Approaches to Soil Health Analysis, Volume 1. Группа авторов
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70 Wienhold, B.J., Pikul, J. L., Liebig, M. A., Mikha, M. M., Varvel, G. E., Doran, J. W., & Andrews, S.S. (2006). Cropping system effects on soil quality in the Great Plains: Synthesis from a regional project. Renewable Agricultural Food Systems, 21, 49–59. https://doi.org/10.1079/RAF2005125
71 Wienhold, B. J., Karlen, D. L., Andrews, S. S., & Stott, D.E. (2009). Protocol for soil management assessment framework (SMAF) soil indicator scoring curve development. Renewable Agricultural Food Systems, 24, 260–266. https://doi.org/10.1017/S1742170509990093
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1 * Disclaimer: Mention of names or commercial products in this document does not imply recommendation or endorsement by the U.S. Department of Agriculture.
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