Contrasting of foreign varieties of white clover (Trifolium repens L.) from the aspect of forage quality

agronomic characters amino acids breeding breeding methods calidad composition crops cultivar cultivars cultivos dicotiledoneas dicotyledons economic plants feed crops feed legumes fertilidad del suelo legumes leguminosae leguminosas leguminosas forrajeras methode methods nutritive value organic compounds organic nitrogen compounds papilionoideae plantas plantas forrajeras plante plante de culture plants quality rosales selection soil fertility trifolium trifolium repens valeur nutritive valor nutritivo