Fig. 4
From: Similar carbon density of natural and planted forests in the Lüliang Mountains, China
Contour map of carbon density based on kriged data for natural, planted, and all forests. Letters represent the dominant species for natural (a) and planted forests (b): a, Pinus tabulaeformis Carr.; b, Platycladus orientalis (L.) Franco; c, Pinus bungeana Zucc.; d, Larix principis-rupprechtii Mayr.; e, Picea meyeri Rehd. et. Wils; f, Quercus spp.; g, Betula platyphylla Suk.; h, Populus davidiana Dode; i, Rosa xanthina Lindl.; j, other Populus species; k, Caragana spp.; l, Ziziphus jujuba Mill.; m, Robinia pseudoacacia L.; n, Juglans regia L.; o, Malus pumila Mill.; and p, Armeniaca vulgaris Lam.