The influence of conservative and progressive factors on dynamics of quantitative and qualitative properties of grassland and perennial fodders under diverse agroecological conditions of South Bohemia [Czech Republic]

application rates azote calcio calcium crop yield dose d'application engrais liquide engrais npk exploitation des herbages facteur de rendement farmyard manure feed grasses fertilidad del suelo fertilisation fertilizantes npk fertilizer application foin fosforo grassland management hay heno liquid fertilizers manejo de praderas nitrate nitrates nitratos nitrogen npk fertilizers nutritive value phosphore phosphorus potasio potassium reclamation rendement des cultures rendimiento de cultivos sodio sodium soil chemicophysical properties soil fertility trifolium pratense valeur nutritive valor nutritivo yield factors