Education of Location Specific Fertilizer Application on Marginal Land

Fertilizer application must be done properly to prevent land degradation. Marginal lands with low physical, chemical and biological fertility require specific fertilization technologies. Tana Tidung Regency (KTT) has land that is mostly classified as marginal. The technology for fertilizing specific nutrients for marginal land locations must be understood by agricultural extension workers so that they can be disseminated to farmers. This community service activity is in collaboration with the Sesayap Agricultural Extension Center (BPP) and aims to increase the knowledge and skills of agricultural extension workers in Tana Tidung Regency regarding nutrientfertilization specific to marginal land locations. There are two activities in this community service, namely 1) Counseling on nutrient fertilization specific to marginalland locations; 2) Conduct site-specific fertilization demonstration plots with integrated fertilization for sweet potato plants. The results of this community service activity can increase the knowledge of agricultural extension workers in Tana Tidung Regency about location-specific nutrient fertilization and can practice it through integrated fertilization applications. Integrated organic-inorganic fertilization is proven to provide higher sweet potato production than inorganic fertilizers. Dissemination of site-specific fertilization with integrated fertilization application to farmers in agricultural extension work areas can improve marginal lands and support the realization of sustainable agricultural systems.