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Auteur P. Berg |
Documents disponibles écrits par cet auteur (4)
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ouvrage
ouvrage
ouvrage
thèse/mémoire
Nitrifier populations and nitrification rates were studied in four arable cropping systems ( fertilized grass ley and barley and unfertilized lucerne ley and barley ) over three years. Numbers of nitrifierss were determined with the Most Probabl[...]