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- 15N
- 15N isotope dilution...
- 15N labelled urea
- 15N tracer methodolo...
- Dry matter
- Labelled urea
- Leaf
- M. bracteata
- N fixation
- N recovery
- N utilization
- N-utilization
- N2 fixation
- Nitrification inhibi...
- Nitrogen uptake
- P. phaseoloides
- Rubber seedings
- Rubber tree
- Seedling nursery
- Urease inhibitor
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