Fig. 3: Nutrient addition effects on sunlit foliar chemistry, weighted by the importance value index of the sampled five dominant tree species in each replicate plot, at the nutrient addition experiment in Budongo Forest Reserve, Uganda. | Nature Geoscience

Fig. 3: Nutrient addition effects on sunlit foliar chemistry, weighted by the importance value index of the sampled five dominant tree species in each replicate plot, at the nutrient addition experiment in Budongo Forest Reserve, Uganda.

From: Response of tropical forest productivity to seasonal drought mediated by potassium and phosphorus availability

Fig. 3: Nutrient addition effects on sunlit foliar chemistry, weighted by the importance value index of the sampled five dominant tree species in each replicate plot, at the nutrient addition experiment in Budongo Forest Reserve, Uganda.

a–c, Box plots (25th quartile, median and 75th quartile) and whiskers (1.5 × interquartile range) of foliar chemistry (n = 16 plots) in treatments with or without nitrogen (+N vs −N), phosphorus (+P vs −P) and potassium (+K vs −K) after ~1.5 years of the nutrient addition experiment. Asterisks indicate the significant positive effects of N addition (a; F1,24 = 9.26, P = 0.006**) and P addition (b; F1,24 = 5.86, P = 0.023*) on foliar N content.

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