A master's thesis at the University of Kirkuk discusses the effect of moisture depletion at two tillage depths and emitter types in maize.

A master's thesis was discussed at the College of Agriculture on the effect of moisture depletion at two tillage depths and emitter types on some physical properties of the soil, growth, and yield of maize.
The study, presented by the student Mustafa Mohammed Mustafa, aimed to identify the impact of tillage depth and moisture depletion percentage on some soil physical properties, evaluate the performance of two types of emitters before and after maize cultivation, study the interaction between tillage depth, moisture depletion, and emitter type on soil and crop characteristics, and estimate field and crop water productivity for maize.
The study concluded that 45% moisture depletion gave the lowest bulk density, highest total porosity, weighted mean diameter, and saturated hydraulic conductivity, in addition to higher plant height and grain yield compared to 65% depletion. A tillage depth of 30 cm achieved better values for plant height, stem diameter, leaf area, and biological yield. The evaluation of drip irrigation hydraulic parameters before and after the experiment showed the superiority of the GR emitter in maintaining performance.