03149nam a2200385 4500 20260817171520.0 080598 th eng .b10116473 AIT Thesis no.AE-93-43 Manandhar, Ramita The biomass and nitrogen accumulation of three green manure crops as affected by soil moisture, seed rate and duration of cultivation Bangkok : Asian Institute of Technology, 1993 75 leaves : ill. Thesis ; no. AE-93-43 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Science. A study was conducted on biomass and nitrogen accumulation of three green manure crops as affected by soil moisture, duration of cultivation and seed rate, in acid sulphate soil of Bangkok plain from February to April in 1993. The three green manure crops grown were Crotalaria juncea, Sesbania rostrata. and Aeschynomene afraspera. Four soil moisture regimes were maintained by irrigating at 5 days, 15 days and 30 days interval and no irrigation, control. 30 day, 45 day and 60 day were the three durations of cultivation. 2 millions and 4 millions/ha were the 2 levels of plant densities. The overall performance of Crotalaria has been shown to be significantly better among the three crops in terms of biomass production and nitrogen accumulation. Under soil moisture stress conditions, Crotalaria continues to be s uperior over the other two crops in terms of biomass and nitrogen accumulation. An increase in moisture stress has decreased the biomass and nitrogen accumulation efficiency in all the crops in a sig nificant manner. A single irrigation did not produce a ny significant effect over the control for any green manure crop. Crotalaria was observed to have rapid initial growth in comparison to the other two crops. An increase in the seed rate raised the plant population per unit area for all the three crops. However, in terms of nitrogen and biomass accumulation, the seed rate seems to have sig nificant effect only in case of Aeschynomene. Thesis (M.Sc.) - Asian Institute of Technology, 1993 Green manure crops Upasena, Selawa H., Chairperson Murali, N. S., Examination committee Loof, Rainer, Examination Committee Government of Norway, Scholarship donor Asian Institute of Technology. Thesis ; no. AE-93-43 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B16127 .b10116473 mnait x 240411 2 951012 m a x 4 mnait mnarc 22 40 Barcode : 30050120727051 CREATED : 2014-02-18 RECORD # : i12765983 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120376107 CREATED : 2016-01-06 RECORD # : i13010682 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 12521 12521 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.AE-93-43 30050120727051 2026-08-17 17:15:20 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.AE-93-43 30050120376107 2026-08-17 17:15:20 2026-08-17 40