Fig. 4: A conceptual model diagram illustrating the process of mutual promotion of N and P availability in the early soil.
From: Large-scale experimental evidence of carbon-mediated N and P co-amplification in proglacial soils
AP available P, AN available N, DOC dissolved organic C, amoA genes ammonia oxidation genes associated with the nitrification process, cbbL genes C fixation genes cbbL, nifH genes nitrogen fixing gene nifH.
