干旱区研究
Effects of early sowing and tillage measures on nitrogen and phosphorus in the soil supporting spring wheat in the semi-arid area of the Loess Plateau
LIU Shuainan,LI Guang,SONG Liangcui,YUAN Jianyu,XIE Mingjun,WEI Xingxing
Arid Zone Research . 2021, (5): 1367 -1375 .  DOI: 10.13866/j.azr.2021.05.18