Kajian Tindakan Konservasi Lahan Dan Pemupukan Serta Pengaruhnya Terhadap Pro…

This research aims to study the effect of conservation technique and fertilised which was done by the farmer to coffee production. This research was conducted at Silima Pungga-pungga, Dairi, North Sumatera. This research was done In February-March 2017. This research was conducted with Survey Method by taking some farmers as research sample. Sample was taken by used Purposive Sampling Metho…