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Productivity of hired and family labour and determinants of technical inefficiency in Ghana's fish farms
Onumah, Edward E.; Hoerstgen-Schwark, Gabriele; … - 2009
Persistent link: https://www.econbiz.de/10003870768
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Effects of stocking density and photoperiod manipulation in relation to estradiol profile to enhance spawning activity in female Nile tilapia
Onumah, Edward E.; Wessels, Stephan; Wildenhayn, Nina; … - 2009
Persistent link: https://www.econbiz.de/10003870774
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Tendenzen auf dem Weltgetreidemarkt : anhaltender Boom oder kurzfristige Spekulationsblase?
Brümmer, Bernhard; Koester, Ulrich; Loy, Jens-Peter - 2008
Persistent link: https://www.econbiz.de/10003746810