Our objective was to explore why Sesamum indicum yield declined severely when planted after Rehmannia glutinosa in crop rotation.
我们的目的是探索为什么在熟地黄轮作中种植地黄后，芝麻的收成会急剧下降。
A rotation of personnel; crop rotation.
员工的轮流替换；
Crop rotation helps prevent soil erosion.
农作物轮作有助于防止水土流失。
Crop rotation is the best way to increase output.
想提高产量，最好的办法是倒茬轮作。
After several years of crop rotation, the land became infertile and needed to be supplemented with organic matter.
土地经过多年轮种变的贫瘠，需要补充有机质。
Recently, with change of crop rotation and climate, wheat Scab was extended and aggravated among the areas in China.
近年来，随着轮作制度的改变和气候的变迁，我国部分小麦产区赤霉病呈蔓延加重趋势。
Other organic tactics for boosting soil quality include cover crops (aka "green manure"), crop rotation and composting.
其他增大土壤肥力的策略包括作物肥田(亦作“绿肥”)、轮种和堆肥。
How to evaluate crop rotation level in large geographic area is one of the most important problems in agricultural production.
评估大地理区域内作物轮作水平是农业生产中必须解决的重要问题之一。
The results showed that light fraction C and N pools of the alfalfa-crop rotation systems were higher than in alfalfa grassland.
结果表明，土壤轻组有机碳和氮含量苜蓿-作物轮作系统高于苜蓿草地。
Crop rotation is a simple and effective technique used in organic agriculture to reduce the need for pesticides and improve soil fertility.
轮作是应用于有机农业上的一种简单而有效的技术，能减少农药的使用和提高土壤肥力。
Aims Our objective was to explore why Sesamum indicum yield declined severely when planted after Rehmannia glutinosa in crop rotation.
通过分离地黄（Rehmannia glutinosa）组织中抑制芝麻（Sesamum indicum）生长发育的化感物质，以弄清地黄茬种植芝麻造成芝麻严重减产的原因。
Her results show that reducing emissions is more complicated than just cutting back on nitrogen fertilizers and changing crop rotation cycles.
她的研究结果表明，减少排放要比只是减少氮肥的使用和改变作物轮作周期复杂得多。
The second most common crop, soybeans, yields a lower return but crop rotation is necessary to keep the soil in shape for bounteous corn yields.
其次最常见的农作物，大豆，回报低，但轮作是必要的用以保证土壤能够拥有宽裕的玉米产量。
Crop rotation: the successive planting of different crops on the same land to improve soil fertility and help control insects and diseases.
轮作：在同一块土地上连续种植不同的作物以提高土壤肥力并帮助控制昆虫的生长和疾病的蔓延。
The nitrogen contents and nitrogen forms were studied in albic soil with longterm crop rotation and soybean, maize, wheat continuous cropping.
对轮作及大豆、玉米、小麦长期连作白浆土中氮含量及有机态氮组分变化进行研究。
But the system has also encouraged farmers to alter time-honored crop rotation practices and the mix of herbicides that previously had kept weeds in check.
但是该体系鼓励农民改变长期以来的轮作制度和混合使用除草剂，在以前这些方法很好的控制了杂草。
The result showed, comparing with sole cropping, the land use efficiency of sequential cropping, row cropping, crop rotation raised by 62%, 38% and 21%.
结果表明，与单作一熟农田相比，复种、间作及轮作农田土地利用效率分别提高62%、38%和21%；
He practiced crop rotation and soil conservation a century before these became standard practice and he invented a plow superior to any other in existence.
在人们普遍利用农作物轮作和土壤保持的作法前一个世纪，他就这样做了。
Between 1000 and 1300 Europe's urban population more than doubled, to about 70m (thanks partly to a new system of crop rotation, made possible by better tools).
公元1000年和1300年间，欧洲城市人口翻了一倍多，达到7千万人(与改良工具后人们运行了新式的轮作系统有关)。
He practiced crop rotation and soil conservation a century before these became standard practice, and he invented a plow superior to any other in existence.
在人们普遍利用农作物轮作和土壤保持的作法前一个世纪，他就这样做了。
The location tests of different blend ratio between controlled-release urea and conventional urea in wheat-corn crop rotation system in Xinpo Village Zhumadian city are studied.
在驻马店新坡村进行了小麦一玉米轮作制下的控释尿素与普通尿素掺混比例定位试验研究。
Using traditional techniques such as crop rotation, compost and manure to supply the soil with nitrogen and other minerals would have required a tripling of the area under cultivation.
如果采用传统技术如轮作和堆肥为土壤补充氮和其他物质，就需要耕地也增长三倍了。
But he found out that working these so-called walking wetlands into his farm's regular crop rotation can increase levels of crop-boosting nitrogen and drown disease-causing bacteria.
但是他发现在他农田中搞所谓“湿地流转”的作物轮作可以增加土地氮含量并杀死引起疾病的细菌。
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。
Appropriate sowing date helped improve productivity with respect to key inputs, while appropriately delayed crop rotation was awarding to annual economic productivity of rice and wheat.
适期播种有利于提高稻麦周年的一些关键性投入的生产力，适当延迟稻麦换茬时间可以提高稻麦周年经济生产力。
We analyse soils according to the size of the particles and the size of the particles determines to a great degree the different tillages crop rotation and different crops to be grown on the soil.
我们根据土粒的大小来分析土壤，而且，土粒的大小在很大程度上决定着土地的耕作方式，农作物的轮作和种植的作物的种类。
We analyse soils according to the size of the particles and the size of the particles determines to a great degree the different tillages crop rotation and different crops to be grown on the soil.
我们根据土粒的大小来分析土壤，而且，土粒的大小在很大程度上决定着土地的耕作方式、农作物的轮作和种植的作物的种类。
We analyse soils according to the size of the particles and the size of the particles determines to a great degree the different tillages crop rotation and different crops to be grown on the soil.
我们根据土粒的大小来分析土壤，而且，土粒的大小在很大程度上决定着土地的耕作方式、农作物的轮作和种植的作物的种类。
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