The upstream of Kamparwatershed represent the part of Siak Watershed in the Province of Riau which has been degradated.This research aims to determine the location, wide, and degree of the land criticality according to ...

The role of organic fertilizer in the soil is the addition of organic matter in the soil that serves as a source of plant nutrients, improve the ability of the soil porosity which improves soil aeration and drainage, ...

An evaluation of suitable to crop cultivation based on land characteristics and benefit values were needed to decision making, coordination, and control to minimize cost. The study was done in Bengkalis Distric, Riau. The ...