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在陕西渭北旱塬娄土上，采用四因素饱和设计，定位试验５年。结果表明，农家肥具有培肥土壤和促进增产的双重功效；氮、磷化肥合理配施是当前旱地农业生产的重要措施；麦草仅可提高土壤钾素含量。氮肥料效应以氮肥＞农家肥＞磷肥＞麦草。渭北旱塬 土农田合理的肥料结构为亩施农家肥７５００ｋｇ、化肥氮８．４ｋｇ、化肥磷（Ｐ２Ｏ５）８．３ｋｇ，可暂时不施麦草。
Weibei in Shaanxi highland Lou soil, using four factors saturated design, positioning test for 5 years. The results showed that farmyard manure had the dual effect of fertilizing the soil and promoting the increase of yield. The rational allocation of nitrogen and phosphorus fertilizers was an important measure for the current agricultural production in dry land. Wheat straw could only increase the content of potassium in the soil. Nitrogen fertilizer effect with nitrogen> peasant> phosphate> straw. The reasonable fertilizer structure of farmland in Weibei Arid Highland is 7500kg of manure, 8.4kg of fertilizer nitrogen and 8.3kg of fertilizer phosphorus (P2O5).