他可能放弃控制权。
Control production cost, improve yield and output, quality.
控制生产成本，提高出材率及产量，质量。
Chemical control is an important technology to increase soybean yield.
化控是大豆一项重要的增产技术。
Wheat yield of all above practices are remarkable high than control treat.
以上处理组合均极显著地高于对照处理。
Wheat yield of all above practices are remarkable high than control treat.
以上处理组合均极显著地高于对照处理。
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