| 1. | Some commercial laboratories use periodic nitrate nitrogen tests as guides .
许多商业性的试验室已应用定期的硝态氮分析作为指导。 |
| 2. | In many plants, including most tree crops, nitrate nitrogen does not usually occur in the leaves .
在一些植物中，包括绝大多数的木本作物，硝态氮并非经常存在于叶片中。 |
| 3. | Determination of nitrate nitrogen in forest soil
森林土壤硝态氮的测定 |
| 4. | Characteristics of nh4 and no3 - uptake by rices of different genotypes
不同水稻品种对铵态氮和硝态氮吸收特性的研究 |
| 5. | Fertilizer - determination of nitrate nitrogen content - nitron gravimetric method
肥料中硝态氮含量的测定氮试剂重量法 |
| 6. | Determination of nitric nitrogen in soil extracts by dual wavelength spectrophotometric method
双波长分光光度法测定土壤硝态氮 |
| 7. | After urea application , there are more nh4 + than no3 - in the water surface
尿素施用后，田面水中以铵态氮为主，硝态氮比例较少。 |
| 8. | Influence of nitrate - n space time differentiation to ch . cabbage nitrate content in black soil
黑土土壤硝态氮时空变异对蔬菜硝酸盐含量的影响 |
| 9. | The concentrations of ammonia and nitrate in water - sediment interface varied seasonally
水沉积物界面氨氮和硝态氮含量呈现明显季节性变化。 |
| 10. | Chemical analysis of sulphuric acid and oleums . determination of nitrous nitrogen and nitric nitrogen
硫酸和发烟硫酸的化学分析.硝态氮的测定 |
