Yazar
Eva Weltzien
3 cilt bulundu.
Cilt sonuçları
Plant breeding and farmer participation
Salvatore Ceccarelli, Elcio P. Guimarães, Eva Weltzien · Food and Agriculture Organization of the United Nations
671 sayfa · 2009
Agricultural extension work / Farmers / Fieldwork / Agriculture / Plant breeding
Improved Crop Productivity for Africa’s Drylands
Tom Walker, Tom Hash, Fred Rattunde, Eva Weltzien · World Bank Publications
136 sayfa · 2016
Arid regions / Crop yields / Agriculture, africa