有一项研究，在美国对于玉米与大豆轮作的11处土壤进行了研究。
One study examined 11 soils in the US under a rotation of maize and soybeans.
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.
采用合理轮作，深翻土壤，宽行条播并辅以优学方法可以减轻以致根除菟丝于对大豆的危害。
It was possible to decrease of exclude the harm of cuscuta on soybean with a proper rotation, deep soil, broad row drilling and chemcial method.
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 nitrogen contents and nitrogen forms were studied in albic soil with longterm crop rotation and soybean, maize, wheat continuous cropping.
六年试验结果表明：大豆产量轮作高于连作。
The research showed that rotation of soybean gave higher yield that of continuous cultivation in six years.
采用田间与盆栽试验方法研究了大豆专用复混肥对轮作、连作大豆抗逆性的影响。
Effects of soybean specific fertilizer on adverse resistance of soybean in rotation and soybean continuous cropping were investigated by pot and field plot experiments.
本论文报道了连作、轮作大豆根际土壤微生物区系变化、土壤真菌优势类群、连作大豆根际土壤真菌优势类群紫青霉菌毒素的理化特性及其作用的研究结果。
In this paper, the changes of soil microbial community by soybean continuous cropping , dominant fungi, phytotoxins produced by P. purpurogenum and it's toxicity to soybean was reported.
运用倒置“W”9点取样法，对黑龙江省北部大豆小麦轮作区小麦田做杂草调查。
Wheat field weed survey was conducted using an inverted W-pattern with 9 sampling points in the north region of Heilongjiang province.
通过田间试验及室内分析相结合的方法，研究了大豆专用复混肥对轮作、连作大豆氮、磷、钾营养及产量的影响。
The paper studied the effect of complex fertilizer to yield and nutrtion of nitrogen, phosphorus and potassium of soybean in this experiment.
通过田间试验及室内分析相结合的方法，研究了大豆专用复混肥对轮作、连作大豆氮、磷、钾营养及产量的影响。
The paper studied the effect of complex fertilizer to yield and nutrtion of nitrogen, phosphorus and potassium of soybean in this experiment.
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