He grew a different crop on the same field five years in a row, what researchers call crop rotation.
他连续5年在同一块地上轮流种植不同作物，研究人员称之为轮作。
Equally crucial is lower-tech research into basics such as crop rotation and mixed farming of animals and plants on small farms.
同样重要的是，开展对基础知识的低端技术研究，如庄稼轮作，在小型农场中发展动植物混养。
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。
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)。
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 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。
We'd sing songs about crop rotation and vomiting babies, and we'd sit down at rock concerts.
所有的情歌都会消失，我们会唱关于农作物季节变迁和呕出婴儿，我们都在石头上在听演唱会。
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。
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。
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。
The four crops grown in rotation are corn, soybean, wheat, and alfalfa, with one crop grown each year during the 4-year cycle.
轮作的四种作物是玉米、大豆、小麦和苜蓿，四年内每年种植一种作物。
In one set of plots, she is comparing the traditional 2-year, wheat-fallow rotation with a 3-year cycle of no-till winter wheat, followed by a second crop of no-till winter wheat, followed by sorghum.
在第一组试验田中，她正在比较传统的两年制小麦休耕轮作制和三年轮作制，即首先种植免耕冬小麦，第二季种植免耕冬小麦，然后种植高粱。
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 pea is an important rotation food and a forage crop in the central arid region of Gansu.
豌豆是甘肃中部干旱地区重要的轮作、粮食和饲料作物。
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.
他练习作物轮作、水土保持一个世纪之前，这些被成为标准的做法，他发明了一种犁优于其他任何存在。
Sugar cane and rice, sweet potatoes, beans or jute, crop rotation, can greatly reduce suffer.
甘蔗和水稻，甘薯，豆类或黄麻等作物轮作，可以大大减轻受害。
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。
The data also indicated that it can be used in cultivating forest seedlings, growing vegetables and flowers to inhibit soil nematodes in the soil by row intercrop- ping, crop rotation and grafting.
表明该品种可以用来在种植林木苗木、蔬菜、花卉等作物时，通过间作、换茬和嫁接等方法控制土壤线虫。
Some geometrical image transform such as scale expanding, scale reducing, rotation, crop etc. were afforded.
实现了图象文件的放大、缩小、旋转、裁剪等几何操作；
Winter wheat yield was more sensitive to rainfall and spring maize yield more influenced by previous crop stubbles in rotation system.
在轮作条件下，冬小麦的产量更容易受到降水的影响，而春玉米的产量更容易受茬口的影响。
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。
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。
The results of experiment proved that this algorithm is invisible, can efficiently against linear stretching attack, and has better robustness to crop, rotation, noise or filter attack.
实验结果表明，该算法具有较好的不可感知性，可以有效抵抗线性拉伸攻击，并且对于剪切、旋转、噪声，滤波等攻击都具有较强的鲁棒性。
A rotation of personnel; crop rotation.
员工的轮流替换；
Paddy-upland rotation is a main crop cultivation systems and has an important position in ensuring crops stable yield, maintaining high yield and improving planting economic benefit in China.
水旱轮作是我国重要的作物种植系统，在确保作物稳产、高产和提高种植业经济效益方面具有重要的地位。
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。
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。
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