posted on 2022-08-23, 03:33authored byDA Cowan, PH Lebre, CER Amon, RW Becker, HI Boga, A Boulangé, TL Chiyaka, T Coetzee, PC de Jager, O Dikinya, F Eckardt, M Greve, MA Harris, DW Hopkins, HB Houngnandan, P Houngnandan, K Jordaan, E Kaimoyo, AK Kambura, G Kamgan-Nkuekam, TP Makhalanyane, G Maggs-Kölling, E Marais, H Mondlane, E Nghalipo, BW Olivier, M Ortiz, LR Pertierra, J-B Ramond, M Seely, I Sithole-Niang, A Valverde, G Varliero, S Vikram, DH Wall, A Zeze
Additional file 2. Figure S2. Significant (p-value < 0.01) variation of soil chemistry and climatic variables across African countries. Significance was calculated using the Kruskal-Wallis test for non-parametric data distributions, while pair-wise comparison was calculated using the pairwise Wilcox test. Significant results are indicated using the following nomenclature: * - p-value < 0.05; ** - p-value < 0.01; *** - p-value < 0.001.