The Effect of Irrigation and Manganese Foliar Treatments on Dry Matter Production in different parts of Soybean plants

The effects of withholding irrigation and manganese foliar treatments on dry matter production in soybean cultivars was studied in Kermanshah, Iran in 2010 growing season. The experimental design was a split split plot based on Randomized Complete Block design with three replicates. Treatments includes: two irrigation regimes, two manganese foliar treatments, and eight soybean cultivars. At the end of growing season, leaf area and dry weight of soybean shoots were determined. Manganese foliar application in withholding irrigation treatment at flowering stag had a slight effect on leaf area index. In addition, stem dry weight of Pershing and Clark cultivars further increased with manganese foliar application at regular irrigation compared other investigated cultivars. Furthermore, Leaf dry weight decreased with withholding irrigation, and increased with manganese foliar application. The results were shown that irrigation treatments had more effect on grain dry weight of soybean plants compared the manganese foliar application.