| 1. | Method of test for organic nitrogen in paper and paperboard
纸和纸板中有机氮试验方法 |
| 2. | Excretion of totai nitrogen by microzooplanklon was 2 . 68mg / ( m ' . d )
20 。总有机氮产生率为2 |
| 3. | Standard test method for organic nitrogen in paper and paperboard
纸和纸板中有机氮的标准试验方法 |
| 4. | Effect of different organic nitrogen sources on inosine biosynthesis
不同有机氮源对肌苷合成的影响 |
| 5. | Soil organic nitrogen compounds and the research of its mineralizable models
土壤有机氮组分及其矿化模型研究 |
| 6. | Advances in studies on dissolved organic nitrogen in terrestrial ecosystems
陆地生态系统可溶性有机氮研究进展 |
| 7. | Contents of soluble organic nitrogen in soil and its influencing factors
土壤中可溶性有机氮含量及其影响因素研究 |
| 8. | Atmospheric organic nitrogen deposition and significance in marine ecosystem
大气有机氮沉降及其对海洋生态系统的影响 |
| 9. | Different forms of organic nitrogen loss in soil by runoff in slope land of loess plateau
黄绵土不同形态有机氮径流流失规律 |
| 10. | Fertilizers . nitrogenous fertilizers containing synthetic organic nitrogen . determination of the types of nitrogen
肥料.合成有机氮中氮肥含量的测定 |
