Building an online map (WebGIS) of agricultural soil to serve the management and orientation of crop restructuring to improve agricultural production efficiency in Nhu Xuan district, Thanh Hoa province

Abstract

The research was conducted on 15,944.36 hectares of agricultural land in Nhu Xuan district, Thanh Hoa province. The results of land assessment have identified 32 land units and 99 agrochemical codes on 4 types of soil belonging to 2 main soil groups: Ferralsols and Luvisols, of which the area is Ferralsols group is 98.97%. The agricultural land area with poor total nitrogen and total potassium content accounts for about 60%, poor digestible phosphorus and digestible potassium, total organic matter content (OM) and exchangeable absorption capacity (CEC) in the soil are low, pH_KCl in soil ranges from moderately acidic to very acidic. The recommended amount of fertilizer for main crops in two groups: annual crops and fruit trees has been determined. Proposing 6 types of crop structures suitable to the agricultural production development orientation of Nhu Xuan district. The open source online database (WebGIS) on agricultural land of Nhu Xuan district is built based on applications of geographic information system software (Mapinfo, ArcGIS, QGIS) combined with the Web site includes: agrochemical map, land suitability map; map recommends balanced fertilization; base map (district boundaries, commune boundaries, traffic, rivers and lakes, elevation…); databases in the form of information (videos, photos, news, reports, farming techniques, farming processes, articles and linked websites with content related to agricultural production); data databases (agrochemical sample analysis data by sampling location, crop production statistics and meteorological data). Online maps (WebGIS) of agricultural land are easy to use and find information to help agricultural extension work and farmer households practice agriculture accurately and effectively.