Author(s):

A Bharathi, T Ragavan, V Geethalakshmi, A Rathinasamy and Dr. R Amutha

Abstract: A field experiment was conducted during summer 2017 on sandy clay loam soil at irrigated upland farms of Tamil Nadu Agricultural University, Coimbatore to study the effect of deficit irrigation practices through drip system on nutrient uptake of maize crop. In the present study, PRD and deficit irrigation (DI) concepts (creation of soil moisture gradient) were implemented through alternate deficit irrigation (ADI) at two levels of irrigation having full and partial application at 60, 80 per cent, and four critical stage based PE as well as ET_c based levels using drip system, comprised of seven irrigation levels. Higher growth and grain yield (75711 kg ha^-1) was recorded with plots irrigated with CDI at IW/CPE of 0.75 due to superior growth and higher nutient uptake. Application of 80 and 60 per cent ET_c as ADI produced next better yield and uptake among the deficit practices which was on par with a regulated deficit irrigation of 80 per cent as PE based approach.

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