21.   Trees need about an inch of rainfall a week, and, when not much rain is falling, the tree owner needs to step in.

22.   Afforestation is not a one-time activity and trees need to be nursed.

23.   In addition to having better-looking trees, farmers can save money if the tree reaches a marketable height in fewer years and if the tree needs less labor-intensive pruning.

24.   Pecan trees need rain in September to fill out the nuts growing inside the shells.