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Fertilizers in context with resource management in agriculture : 13th International Fertilizer Symposium, June 10-13, 2002, Tokat, Turkey ; proceedings
Role of fertilizers in sustainable agriculture : 12th International Symposium of the International Scientific Centre of Fertilizers (CIEC), 21-22 August, 2000, Suceava, Romania ; proceedings
Codes of good fertilizer practice and balanced fertilization : 11th CIEC International Symposium September 27-29, 1998 Pulawy, Poland ; proceedings
Recycling of plant nutrients from industrial processes : 10th International CIEC Symposium ; 1996, 9-11 December, Braunschweig-Völkenrode, Germany
Agricultural waste management and environmental protection : 4th International CIEC Symposium ; 1987, 11-14 May, Braunschweig, Federal Republic of Germany ; proceedings ; vol. 2
Agricultural waste management and environmental protection : 4th International CIEC Symposium ; 1987, 11-14 May, Braunschweig, Federal Republic of Germany ; proceedings ; vol. 1
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