Evaluation of Land Suitability of Horticultural Crops in Sembalun Sub-district, East Lombok Regency, Indonesia

Abstract

Abstract This research aims to discover the data of land characteristic/quality, land suitability, limited factor, and improvement effort, directives of use and map of suitability for horticultural crops. The crops that are evaluated include red chili, onions, garlic, oranges, and apples. The selection of commodities is based on fluctuating production data, them are superior plant, and has a good market price. This research was conducted in November 2017 until January 2018 in Sembalun Lawang Village and Sembalun Bumbung Village, Sembalun Sub-district East Lombok Regency. Soil analysis was conducted in Soil Laboratory of Agriculture Faculty of Udayana Universit. It was analyzed using GIS modelling. Obtained six units homogeneous of land based on the result overlapped type of soil, land used and slopes, that is SBAISw, SBAIITg, SBAIVTg, SLHISw, SLHIITg, and SLHIVTg. The Land suitability assessment based on criteria requirements grew from Ritung et al., matchs with land characteristic/quality [1]. The result showed that the actual suitability class of land for horticultural crops was appropriate (S2) until they were not appropriate (N). Limited factors in the research area among others temperaturee (tc), rainfall (wa1), long dry months (wa), drainage (oa), textures (rc1), CEC (nr1), N-Total (na1), P2O5 (na2), slopes (eh1), and the dangers of erosion (eh2). Improvement of land suitability class can be done with improvement effort except temperaturee, long dry months and texture because they are permanent divider. Giving organic materials can improve soil physical and chemical properties. Slopes and the dangers of erosion can be improved by conservation tehcniques such as terracing. Class of potential land suitability was appropriate (S2) until they were marginal appropriate (S3). Land use of recommendations on SBAISw, SLHISw, and SBAIITg land are red chilli, garlic, and onion. SLHIITg, SBAIVTg, and SLHIVTg recommended for red chili, orange and apple crops based on agro-ecosystem, agroeconomic, and field observation.