Second, yield growth has been lower in wheat and rice than in corn and soyabeans.
其次，小麦和水稻的产量增长一直低于玉米和大豆。
Effects of rice straw covering net on soil erosion and wheat yield were studied with self-designed soil erosion boxes under simulated rainfall.
通过自制土壤冲蚀槽，并进行人工模拟降雨试验，研究了稻秆编织地表覆盖物对坡地土壤侵蚀和小麦产量的影响。
The effect of applying N-fertilizer or not in wheat on soil fertility and grain yield and fertilizer-N use efficiency (FNUE) of rice in the wheat-rice cropping system were studied.
通过对前茬作物小麦设置施用氮肥与不施用氮肥处理研究它对土壤肥力及后茬作物水稻产量和氮肥利用率的影响。
The results showed that the PBDZ could significantly increase rice and wheat yield.
结果表明：PBDZ栽培能显著提高稻麦产量。
Scientists were successful in breeding high-yield types of wheat and rice.
科学家们成功地培育出高产的小麦和水稻品种。
Moreover, prolonging rice growth duration and developing large panicles improved annual grain yield of rice and wheat.
延长水稻生育期和攻取大穗是稻麦周年高产的关键。
Field trials show: compared with common NPKs, specialty fertilizers increase the yield of wheat by 5.9%, rape seed by 7.2%, rice by 7.3%, vegetable by 9.1%, and the application frequency is decreased.
田间试验表明：施用腐植酸系列专用肥与普通复混肥相比，小麦平均增产7.2%，油菜平均增产7.2%，水稻平均增产7.3%，蔬菜平均增产9.1%，且可减少施肥次数。
Field trials show: compared with common NPKs, specialty fertilizers increase the yield of wheat by 5.9%, rape seed by 7.2%, rice by 7.3%, vegetable by 9.1%, and the application frequency is decreased.
田间试验表明：施用腐植酸系列专用肥与普通复混肥相比，小麦平均增产7.2%，油菜平均增产7.2%，水稻平均增产7.3%，蔬菜平均增产9.1%，且可减少施肥次数。
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