Development of alternative cropping systems in rainfed areas served with small farm reservoirs
1996
Labios, R.V. | Labios, J.D. | Villancio, V.T. | Salazar, A.M. | de los Santos, R.E. (Philippines Univ. Los Banos, College 4031, Laguna (Philippines). Farming Systems and Soil Resources Inst.)
Four crop rotator systems, rice-green corn, rice-mungbean, rice-peanut and rice-sweet potato were compared to the farmers' cropping patterns (CP) of rice-fallow in terms of crop production and economic performance in six on-farm trial sites in rainfed lowland rice areas in San Ildefonso, Bulacan [Philippines]. Irrigation water from small farm reservoir, a small water impoundment structure (usually 1,000 sq m), was applied when needed. Incorporated in the CP trial is a rice variety trial with six Philippine Seed Board (PSB) rice varieties planted in subplots and compared with PSB RC-4 variety in the main plot. Also superimposed in the variety and crop rotation trials was a fertilizer trial comparing four fertilizer levels involving various combinations of inorganic and bio-organic fertilizers (BOF). Among the green corn varieties tested, Improved Macapuno and Supersweet applied with 500-1000 kg/ha BOF + 92 kg N/ha produced the best yields and high net benefits. Sweet potato varieties UPL SP2 and UPL SP5 when applied with 28-28-28 kg NPK/ha using inorganic fertilizer produced better yield. Peanut variety EG red produced better grain yield and higher net benefit. Mungbean did not thrive well due to the low soil pH (4.0-4.5) in the area. Rice varieties PSB RC-10 and PSB RC-6 were observed to be most adaptable in the area in terms of production and economic performance
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