Diagnosis of nutritional disorders of soybean | |
| Author | Sivanandarajasingam, Sivasubramaniam |
| Call Number | AIT Thesis no. 1239 |
| Subject(s) | Soybean--Research Plants--Nutrition |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science of the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | In order to develop methods for diagnosing nutritional disorders in soybean, a fertilizer experiment was carried out in the Agricultural Experimental Station of Asian Institute of Technology with soybean during the dry season (January - April) of 1977. The experiment was a 3x3x3 systematic design with no replication having three levels and combinations of N (O, 25 and 50 Kg/ha), P (O, 50 and 100 Kg/ha), and K (O, 50 and 100 Kg/ha) applied as basal dressing. Phosphorus was found to be the dominating nutrient. Increased application of phosphorus significantly increased concentration of P in the aerial parts of the young plants and yield. Increased P application further increased the concentration of Al in the plant tissues. Application of N increased concentration of N in aerial parts. At low P level, N application decreased yield, but a higher P level an initial de crease in yield was followed by an increase and at the highest P level there was a steady increase. Increased application of N increased P concentration when P application was high, while opposite was the case when the P level was low. A clear synergistic effect of N was found for concentration of Na. K application did neither affect the chemical composition of the plant nor the yield. Preliminary models of diagnosis and yield prognosis models were developed. They demonstrated clear relationships between application of nutrients, chemical composition of young plants and final bean yield. Diagnosis and yield prognosis were expressed quantitatively and could thus be tested by comparing the actual yields with calculated ones. The best result indicates a high degree of reliability of the models and methods. |
| Year | 1977 |
| Type | Thesis |
| School | Student Research Before 1979 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Nielsen, Jens Moller |
| Examination Committee(s) | Paiboon Prabuzdham ;Singh, Gajendra |
| Scholarship Donor(s) | Government of United Kingdom |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1977 |