Strategies for a viable cropping system under rainfed lowland rice-based condition in relation to soil moisture availability
1995
Agustin, M.B.
Results of the study revealed that yield and yield components of the five rice varieties planted during the wet season were significantly affected by the two methods of land preparation. The wet seeded rice obtained significantly higher grain yield and number of productive tillers per unit area. On the other hand, the dry seeded rice produced significantly taller plants than the wet seeded rice. Among the five rice varieties tested, IR-64 registered the highest yield while PSB RcB and PSB Rc10 obtained the shortest daycount to maturity. Results of this study further revealed that mungbean planted after rice showed the best upland crop that could effectively utilize the residual soil moisture. Mungbean planted after rice under dry seeded method had higher root penetration in the soil profile, heavier seed weight, greater number of pods produced and higher grain yield. Mungbean planted under dry seeded rice obtained the highest net income over the rest of the crops evaluated. These were followed in descending order by planting soybean, corn and tomato. The rooting capability of the four upland crops showed that tomato plants had the longest rooting system followed by mungbean, soybean, and corn. Mungbean and soybean responded significantly to the time of rice harvest and tillage operation. Mungbean planted four days after rice harvest had higher percentage of crop establishment, while soybean under zero tillage obtained significantly better crop performance than mungbean and soybean planted under minimum and conventional tillage operation. The highest net income was noted for mungbean and soybean under a zero tillage operation planted 4 days after rice harvest
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