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通过“八五期间试验，在渭北旱原：（１）优势作物是红薯和花生。干旱年、平水年二者均有较高经济效益。玉米的种植，生育期降雨不足４００ｍｍ时不可种植。烤烟，棉花效益不好，近年不宜扩大。中药材具有一定开发潜力；（２）对作物产量影响较大的处理是麦草覆盖、增施农肥和豌豆轮作等项措施；（３）本试验水分生产率最高、耗水系数最低的轮作制是：玉米→玉米→玉米和（小麦＋绿豆）→（玉米＋大豆）→小麦。在不同轮作制同一个周期里，玉米生产潜力最大（干旱年例外），其次依次是小麦豌豆，油菜，绿豆和大豆；（４）蒸发量最大是（小麦＋绿豆）→（玉米＋大豆）→小麦，最小是玉米→玉米→五米和麦草覆盖等轮作处理。夏收后在休闲期，以麦草覆盖增补水最多，油菜裸露地最少；（５）油菜、莞豆是理想的肥地作物，应予推广。
Adopted during the Eighth Five-Year Plan Period test in Weibei: (1) The dominant crops are sweet potato and peanut, which are both economically and economically effective in both dry and flat years, and can not be planted when the rainfall is less than 400 mm for maize. Flue-cured tobacco and cotton are not good, and should not be expanded in recent years.Chinese medicinal herbs have some potential for development; (2) The treatments that have a great impact on crop yield are wheat straw coverage, agroforestry and pea rotation; (3) The water productivity The highest crop rotation system with the lowest water consumption coefficient is: Maize → Maize → Maize and (wheat + mung bean) → (Maize + Soybean) → wheat. Maize has the highest potential for production in the same cycle (except for drought) Followed by wheat, pea, rape, mung bean and soybean; (4) the maximum evaporation is (wheat + mung bean) → (corn + soybean) → wheat, the smallest is corn → corn → five meters and wheat straw cover rotation processing. In the leisure time, wheat straw covered up to the water, rape bare the least; (5) rape, cantaloupe is the ideal fertilizer crops should be Promotion.