以下为句子列表：
英文: A field representative to the high production -region in Yutian county, Hebei province was selected and a 70 kg top layer soil sample was taken from the field in June, 1991.
中文: 在河北省玉田县高产地区选一个有代表性的地块，1991年6月麦收后采集70公斤的耕层土样。
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英文: A one kilogram sub-sample was taken for chemical analysis and adsorption study, and the rest of the soil sample was stored for greenhouse experiment.
中文: 从大土样中取出1公斤用于化学分析和吸附研究，剩于土样贮存用作温室盆栽试验。
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英文: Chemical analyses of the soil sample and adsorption study indicated that the soil was low in N, K, S and Zn, and that the soil had high adsorption capacities to P, K and Zn.
中文: 土壤样品的化学分析和吸附研究表明该土壤氮、钾、硫和锌的有效含量较低，土壤对磷、钾和锌有较强的吸附能力。
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英文: For this purpose, a systematic approach for soil nutrient status study was developed, which consists of five steps: (1) proper sampling and sample preparation, (2) basic analysis of soil sample for availability of 11 essential nutrients, (3) adsorption of
中文: 为此目的，我国有关专家新近旨进了一套研究土壤养分状况的系统方法，该方法分五个步骤：（1）正确的采样和样品制备；（2）土样中11种必需营养元素速效含量的测定；（3）土壤对主要养分的吸附；（4）验证养分限制因子的温室研究；（5）田间试验。
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英文: Generally speaking, the big primary soil sample collected in shaft is the true primary state soil sample, the sample collected by soil collected equipment in drilling is of different degree disturbance.
中文: 一般认为竖井中采取的大块土样，是“真正”的原状样，钻孔中使用取土器采取的原状样存在不同程度的扰动。
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