Fig. 4From: Effects of N and P additions on twig traits of wild apple (Malus sieversii) saplingsThe membership function values of twig traits of wild apple saplings treated with N, P, N20Px, and NxP4. Low: N10, P2, N20P2, and N10P4; Medium: N20, P4, and N20P4; High: N40, P8, N20P8, and N40P4Back to article page