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Publications by P. S. Hammes
Die Invloed Van Kultivar, Stikstofbemesting en Tophoogte Op Die Kwaliteit Van Oonddroogtabak II. Chemiese Kwaliteit
South African Journal of Plant and Soil
Ecology
Plant Science
Soil Science
Economic Exploitation of the Photosynthetic Process: The Basis of Agricultural Production
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie
