Utilization of available soil moisture and residual fertilizer by mungbean (Vigna radiata) after rice grown in an acid sulfate soil with water supplementation | |
| Author | Juico, Charlito R. |
| Call Number | AIT Thesis no. AE-87-42 |
| Subject(s) | Soil moisture Fertilizers and manures |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | This study was conducted to find out a method to efficiently conserve the soil moisture in order to extend its use and to utilize the residual soil fertilizer for the growth of mungbean after rice in an acid sulfate soil with water supplementation (hand watering). The different water conservation methods (main treatments) evaluated were: a) Zero Tillage + Water + Mulch; b) Till + Water + Mulch; c) Till + No Wat e r + Mulch and d) Till + Water+ No Mulch, while the different levels of fertilizer (sub treatments> were: 1> Residual fertilizer; 2) 180 kg Ammonium phosphate/ha; 3> 250 kg Triple superphosphate/ha and 4> combination of 2 & 3. Results showed that tillage and water supplementation significantly influenced seed yield of mungbean but mulching did not. However, combination of tillage and mulching were found very effective in conserving the moisture in the soil. Phosphorus CP> was found to be the most limiting nutrient for mungbean in this soil. The seed yield and straw yield significantly increase d with increasing levels of P. Application of P also increased concentration of P in the aerial parts of mungbean. Nitrogen (N) had no significant effect on the seed yield though N-supplied plants performed better during the early stage of growth. Likewise , N had no marked increased on the N concentration in the aerial parts of mungbean. The highest yield of 0 . 78 t/ha was obtained using 180 kg Ammonium phosphate + 25 0 kg Triple superphosphate/ha under Till + Water + No Mulch. This is a satisfactory yield since it is within the range of farmers' yield of 0. 50 to 0. 80 t/ha in this region . The available family labour in the farm was more than enough to supply the labour requirements for growing mungbean after rice without jeopardizing other labour requiring activities of the different sub-systems at the integrated farm. In terms of income, as far as the condition of the farmer in the farm is concerned, the result obtained a t the residual fertilizer level under Till + Water + Mulch with an income of i 1208/ha is the most economical and suitable for him to consider. With this level of fertilizer use the farmer need not allocate a portion of his meager income for purchase of fertilizer. On the other hand , if his main purpose is to generate profit and capital is not limiting then application .of 180 kg Ammonium phosphate + 250 kg Triple superphosphate/ha under Till + Hater + No Mulch is the most appropriate for him to consider. With this , an income of ~ 2246/ha can be generated. |
| Year | 1987 |
| 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) | Gartner, Joseph A. |
| Examination Committee(s) | Nielsen, Jens Moller ;Peacock, Christabel P. |
| Scholarship Donor(s) | Food and Agriculture Organization of the United Nations (FAO/UN) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1987 |