row; T7 = Jute 30cm apart + broadcast amaranth (as leafy vegetable) between two adjacent jute row; T8 = Mixed jute for fiber (6 kg ha-1 ) and amaranth (4 kg ha-1) sown for leafy vegetable; T9 = Mixed jute for fiber (6 kg ha-1 ) and amaranth (2 kg ha-1) as leafy vegetable; T10 = Paired row jute for fiber 15 cm apart + broadcast amaranth (as leafy vegetable) between two adjacent paired rows of jute; T11= Paired row jute for fiber for fiber 15 cm apart + 3 rows amaranth (as leafy vegetable) between two adjacent paired rows of jute T12= Paired row jute for fiber 15cm apart + 4 rows jute (as leafy vegetable) between two adjacent paired rows of jute; T13= Mixed jute for fiber (6 kg ha-1) and amaranth (8 kg ha-1) for leafy vegetable). Results showed that the greater amount of jute sak was obtained from T1, T4, T6 and T10 (over 26 g m-2). The longest jute plant was observed in T6 (2.67 m). In the 1st weeding the greatest weed infestation was seen in T11 but in the second weeding, that was found in T13. Significantly higher jute fiber yields were obtained in T1, and T6 (over 3.7 t ha-1). Significantly greater harvest indices were obtained from T3, T6, T9 and T12. (around 40%). The highest costs in respect of weeding (9000 Tk.ha-1) and total costs was obtained with T1 (76421 Tk.ha-1). T1 and T6 showed identical value of jute fiber (over 148000 Tk.ha-1) with the greatest cost in T1. T1 and T6 also showed higher total returns (over 154000 Tk.ha-1). However, the highest net income was obtained with T6 (94997Tk.ha-1) along with the highest Benefit cost ratio (1.61). A Thesis Submitted to the Department of Agronomy Sher-e-Bangla Agricultural University, Dhaka -1207 In partial fulfilment of the requirements for the degree of MASTER OF SCIENCE (M.S.) IN AGRONOMY 2014-06-01T00:00:00Z http://localhost:8080/handle/123456789/2513 EFFECT OF DIFFERENT WEED CONTROL METHODS ON THE YIELD OF TRANSPLANTED AMAN RICE VARIETIES SHARMIN, TANIA A field experiment was conducted at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during August to December, 2013 in T. aman season with a view to find out the performance of two transplanted aman rice varieties BRRI dhan56 and BRRI dhan57 under different weed control methods viz. chemical herbicide Rifit 50EC (Pretilachor 500 g L-1) @ 1 L/ha (W1), polythene paper (W2), stale seedbed (W3), one hand weeding at 20 DAT (W4), two hand weeding at 20 and 40 DAT (W5) and no weeding (control) (W6) using split plot design. Eighteen different weed species infested the field among which Cyperus michelianus (36.73%), Cyperus esculentus (17.31%) at 30 DAT; Cyperus esculentus (25.13%) Alternanthera sessilis (21.53%) and Cyperus difformis (15.79%) at 60 DAT, Fimbristylis miliaceae (19.50%) at 90 DAT were dominant. Two hand weeding at 20 and 40 DAT (W5) showed highest weed control efficiency 89.90% at 30 DAT, 59.74% at 60 DAT and 78.85% 90 DAT. The results showed that BRRI dhan56 produced the highest (3.70 t ha-1) grain yield when two times weeding were performed at 20 and 40 DAT. BRRI dhan56 produced longest panicle length (23.39 cm), 1000-grain weight (23.12 g), grain yield (3.14 t ha1), straw yield (5.16 t ha-1), biological yield (8.90 t ha-1), harvest index (35.08%) better than the BRRI dhan57. Economic analysis of the weed control parameters shows that, the highest (1.92) BCR was recorded from the chemical herbicide Rifit 500EC weed control. While the two hand weeding, stale seed bed and one hand weeding produces 1.79, 1.69 and 1.48 BCR respectively. A Thesis Submitted to the Department of Agronomy, Sher-e-Bangla Agricultural University, Dhaka in partial fulfilment of the requirements for the degree of MASTER OF SCIENCE IN AGRONOMY SEMESTER: JULY-DECEMBER, 2014 2014-06-01T00:00:00Z