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testo

The challenge of production system sustainability

long-term studies in agronomic research in dry areas : : abstracts of presentations and Workshop conclusions

  • International Center for Agricultural Research in the Dry Areas
testo

Nutrient balances and the need for fertilizers in semi-arid and arid regions

proceedings of the 17th Colloquium of the International Potash Institute held in Rabat and Marrakech, Morocco, 1983

  • International Potash Institute
testo

Water harvesting for improved agricultural production

proceedings of the FAO expert Consultation : Cairo, Egypt, 21-25 November 1993

  • Food and Agriculture Organization of the United Nations

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