查询词典 crop rotation

Proper rotation and use of disease-resistant varieties will help, but sooner or later the old garden spot becomes so full of various disease spores and nematodes that you cannot grow a good crop of many vegetables without use of special soil fumigants.

适当的轮换和使用抗病品种会有所帮助，但迟早旧花园现场变得如此充满各种疾病孢子和线虫，你不能生长良好的作物，许多蔬菜未经使用特殊的土壤熏蒸。

Annual rotation of a winter crop with the summer rice is a common agricultural practice in Chekiang province.

在水稻与紫云英轮作的土埌中，直徑为1—5毫米的团粒含量有显著的增加。

Soil acidification, as influenced by N-fertilizer, stubble management and crop rotations, was investigated using soil samples from a long-term rotation trial at Tarlee, South Australia.

用南澳大利亚Tarlee地区一个长期田间试验的土壤样品研究了轮作措施、氮肥施用和残茬管理对土壤酸化的影响。

In order to promote the application of organic manure and chemical fertilizer in the rotation of Flue-cured tobacco rationally, the effect of different organic manure (crop straw, oil cake, fully-fermented pig manure) applied in preceding crops on availability of nitrogen fertilizer was studied by the methods of pot and micro plot experiment in field, using the Isotope 15N trace technique.

为进一步促进烤烟轮作周期内有机肥和氮肥的合理施用，采用田间微区试验和田间小区试验相结合的方法，应用稳定性同位素15N示踪技术，研究了前作施用有机肥对烤烟氮肥效应的影响。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。