Hanson, Blaine R., Hopmans, Jan, Simunek, Jirka. "Effect of Fertigation Strategy on Nitrogen Availability and Nitrate Leaching using Microirrigation". HortScience 2005 40: 1096 North Carolina Department of Agriculture and Consumer Services, www.ncagr.com/fooddrug/pesticid/chemigation2003.pdf "Chemigation & Fertigation".