Martin
Isabela State University, Philippines.
Title: Soil characterization and land suitability evaluation of major soils towards food sufficiency in Cagayan valley, Philippines.
Biography
Biography: Martin
Abstract
Scientific land evaluations are important to properly identify an appropriate land use. Suitability analysis allows identification of the main limiting factors for the agricultural production and enables decision makers to develop crop management technologies able to increase productivity of the land. This study aimed to develop a GIS-based approach for land use suitability assessment which will assist farmers and land use planners to identify areas with physical constraints for a range of nominated land uses. Using the basic soil information obtained from field survey and laboratory analysis and matched with the growth and production requirements of the crop, the suitability of major agricultural soils for eleven main crops was assessed as per FAO land evaluation. Different land quality parameters, viz. soil texture, depth, erosion, slope, flooding and coarse fragments under various land units were evaluated for the crops. Soil suitability maps were prepared using Arc GIS software.
From the 911,167 hectares considered agricultural soils, 39.53 per cent were considered moderate to suitable, 47.30 percent are marginal and 13.16 percent with severe limitations. Lowland area covering 18.47 percent is suitable for rice cultivation and moderate to 33.49 percent. About 17.38 per cent are suitable for upland rice and corn, 13.39 percent is considered moderate for upland rice while 43.90 percent for corn. For the minor crops, 18.27 percent for coconut, 18.15 percent for tobacco and cassava, 17.38 percent is suitable for fruit crops, sugarcane, and peanut. Based on current state of knowledge and available technology, moderately suitable areas can be transformed to highly suitable status through the adoption of appropriate soil management and improvement practices. This can further ensure that a sufficient volume of agricultural products can be produced.