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Effect of preceding crops and green manure on the fertility of clay loam soil
clay loam legume crops green manure humus winter wheat
2010/1/13
Influence of red clover (Trifolium pratense L.), sown lucerne (Medicago sativa L.), vetch and oat mixture (Vicia sativa L., Avena sativa L.) and green material of these legume crops used as green manu...