Soil-water- versus ET-based irrigation scheduling of drip-fertigated maize: production, water productivity and profitability under three nitrogen rates

Description

The objective of this study was to quantify the effect of different irrigation scheduling methods (ISM) and variable N fertilizer applications on total aboveground biomass (TB), grain yield (GY), irrigation water productivity (IWP) and the economic performance of maize in semi-arid conditions. The experimental treatments consisted of three N rates (N0: no N; N1: 150 kg N ha−1; N2: 300 kg N ha−1) and two irrigation scheduling methods including a traditional, evapotranspiration-based schedule (ETM) and a precision, soil-water-based schedule (SWM). Six treatments were arranged in a randomized complete block design with three replications for two years. Soil water content was measured using the gravimetric method

Steps to reproduce

This dataset originates from a two-year field experiment (2014–2015) conducted to evaluate irrigation scheduling (ETM vs. SWM) and nitrogen application (N0, N1, N2) on maize. The study used a randomized complete block design (RCBD) with three replications. Soil moisture was monitored using the gravimetric method. Plant growth parameters (TB, LA, height) and yield components (GY) were measured throughout the growing season. Irrigation Water productivity (IWP) and economic Indicators (EWPI) were calculated based on the recorded irrigation amounts and market prices. All statistical analyses were performed to determine the significance of ISM and N interactions.

Institutions

• Isfahan University of Technology

  Isfahan, Isfahan

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