Each incrementoflength brings a further saving, but the sizes of such benefits decrease with increasing neck length.
长度越长，越能节省能量，但节省的能量大小却是随着脖子长度的增长而减小的。
3
Living under shade condition, The length and width of leaf lamina , internodes, and canopy height is increase , but Stolon diameter decrease along with the increment of shade level.