Plastic-film-side seeding, as an alternative to traditional film mulching, improves yield stability and income in maize production in semi-arid regions oleh Bing-chao ZHANG, Han HU, Zheng-yu GUO, Shuai GONG, Si SHEN, Shu-hua LIAO, Xin WANG, Shun-li ZHOU, Zhong-dong ZHANG