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- Nitrato de resíduos 1
- Nitrificação 3
- nitrification 1
- Nitrite 1
- Nitritos 1
- Nitrogen 14
- nitrogen 74
- Nitrogen assimilation 1
- Nitrogen balance 1
- nitrogen balance 1
- Nitrogen compounds 1
- Nitrogen concentration 1
- Nitrogen cycle 1
- Nitrogen deficiency 1
- Nitrogen fertilizer 4
- Nitrogen fertilizers 11
- nitrogen fertilizers 22
- Nitrogen fixation 19
- nitrogen fixation 26
- Nitrogen fixing bacteria 1