field plot experiment meaning in English

田间小区试验

The disease resistance of 72 varieties ( or lines ) of wheat to wheat scab in qinghai existing agricultural production has been identified by field plot experiment at present for two years
摘要两年来，通过田间小区试验，对青海省当前生产上已有的72个小麦品种（系）进行了赤?病抗性鉴定。
The content of fixed ammonium , capacity of fixing - ammonium , available fixed ammonium , kinetics of ammonium fixation and release of fixed ammonium of chief upland cultivated soils in hunan province were studied by using the method of field investigation and sampling , laboratory incubation and analyses . the seasonal change of fixed ammonium content in soil and _ its bioavailability in different growth stage of huanghuacai by use of field plot experiment
本文通过野外调查取样、室内培养试验和分析测定，研究了湖南省主要旱耕地土壤的固定态铵含量、固铵容量、有效性固定态铵含量以及土壤对铵离子的矿物固定和土壤固定态铵释放的动力学特性，通过田间小区试验，研究了不同施肥结构下土壤固定态铵在黄花菜生长期间的动态变化规律及其生物有效性。