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User guide to the standard operating procedure for G+ tools (G+SOP)
Ashby, J.A. and Polar, V. (2021). User guide to the standard operating procedure for G+ tools (G+SOP). CGIAR Research Program on Roots, Tubers and Bananas, User Guide. 2021-3. International Potato Center: Lima, Peru. www.rtb.cgiar.org/gbi.