Evaluation of Sugarcane-Based Land Utilization Types in Negros Occidental, Philippines

Abstract

Five major soil series (Guimbalaon, Isabela, Luisiana, San Manuel, and Silay) in Negros Occidental were studied to identify the different sugarcane-based land utilization types (LUTs) in the province; determine the physical and chemical characteristics of different land utilization types cultivated to sugarcane; evaluate the existing management practices of different sugarcane-based land utilization types; and draw soil management recommendations for sugarcane production based on soil constraints of major soil series. LUT 5 received the highest pH value and was also rated very high in exchangeable Ca and available P. Organic carbon content was rated very low in all LUTs and low in percent total N. Exchangeable Mg was rated medium in LUTs 1, 3, 5, and 6 while LUTs 5 and 6 were also rated medium in cation exchange capacity. Exchangeable K, on the other hand, was rated high in LUT 4 and low in LUTs 1, 2, 3, and 5 while exchangeable Na was rated low (LUT 1) to very low (LUTs 2–6). Soil management recommendations for constraints on topography in Guimbalaon and Luisiana series (LUTs 1, 2, and 4), were the implementation of a good soil conservation cropping and tillage practices such as contour terracing or farming while problems on wetness in Isabela, San Manuel, and Silay series (LUTs 1–6) could be managed by raising the height of the soil surface and elevate the site by adding 25-30cm of well-drained topsoil, compost or other organic matter to raise the planting zone and build drainage canals to direct water away from plants or other spots that collect water.