Effects of Different Flex Cropping Modes on Soil Enzyme Activities and Soil Nutrients in the Cold Area of Middle Part of Gansu
LUO Ying, WANG Liguang, CHEN Jun, YE Chunlei, ZHANG Renzhi, LUO Junjie
Journal of Nuclear Agricultural Sciences . 2017, (6): 1185 -1191 .  DOI: 10.11869/j.issn.100-8551.2017.06.1185