BUILDING A LAND UNIT MAP OF THE DAK LAK PROVINCE

Abstract

The purpose of the research is to develop a land unit map to serve the assessment of agricultural land potential. The research area is Dak Lak province with a total surveyed land area of 1,189,057 hectares. Use ArcGIS software to build 6 simple maps for 6 hierarchical criteria including: Soil type, slope, soil texture, soil layer thickness, rainfall and irrigation regime. The land unit map is built on the basis of overlapping 6 simple maps. The results show that the study area has 146 land units with 2,041 land parcels, of which 1,534 land parcels have an area of 300 hectares or more, 245 land parcels have an area of >500 hectares. The area of land plots is quite large, which is a favorable condition when selecting and developing specialized crop growing areas. In the study area of Dak Lak province, there are nearly 800,000 hectares with favorable soil properties for the development of agricultural crops such as slope <15°, layer thickness >70 cm, medium to heavy soil texture, absolute altitude <1,000 m. However, the irrigated area is low, only 296,597 hectares; This is the district's highest limitation in agricultural development.