03349cas a2200409 a 4500 20260818095000.0 110902s1978 th uu|m rtt 0| a1eng d .b10227428 AIT Thesis no.AE-78-01 Ahmed, Mesbauddin Effect of irrigation and phosphorus fertilization on growth and yield of maize on acid sulphate soil Bangkok : Asian Institute of Technology, 1978 39 p. Thesis ; no. AE-78-01 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources & Development Thesis (M.Eng.) - Asian Institute of Technology, 1978 A field experiment was conducted with maize in the acid sulphate soil of Bangkok Plain during the dry season (January-April) of 1978. Three levels of phosphorus fertilization -0, 50 and 100 kg/ha along with 100 kgN + 50 kgK/ ha (applied as basal dressing in band) and three irrigation regimes - always at field capacity (13), water applied upto field capacity when 35% (I2) and 70% (11) of the available moisture were depleted. The experiment was a double split-plot design with three replication. Increasing amounts of applied phosphorus increased the concentration of N, P & Na but no definite relation was found with that of K. The concentration of N, P, K & Na also increased with the increasing irrigation frequency. DM production and plant height increased with increasing amount of applied phosphorus and irrigation frequency. 432, 442 and 452 mm of water were required for I1, I2, and I3 treatments respectively and the crop-coefficient curve was developed on the basis of percent soil moisture depletion as estimated by gravimetric method. Significant variation in grain yield was found with irrigation, phosphorus and irrigation x phosphorus interaction at 99% level of significance. Maximum and minimum grain yields were 4.11 and 0.01 t/ha with I3P100 and I1Po treatments respectively. Preliminary diagnosis and yield prognosis models were developed on the basis of chemical composition of young plant. A good agreement between predicted and experimentally obtained yield showed the reliability and correctness of the model. Phosphatic fertilizers Irrigation engineering Corn Fertilizers and manures Nielsen, Jens Moller, Chairperson Apichart Anukularmphai, Examination Committee Paiboon Prabuddham, Examination Committee Canadian Government, Scholarship Donor Asian Institute of Technology. Thesis ; no. AE-78-01 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B22611 .b10227428 mnait x 250813 2 951012 m a x 0 mnait mnarc 22 40 Barcode : 30050120584031 CREATED : 2013-10-06 RECORD # : i12731201 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160052998 CREATED : 2016-05-18 RECORD # : i1298159x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 34432 34432 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.AE-78-01 30050120584031 2026-08-18 09:50:00 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.AE-78-01 30050160052998 2026-08-18 09:50:00 1 2026-08-18 40