1. Barker AV (2010) Growth of loblolly pine and white pine after enrichment by nutrient loading. Commun Soil Sci Plant Anal 41:2613–2622
2. Birge ZKD, Jacobs DF, Salifu FK (2006) Exponential nutrient loading as a means to optimize bareroot nursery of oak species. USDA For Serv Rocky Mt Res Stn Proc 43:147–151
3. Blanco A, Monge E, Val J (2002) Effects of paclobutrazol and crop-load on mineral element concentration in different organs of “Catherine” peach trees. J Plant Nutr 25:1667–1683. doi: 10.1081/PLN-120006050
4. Borchert R (1991) Growth periodicity and dormancy. In: Raghavendra AS (ed) Physiology of trees. Wiley, New York, pp 221–245
5. Burns RM, Honkala BH (1990) Silvics of North America: 2. Hardwoods. Agriculture Handbook 654. U.S. Department of Agriculture, Forest Service, Washington, DC. vol 2, pp 877. http://www.na.fs.fed.us/pubs/silvics_manual/volume_2/populus/tremuloides.htm . Accessed 2 Dec 2012