Chemical Characteristics of Irrigation Water and its Suitability for Soil and Agricultural Crops in Singosari District, Malang Regency, East Java, Indonesia

Abstract

The irrigation water should be available not only in adequate quantity but also of good quality. The quality of irrigation water is as important as soil fertility. The aim of this research is to characterize irrigation water based on chemical aspects and its suitability for soil and agricultural crops. Water chemical characterization was carried out using the Piper Trilinear Diagram model. Assessment of the suitability of irrigation water use for soil and crops is carried out using the Irrigation Water Quality Index model. The chemical characteristics of irrigation water at the research location are that it has a soil alkali content exceeding the alkali content, a weak acid content exceeding the strong acid content, and a carbonate hardness of more than 50%. The irrigation water quality index value is in the range of 70–85 with a low water use restriction category. Irrigation water in this category can be used on soil with a light texture/medium permeability and should be avoided on crops that are sensitive to salt.

Keywords: chemical characteristics, crop, irrigation, soil, water quality.