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.
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。
Her results show that reducing emissions is more complicated than just cutting back on nitrogen fertilizers and changing crop rotation cycles.
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。
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.
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。
The four crops grown in rotation are corn, soybean, wheat, and alfalfa, with one crop grown each year during the 4-year cycle.
此次田间试验的目的，是研究这一方法能在多大程度上防止由于精细的作物轮作所产生的土壤退化。
The aim of the field experiment was to investigate to what extent such a system could prevent soil degradation resulting from very intensive crop rotations.
《犁的纪念碑》形为一三角状地块，每边宽一英里，以轮作方式在每个边种植季节性作物，象征翻耕，播种，收割，翻耕的循环。
"Monument to the Plow" called for a triangular site a mile wide on each side to be planted with seasonal crops on rotation: ploughed, sown, harvested, ploughed, etc.
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。
How to evaluate crop rotation level in large geographic area is one of the most important problems in agricultural production.
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。
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.
豌豆是甘肃中部干旱地区重要的轮作、粮食和饲料作物。
The pea is an important rotation food and a forage crop in the central arid region of Gansu.
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。
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.
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。
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.
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。
Crop rotation: the successive planting of different crops on the same land to improve soil fertility and help control insects and diseases.
在黄土丘陵区要求林草与农作物地在轮作周期内的总耗水量与有效雨量（降雨量与径流深之差）持平。
It is necessery that the total consumptive use of water in the rotation period is equal to the total effective precipitation(pre- cipitation minus runoff depth)in the loess hilly region.
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。
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.
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。
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.
单一做法，可以将复种轮作系统的使用，边界，覆盖作物。
Monoculture practices can incorporate multiple cropping systems by using rotations, borders, and cover crops.
单一做法，可以将复种轮作系统的使用，边界，覆盖作物。
Monoculture practices can incorporate multiple cropping systems by using rotations, borders, and cover crops.
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