For simplification the term leaf is occasionally used to denote leaflet in the case of pecan. If leaf analysis results are not available, the following suggestions may be used as a guide for applying fertilizer. These fertility guides should be adjusted according to such variables as growth and fruiting characteristics, amount of pruning, and soil. In some situations an application of nitrogen alone may be adequate. May. The annual terminal growth of bearing trees should be maintained at about eight inches in length, and fruit spurs should have about eight leaves.
Pears do best under medium or low fertility.
High fertility increases succulent growth and susceptibility to fireblight disease. Annual terminal growth of six to eight inches on mature trees is sufficient. Peaches, Nectarines, and Apricots. After the danger of frost is past, it may be advisable to add two to four pounds of ammonium nitrate or its equivalent per tree if a good crop is set. The annual growth of mature peaches and nectarines should be maintained between 10 to 18 inches in length.