| 1. | Improvements in drainage and fertility levels are in themselves methods of reducing the incidence of some of these weeds .
改进排水和肥力水平本身就是减少某些杂草生长的方法。 |
| 2. | Building modern fertility culture and stabilizing low - fertility level
建设现代生育文化与稳定低生育水平 |
| 3. | Stabilizing low fertility level and establishing social security system in rural china
政策过程中的公关思考 |
| 4. | On family planning administrative law - enforcement under the condition of low fertility level
低生育水平条件下计划生育行政执法探讨 |
| 5. | Improvement in fertility level and in social status of chinese women in contemporary times
新时期中国妇女生育水平与社会地位的发展与变化 |
| 6. | Humus composition of black soil and its organo - mineral complexes under different fertility level
不同肥力条件下黑土及其有机无机复合体的腐殖质组成 |
| 7. | The activity of phosphatase in soils went up with the increase of fertility levels and lowered with the deepening of soil layers
土壤磷酸酶活性随肥力水平的提高而提高，随土层深度的加深而下降。 |
| 8. | The phosphorus activation coefficient ( pac ) was generally lower in different soil layers and at different fertility levels in calcareous soils
石灰性土壤中磷素活化系数pac在不同肥力土壤和不同土层中普遍较低。 |
| 9. | There were significant differences among the amounts of soil p and its fractions of inorganic p ( pi ) and organic p ( po ) at three fertility levels
不同肥力土壤中磷素含量及其无机和有机组分有显著差异。随着土壤肥力由低到高，土壤中总磷量呈上升趋势。 |
| 10. | The analysis shows that although the village has been in low fertility level for so long time , the low fertility is still unstable
文章考察了自发性控制力、诱导性控制力和强制性控制力在维持东村人口低生育水平的作用机制，并得出东村的低生育水平仍然不稳定的结论。 |
