00486nam a2200157Ia 4500 CTU_38527 210402s9999 xx 000 0 und d 631.523 H992 Hybridization of crop plants Wisconsin, USA The American Society of Agronomy 1980 fertilization of plants,hybridization, vegetable,plant breeding Liên, 970613 Trung tâm Học liệu Trường Đại học Cần Thơ