Fig. 6From: Simultaneously maximizing root/mycorrhizal growth and phosphorus uptake by cotton plants by optimizing water and phosphorus managementCombined effects of water and phosphorus on cotton root length density (a), hyphal density (b), and P uptake (c). In c, the soil water content is the average value in the root boxes, so the soil water content range is smaller. Areas in which the maximum values are located are indicated by a dotted circleBack to article page