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| 2 | Influence of soil cationic environment crop responses to NPK fertilizers |
| Language: | English |
| 3 | |
| 4 | Studies with 32P on phosphorus utilization by maize and wheat in sequence |
| Language: | English |
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| 6 | |
| Language: | English |
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| 8 | |
| Language: | English |
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| 10 | |
| Language: | English |
| 11 | Simulation models for the study of some biological variables inthe human reproductive process |