If you do not mean a bare soil, the greatest impact wil be done by enlarged plant metabolites from roots (plant, sure, will grow better)
Soil micro-organisms are highly P efficient so Alex is correct about available carbs
Dear Rebati: Sometimes it is difficult to establish generalizations about these topics in the scientific literature, because the values used are expressed in different units or the experimental conditions are very different. For example, P application (10 g P m-2) and AM inoculation promoted the growth of American jointvetch and Greenleaf desmodium and P application not suppress AM colonization. There was according to Tobisa and Uchida (2017): Effect of Phosphorus Application and Arbuscular Mycorrhizal Fungi Inoculation on the Growth of American Jointvetch and Greenleaf Desmodium (DOI: 10.3844 / ajabssp.2017.85.94). On the other hand, other results (Sheng et al. 2013) confirmed that long-term (17 years) P-fertilization stimulated AMF sporulation, especially when 35 kgPha-1 was applied in a moldboard plow (MP) or no till (NT), and fertilization with 0, 17.5, or 35 kgPha-1 at a long-term (17 years) experimental site in a continental humid zone of eastern Canada (http://dx.doi.org/10.1007/s11104-013-1585-4). Therefore, it is necessary to make meticulous searches and reach the conclusions that allow us to carry out these works, my best wishes, Eduardo
thank you so much for your answers @ Paul Milham @ Alex Ignatov and @ Eduardo Furrazola Gómez
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