The effect of long-term fertilization on the exchange complex and microbial community of leached chernozem Svistova, I.D.; Stekol'nikov, K.E.; Sherbakov, A.P.; Malykhina, N.V. Agrokhimiya 6: 16-23 2004 https://eurekamag.com/research/035/874/035874893.php