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Risultati 60-80 di 132

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

Fertilizer use and plant health

proceedings of the 12th colloquium of the International potash institute held in Izmir/Turkey, 1976

Soil and fertilizer nitrogen

review study with particular reference to plant nutritionand environmental protection

Fertilizantes de liberacion lenta

tipos, evaluacion y aplicaciones

Micronutrients in agriculture

proceedings of a symposium held at Muscle Shoals, Alabama, April 20-22, 1971

  • Symposium on micronutrients in agriculture Muscle Shoals 1971

VI ème Congrès mondial des fertilisants

actes du congrès

  • Congrès mondial des fertilisants 6. Lisbonne Congrès mondial des fertilisants

Physiological aspects of crop productivity

proceedings of the 15th Colloquium of the International Potash Institute held in Wageningen/Netherlands, 1980

  • International potash institute

Lezioni di chimica agraria

i fertilizzanti

  • Bottini, Ottaviano

Les engrais

  • Garrau, J.G.