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Prairie --- Prairies --- Engrais organique --- Organic fertilizers --- Fertilité du sol --- soil fertility --- Matière organique du sol --- soil organic matter --- Ammonium --- Volatilité --- Volatility --- Impact sur l'environnement --- Environmental impact --- Lutte antipollution --- pollution control --- Additif --- Additives --- Micro-organisme --- microorganisms --- Alimentation collective --- institutional feeding --- Excrétion --- Excretion --- Cycle de l'azote --- nitrogen cycle --- Alimentation rationnée --- Restricted feeding --- Netherlands --- 631.862 --- 633.2 --- 631.814 --- Farmyard manure. Animal dung. Stable muck (including sullage, liquid manure) --- Forage grasses. Meadow and pasture grasses --- Loss of fertilizer principals. Change in manurial value --- Theses --- 631.814 Loss of fertilizer principals. Change in manurial value --- 633.2 Forage grasses. Meadow and pasture grasses --- 631.862 Farmyard manure. Animal dung. Stable muck (including sullage, liquid manure) --- Excretion.
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