INFLUENCE OF THE CUMULATIVE TEMPERATURE OF PLOUGH LAYER ON THE CORN ROOT SYSTEM AND PLANT GROWTH
Yang Wenbin, Bai Dongcai, Dong Xincheng, Tian Yudan
ACTA AGRICULTURAE BOREALI-SINICA . 1987, (3): 44 -51 .  DOI: 10.3321/j.issn:1000-7091.1987.03.009