Introducing Green Chemistry–Based Slow-Release Fertilizer Technology to Farmers Using Zeolite and Biomass-Derived Carbon in Lempake, Samarinda

Abstract

Excessive use of chemical fertilizers in agriculture often leads to various environmental problems, including soil degradation, water pollution, and low nutrient-use efficiency. Therefore, alternative environmentally friendly and sustainable fertilizers are urgently needed. This community service program aimed to improve farmers’ knowledge and skills in producing slow-release fertilizers based on green chemistry principles using natural zeolite, activated carbon derived from lai (Durio kutejensis) peel, compost, and manure. The program was conducted with members of the Karya Mandiri and Sedap Malam farmer groups in Lempake, Samarinda, involving 30 participants. The implementation methods included preparation, training, demonstration of fertilizer production, mentoring, and evaluation using pre-test, post-test, and participant satisfaction questionnaires. The results indicated a significant increase in farmers’ understanding, with average pre-test scores ranging from 30–40% and increasing to 80–90% in the post-test. Participant satisfaction levels ranged from 88–95%. The fertilizer formulation consisted of 30% zeolite, 20% activated carbon from lai peel, 40% compost, and 10% manure, which functioned as a slow-release fertilizer capable of storing and gradually releasing nutrients. This activity demonstrates that the application of green chemistry approaches in fertilizer development can enhance farmers’ knowledge, reduce dependence on chemical fertilizers, and support sustainable agricultural practices within the community