采用312-D最优饱和设计，开展了春玉米水肥耦合作用田间试验研究。
With 312-d optimized saturation design, field experiment was conducted to study yield effect of water and fertilizer coupling on spring maize.
通过配方设计、田间试验、实验室试验确定了包裹型玉米口肥（类似于种肥）生产的相关要素。
Relevant essential factors in the production of an encapsulated grain fertilizer (similar to seed manure) are ascertained through formulation, field test and laboratory experiments.
运用农业系统工程原理，采用二次回归正交旋转组合设计进行田间试验。
The field experiments were carried out by using the principle of agricultural systems engineering and the modular design between quadratic regression and positive rotation.
通过样机的田间试验可知，该机能较好地满足田间作业的技术要求，进而为秸秆粉碎还田机的设计及研究提供参考。
The prototype field experiments showed that it can better meet the technical requirements of field operations, providing reference for design and research of straw choppers.
在此基础上设计出了新型的搂齿机构。并通过田间试验取得了满意的结果。
Through analgsing the moving course of spring tine mechanism for collecting cereals, a new type rake tine mechanism is designed, showing satisfactory result in field experiments.
在此基础上设计出了新型的搂齿机构。并通过田间试验取得了满意的结果。
Through analgsing the moving course of spring tine mechanism for collecting cereals, a new type rake tine mechanism is designed, showing satisfactory result in field experiments.
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