The Vertical Distribution Characteristics of Soil Nutrients in Poplar-crop Agroforestry System under Different Intermediate Cutting Patterns
FAN Shi-chao, ZHANG Hai-lin, HUANG Guang-hui, SUN Guo-feng, SUI Peng
ACTA AGRICULTURAE BOREALI-SINICA . 2010, (S2): 236 -241 .  DOI: 10.7668/hbnxb.2010.S2.052