1.
Farmers rotate their crops so that the soil will remain fertile.
为保持土壤肥力, 农民搞作物轮作。
2.
The Influence of Rotation Between Amaranthus spp. and Grain Crops on Soil Fertility and Cultvate Characters of Rotative Plants
籽粒苋与粮食作物轮作对土壤肥力及作物栽培性状的影响
3.
Crop rotation and soil conservation: Farmers of forty centuries and permanent agriculture in China,Korea and Japan, 1911
作物轮作与水土保持:《四十世纪的农民》与新政农业政策
4.
The Importance of Green Manure Cover Crops and Crop Rotation in the No-tillage System -- Experiences in the development of the No-tillage System in Brazil and Paraguay
绿肥作物轮作覆盖在免耕中的重要性——巴西和巴拉圭免耕发展经验
5.
Farmers rotate crops in the fields.
农民在耕地上轮栽农作物。
6.
Corn or soybean are planted as a rotation crop after three years of cotton.
玉米和大豆是棉花种植3年后的轮作作物。
7.
Alternate strips planted to crops each year serve as windbreaks for the fallow strip.
每年播种作物的轮种带可用作休耕带的防风林。
8.
Rotation Crop Evaluation for Management of the Soybean Cyst Nematode
轮作植物对大豆胞囊线虫抑制作用的研究
9.
Dynamic changes of soil enzyme activities during growth of corps under different tillage types and rotations
不同耕作和轮作方式下作物生育期内土壤酶活性的动态变化特征
10.
Characteristics of turnover and soil microbial biomass in meadow brown soil under different rotation and tillage systems
不同耕作和轮作下潮棕壤微生物生物量及周转特征
11.
Microbial Ecological and Crop Effects and Diagnostic Index of Copper Pollution in Grain-Vegetable Rotation Ecosystems;
粮—菜轮作系统铜污染的作物和土壤微生物生态效应及诊断指标
12.
three field system
三区[轮作]制, 三圃农作制
13.
Situation in which people frequently take turns to have sth, esp a job
靠轮流才获得某事物的情形（尤指获得工作）
14.
Adopt soft idler wheel of lower placement to encure the even cement.
采用下置式上胶软滚轮，确保工作物上胶均匀。
15.
Studies on the Relationship between Defense Substance and Pathogen of Ring Rot Disease on Ya Pear;
鸭梨果实抗性物质与轮纹病菌互作关系研究
16.
Microbial Characters in No-tillage Soil with Paddy-upland Rotation;
水旱轮作条件下免耕土壤微生物学特性研究
17.
Control Efficacy of Rotation and Bio-fumigation Against Strawberry Replant Diseases
轮作与生物熏蒸配合防治草莓再植病害的研究
18.
The effect of a mineral additive in lubricating oil on wear performance of gear
矿物质润滑油添加剂对齿轮作用效果的研究