Developing a nitrogen fertilization system in maize | |
| Author | Guerra, Larry C. |
| Call Number | AIT Thesis no. AE-86-03 |
| Subject(s) | Nitrogen fertilizers Corn--Fertilizers and manures |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A nitrogen (N) fertilizer field experiment was conducted at the proposed field for agricultural experiments of the Asian Institute of Technology. The aim is to test and further develop preliminary models of N diagnosis, yield prognosis and therapy for maize. Five levels of N treatment and five replications per treatment were used. The plots were arranged in a Latin square design. There was no N fertilizer applied in the 0 kg N/ha plots. The 50, and 100 kg N/ha treatments were given in one basic application while for the 150 and 200 kg N/ha treatments split application was us e d; by supplementary application of 50 and 100 kg N/ha to treatment 100 kg N/ha. Samples of the aerial parts of maize plants were taken at weekly intervals and analyzed for N, P and K eight times during the growth period. The data obtained after correcting the concentration of these three nutrients to a fixed Dry Matter weight level (DMW-level) of 5 g per plant formed the basis for testing and further developing the preliminary models of N fertilization for maize formulated by LABSETHWAR and MOLLER NIELSEN <1979). The results supported the reliability of the above - mentioned models in evaluating the nutritional status of the young maize plant. The similarity in the new areas of nutrient concentrations obtained in the present study to the previous results led to an improved system, covering a wider range of nutrient concentrations. |
| Year | 1986 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Nielsen, Jens Moller |
| Examination Committee(s) | Jensen, Jens Raunso ;Rahman, Md. Ataur |
| Scholarship Donor(s) | Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1986 |