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Fertilizer use and protein production

proceedings of the 11. Colloquium of the International Potash Institute held in Ronne-Bornholm/Denmark, 1975

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

Potassium in the agricultural systems of the humid tropics

proceedings of the 19th Colloquium of the International Potash Institute held in Bangkok, Thailand, 1985

  • International Potash Institute

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