<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>32</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Leech, George R.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Effects of Fertilization on Diameter Growth in Dense Stands of Ponderosa Pine in Arizona</style></title></titles><dates><year><style  face="normal" font="default" size="100%">1976</style></year></dates><publisher><style face="normal" font="default" size="100%">University of Arizona</style></publisher><volume><style face="normal" font="default" size="100%">MS</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">In 1961, fifty 1/5-acre plots were established near Blue Mountain in Arizona by Professor R.F. Wagle for the purpose of testing a selected group of fertilizers, a herbicide and a growth hormone in overcoming stagnation in Ponderosa pine stands. Thirteen treatments were applied at random on the plots. Nitrogen, phosphorus, potassium, fenuron, gibberellic acid, along with a select group of microelements were applied on the plots. Tree growth was measured at the end of each growing season by use of a dendrometer or growth band. The growth band measured circumference growth to 0.01 inches. Diameter measuements were made in 1961 and 1973 using a diameter tape. Diameter measurements were estimated to 0.01 inches. The data were analyzed using Student-Newman-Kuels’ test. The analyses were performed at the 95% confidence level. The results indicated that stagnation cannot be broken using fertilizers without thinning when the stand and site characteristics of the type present in this study exist.</style></abstract></record></records></xml>