Adaptability of different field crops under lahar laden soils
1992
Suyat, M.N. | Lacson, R.T. | Bayot, A.J. (Bureau of Plant Industry, Manila (Philippines). Agronomy Section)
Seventeen different annual field crops namely; sweet potato, cassava, upland gabi, arrowroot, yam bean, peanut, mungbean, soybean, cowpea, pigeon pea, corn, sorghum, roselle, sesame, hot pepper, leguminous covercrops and tororo-aoi were tested on a formerly lowland rice irrigated area totally covered with lahar at a depth of 1.5 to 2.0 meters primarily to determine and identify which crops can be grown suitably and successfully after the rainy season wherein the danger of lahar flow is extremely low. This study was conducted at Barangay San Antonio, Bacolor, Pampanga [Philippines] from November, 1991 to July, 1992. The agronomic and yield responses of the test crops were the parameters used as basis in assessing their adaptability to lahar. After 3 to 8 months of growth, results showed that plant growth and yield depend largely on the kind of crops and cultural and management inputs given. Stunted growth was very evident on all test crops grown without fertilizer due to the inadequacy of nutrients present in the lahar that is necessary for the sustenance for a normal growth. Laboratory analysis of the lahar deposits in the test site revealed that it contained 0.12% total N, 0.13% total P2O5, 0.38% total K2O, 0.09 S, 0.30% total Fe and 7.96 pH value. However, when applied with the recommended rate of complete fertilizer (14-14-14), there was a great manifestation that some crops could thrive and performs well in lahar. Among the initially tested crops, sweet potato, cassava, mungbean, peanut, cowpea, pigeon pea, corn, sorghum, soybean, sesame and leguminous cover crops appear to be the most suitable for lahar.
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