Open AccessEvaluation of Uniformity Coefficient and Soil Moisture Distribution under Drip Irrigation System
Author(s) -
A. Selvaperumal,
E. Sujitha,
I. Muthuchamy
Publication year - 2019
Publication title -
current journal of applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2457-1024
DOI - 10.9734/cjast/2019/v34i530170
Subject(s) - drip irrigation , fertigation , soil gradation , irrigation , distribution uniformity , water content , mathematics , environmental science , randomized block design , moisture , crop coefficient , hydrology (agriculture) , soil science , agronomy , soil water , statistics , materials science , geotechnical engineering , geology , composite material , biology
Drip irrigation system uniformity can preserve a higher crop yield and deplete the initial investment of cost. The experiment was conducted at precision farming development centre research farm, Tamil Nadu Agricultural University, Coimbatore, to evaluate the uniformity coefficient and soil moisture distribution under drip irrigation system. The experiment was designed under Factorial Randomized Block Design (FRBD) which included three fertigation levels 80%, 100% and 120% of Recommended Dose of fertilizers which were replicated thrice. The Coefficient of Variation (CV) was obtained as 0.0207 per cent kept at a constant pressure of 50.66 kPa, Statistical Uniformity (SU) as 97 per cent and Coefficient of Uniformity (CU) as 0.9518. As the elapsed time increased, the rate of increase of wetted zone diameter decreased. A high R2 value of 0.97 shows the goodness of fit for the horizontal movement. The mean soil moisture distribution 39.2 per cent was observed below the emitter at the depth of 10 cm immediately after irrigation.