csol_sand d_max fff fnps FUN_fracfixers grperc jmaxb0 jmaxb1 k_nitr_max_perday KCN kmax leafcn lmr_intercept_atkin lmrha maxpsi_hr medlynintercept medlynslope nstem psi50 theta_cj tpu25ratio wc2wjb0
