在试验田上设置与排列试验小区的方法。包括制订试验处理方案和试验小区设置方案，以及相应的资料搜集、整理和分析等，以便估计出无偏的、最小的试验误差，作为评价试验处理的依据。
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.
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