Frequent pruning has been shown to increase yields and dampen the alternate bearing cycle in pecans (Carya illinoinensis (Wangenh.) K.Koch). Currently, the pruning wood is burned. However, burning may be prohibited in the future because of environmental concerns. Chipping and incorporation of pecan pruning wood into the soil may be an alternative disposal method. The objective of this research was to determine if soil incorporation of pecan woodchips would affect the availability of inorganic nitrogen. Pecan woodchips were incorporated (disking to 10 cm) into a silty clay soil at rates of 0, 4,484, 8,968, 13,452, and 17,936 kg/ha in May of 2002, June of 2003, and May of 2004. Some plots received nitrogen at a rate of 0, 15.2, 30.5, 45.7, and 61.0 kg/ha to adjust the C:N ratio of trimmings to 25:1. The experimental design was a randomized complete block design with 9 treatments, 3 application times, and 4 replications. Inorganic soil nitrogen was monitored monthly during the summer through fall of 2002, 2003, and 2004. Pecan chips applied in 2002 and followed through 2004 did not significantly decrease inorganic nitrogen (immobilize nitrogen) except for one sampling date in August of 2002. Inorganic soil nitrogen in the control and chip amended soil were not significantly different in plots receiving repeated application in 2003 and 2004. Inorganic nitrogen was not immobilized by woodchips in plots receiving nitrogen. Other soil properties measured included soil moisture, bulk density, and aggregate stability. Incorporation of pecan chips had little effect on inorganic (plant available) soil nitrogen and poses no significant risk to pecan trees.