The researchers evaluated the growth and development abillity of some hybrid maize varieties grown in Spring 2018 in 4 northern and north central provinces including Viet Tri - Phu Tho, Vinh Tuong - Vinh Phuc, Phu Yen - Son La, Yen Dinh - Thanh Hoa. The experiments were arranged in a completely randomized block format with 3 replicates. Each hybrid maize was cultivated in 4 rows in a 5-m long plot; the distance between two rows was 70 cm and the distance between two plants was 25 cm. Fertilizers applied generally for experiments were 150 kg N + 90 kg P2O5 + 80 kg K2O/ha. The results showed that the growth time of experimental hybrid maize varieties in Viet Tri - Phu Tho ranged from 122 to 127 days, in Vinh Tuong - Vinh Phuc ranged from 117 to 120 days, in Phu Yen - Son La fluctuated from 113 to 116 days, in Yen Dinh - Thanh Hoa from 97 to 105 days. | Research on growth and development of new hybrid maize varieties in the spring of 2018 at some provinces in northern and north central region
