田间比较试验结果表明，用甲磺隆等磺酰脲类除草剂对日本看麦娘防效很差。
The result of field trials showed that metsulfuron-methyl gave bad control effect against Alopecurus japonicus.
在中国丹阳练湖农场进行的田间试验中，研究和比较了稀疏幼小稻苗生长下测定水稻田氨挥发的三种简化方法。
Three simplified methods for estimating the volatilization of ammonia from flooded rice fields were assessed when the plants are small and sparse in the field at Lianhu Farm, China.
通过半腐解秸秆覆盖旱作、地膜覆盖旱作、裸地旱作比较试验，研究了在田间覆盖条件下旱作水稻的生长发育以及产量形成特征。
Some characteristics of rice cultivated in aerobic soil mulched with semi-decomposed straw and plastic film and without any mulch were compared under field conditions.
田间试验则由于现场条件复杂多变，相关研究比较薄弱。
Field trials are complex and changeable for field conditions, research is relatively weak.
通过田间小区试验，比较了5种微生物菌肥对烤烟的效应。
The effects of five kinds microbial fertilizer on tobacco were studied by plot trial.
通过田间小区试验，比较了5种微生物菌肥对烤烟的效应。
The effects of five kinds microbial fertilizer on tobacco were studied by plot trial.
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