Combined effect of water and fertilizer on maize crop in acid sulphate soil | |
| Author | Khan, Rash |
| Call Number | AIT Thesis no.AE-78-06 |
| Subject(s) | Crop yields Corn--Irrigation Corn--Fertilizers and manures |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources & Development |
| Publisher | Asian Institute of Technology |
| Abstract | The effect of three water depletion regimes combined with three nitrogen treatments on maize crop was studied on a clay soil during the dry sea son of 1978 at the Asian Institute of Technology Bangkok, Thailand. The mean actual evapotranspiration obtained by the oven dry method remained 6.2 nun/day for the entire crop season. The crop factor for maize crop was found to be 0.64 at the initial stages which increased to a maximum of 1.02 and remained constant during tasseling to maturity stage and decreased to 0.66 thereafter. The mean value of the crop factor remained 0.85 for the entire crop season. Maize irrigated with higher level of available moisture gave higher yield. Yield obtained at 70% depletion were less when compared with that obtained at 35% depletion. Similarly yield increased with increasing application of nitrogen fertilizer. At 100 Kg N/ha the yield was higher when compared with 50 Kg N and 0 Kg N/h and was negligible where no fertilizer was applied. It was also observed that the higher level of available moisture gave higher yields with increasing amount of N fertilizer. There was no significant water nitrogen interaction in grain yield· and interaction found in case of nutrient uptake. N, P, K, Na concentration in the plant increased with increasing amount of available water and decreased with the two depletion levels. It was also observed that the uptake of N, P, K, Na increased with in creasing amount of N application. Model developed for prediction of yield on the basis of climatic factors showed favorable results in determining the water requirements of the crop and the prediction of yield. The yield prognosis and diagnosis model gave accurate results which were close to the actual values. |
| Year | 1978 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Aprichart Anukularmphai |
| Examination Committee(s) | Nielsen, Jens Moller ;Paiboon Probuddham |
| Scholarship Donor(s) | United States Agency for International Development, Islamabad, Pakistan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1978 |