Plastic mulch and irrigation boost apple-soybean yields in China.
Mulch and irrigation can improve water distribution and crop yield in apple-soybean intercropping. Plastic mulch and higher irrigation levels increase soil water content, root density, and crop yield. Straw mulch leads to more competition between apple trees and soybeans. Plastic mulch with 70-85% irrigation is best for higher yields and water use efficiency in this intercropping system.