There is reinfection in field.

鱼腥草紫斑病在田间具多次再侵染.

A way based on machine vision to identify the residue cover rate in field was studied in this article.

以田间照片为对象，研究了一种基于计算机图像处理的田间秸秆覆盖率计算方法。

Studied on the application effect of formula fertilization in field experiment.

在如东县栟茶镇水稻上进行了配方肥料施用效果田间试验。

The dynamic denitrification at the different moisture was studied in field.

通过不同供水水平条件下对田间土壤反硝化作用进行动态研究.

Antibiotics have shown mixed results in field conditions and are used mostly to control secondary infections

田间条件下，抗生素的效果表现不一，主要用于控制继发感染。

Antibiotics have shown mixed results in field conditions and are used mostly to control secondary infections.

田间条件下,抗生素的效果表现不一,主要用于控制继发感染.

Through vibration frequency spectrum analysisof no - tillage seeder in field, its vibration characteristics were obtained.

通过对播种机的田间振动频谱分析, 得到了它的的振动特征.

Through the test in field, prove stable performance of the machine, efficiently weeding, lower rate of injury seedling.

田间试验证明，该机作业性能稳定，杂草除净率高，伤苗率低。

The soil infiltrability is influenced by slopes and soil circumstances in field and the Linear Run-on Method was used to measure soil infiltrability in the field.

为分析坡度和土壤环境对土镶入渗性能的影响，采用线源入流测量法对田间土壤的入渗性能进行试验研究。

The results with the topical application and residual film methods could well represent insecticide resistance in field populations.

点滴法和药膜法的测定结果均能一致反映橘小实蝇田间种群对杀虫剂的抗性水平。