Fig. 4From: Spatial characteristics of nutrient allocation for Picea crassifolia in soil and plants on the eastern margin of the Qinghai-Tibet PlateauSoil stoichiometric characteristics with soil depths in the Qilian Mountains. (Note: SOC = soil organic carbon, TN = soil total nitrogen, TP = soil total phosphorus, different capital letters indicate significant differences in stoichiometric characteristics of different soil depths in the same region, and different lowercase letters indicate significant differences in stoichiometric characteristics of the same soil depth in different regions.)Back to article page