a Article Qu, J. | Liu, Y. | Xu, X. | Liu, Z. | Meng, X. Evaluation of the effects of different fertilization modes on black soil fertility in China based on principal component and cluster analysis PDF 2020 - Pisa University Press Is part of Agrochimica : International Journal of Plant Chemistry, Soil Science and Plant Nutrition of the University of Pisa : 64, 2, 2020 Permissions Download | Copy/paste | Printing Download | Copy/paste | Printing EUR 10.00 VAT Excluded