| 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. | 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 |
| 5. | Comparative test on measuring nitrogen content in nitrate nitrogen by reduction
还原法测定肥料中硝酸态氮含量的比较试验 |
| 6. | Fertilizers . determination of nitrate nitrogen content . nitrogen gravimetric method
肥料.硝酸氮含量的测定.氮重量测定法 |
| 7. | Determination of nitrate nitrogen in fertilizer by reduction of sodium thiosulphate instead of chromium power
用硫代硫酸钠代替铬粉还原测定肥料中硝酸态氮 |
| 8. | Effects of different fertilizer application countermeasures on the soil nitrate nitrogen accumulation in dryland maize
不同施肥措施对旱地玉米土壤硝态氮累积的影响 |
| 9. | Seasonal dynamic variations in nitrate nitrogen in marsh soils from phragmites wetlands in xianghai national natural reserve
向海芦苇沼泽湿地土壤硝态氮含量的季节动态变化 |
