FERTILIZATION AT TIME OF SOWING AND AT TIME OF PLANTING1

SILVICULTURE NOTE 8 Seven fertilization at the time of planting (FAP) and time of sowing (FAS) trials on different stock types of lodgepole pine, Douglas-fir, redcedar, and white spruce are reviewed. The trials used different rates of fertilizer, different fertilizer release characteristics, and different types of fertilizer. FAS treatments showed little growth or survival effects. FAP treatments only showed slight effects on survival and no significant differences in height growth. Only one FAP treatment in one trial significantly reduced planting check. Some FAP treatments were confounded by site effects. On some sites, FAP resulted in increased frost and browse damage