2017 Southern Illinois Soybean Water Management Study - Sub-Irrigation
The purpose of this study is to evaluate the differences in yield with a sub-irrigation system used to control drainage and irrigation, both with and without moisture sensors.
This plot received over 7 in. of rain within one week of planting. As a result, population differences were observed. Contour tile drainage resulted in increased population and the largest bushel increase in 2017. However, our two-year data has shown that sub-irrigation (especially sensor based) holds the largest advantage, followed by manual sub-irrigation, a controlled water table, and contour drainage.
2-YEAR SUB-IRRIGATION YIELD ADVANTAGE
Planted 4/19/2017 | Harvested 9/14/2017 | Population 140,000 Seeds/A. | Row Width 30 in. | Previous Crop Corn | Tillage Fall: Vertical-Till/In-Line Rip, Spring: Vertical-Till | Herbicides Pre: 1 qt. Authority® Elite, 1 qt. Roundup PowerMAX® Post: 4 oz. Anthem® Maxx, 1 qt. Roundup PowerMAX®, 4 oz. Section® Three | Insecticides Escalate™ | Brand 345R4™* | Soil Type Cisne (Silt Loam) | Soil Test Values pH 7.6, O.M. % 2.6, CEC 11 | Percent Base Saturation Ca 83.9, Mg 12.8, K 3.3, H 0 | Parts Per Million P 110, K 141, S 7, Zn 5, Mn 34, B 0.3
*®XL, Optimum, and AcreMax are registered trademarks of Pioneer. XL® brand seed is distributed by Beck’s Superior Hybrids, Inc.