| 1. | Characteristics of nutrient balance of different cropping systems in paddy field of red earth
红壤稻田种植制度的养分平衡特征 |
| 2. | Harvest date may be moved up by 7 - 21 days depending on the cropping system and environmental conditions
收获期依种植制度和环境条件，可提前7 ~ 21天。 |
| 3. | In many upland situations , however , only perennial tree based cropping systems will allow sustainability
然而在许多热带旱地上，只有以多年生树为主的种植制度才具持续性。 |
| 4. | It becomes obvious that nutrient inputs significantly influence the rates of economic return in upland cropping systems
显而易见，养分投入显著影响旱地种植制度下的经济收入。 |
| 5. | Until recently the fertilization practice has been for a single crop , even though the sequential cropping system has been followed
即使已采用了连作种植制度，但是直到最近还是只对一种作物进行施肥。 |
| 6. | Jin et al . ( 1990 ) has used this systematic approach successfully in guiding maximum yield research in wheat - corn double cropping systems
金继运等人1990年用该方法成功地指导了小麦-玉米一年两熟种植制度的最高产量研究。 |
| 7. | In the final analysis , mey cropping systems provide protection for water resources and preservation of the soil ' s ability to produce food and fiber
最后分析最大经济产量种植制度如何保护水资源和保持土壤生产衣食的能力。 |
| 8. | It is apparent that a high degree of ammonia volatilization and / or nitrate leaching can occur in cropping systems susceptible to previously described conditions
很明显，高的氨挥发和(或)硝态氮的淋失会发生在符合上述条件的任何种植制度中。 |
| 9. | Thus there should be studies for finding an optimal fertilizer schedule based on a cropping system including intercropping systems rather than for a single crop only
因此，应该研究包括间作在内的种植制度而不仅为某种作物寻找合适的施肥方案。 |
| 10. | The nutrient balance in different kind of crops and cropping systems , as well as the nutrient input of different farmers were similar pattern with quzhou county
不同作物和种植制度的养分平衡情况及不同农户的养分投入情况与曲周县的整体情况大体一致。 |
