Welcome to the software download area! Please contact us if you have problems or questions.
The UCPNM (Upland Cotton Petiole Nitrogen Management) application provides interpretation for cotton petiole nitrate data. Users can enter in-season petiole nitrate-N data in ppm from just before first square up to peak bloom. Secondly it is necessary to enter either the cotton growth stage or growing degree days since planting. The application returns information in graph form of what category the petiole nitrate data is in: deficient, optimal, or excessive. If deficient, a Nitrogen fertilizer application recommendation is given. The guidelines are based on Pennington and Tucker (1984), with the exception that we have lowered the deficiency line by 1000 ppm. The application is based on long-season, irrigated, low and high elevation arid cotton areas, so it may not be applicable for shorter season and humid cotton growing regions.
Bronson, K.F., E. R. Norton, and J.C. Silvertooth. 2021. Revising petiole nitrate sufficiency/guidelines for irrigated cotton in the Desert Southwest. Soil Sci. Soc. Am. J. 85:893-902. https://doi.org/10.1002/saj2.20213
Pennington, D.A. and T.C. Tucker. 1984. “The cotton petiole: A nitrogen fertilization guide.” Report 8373. The University of Arizona. College of Agriculture.
This application is available as either a web application or a Windows application.
The web-based software can be used on smart-phones and tablets. You can register your name and fields, and multiple date data can be managed, stored and graphed.
This version was developed as a collaborative effort with CCT Web and Mobile Development at University of Arizona.
Download the installer using the link below.
Download FormPlease complete the form below to track the use of the service we are providing and to help improve our product.
OMB 0518 - 0032 (01/2025)
According to the Paperwork Reduction Act of 1995, an agency cannot conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a valid OMB control number. The valid OMB control number for this information collection is 0518-0032. The time required to complete this information is estimated to vary from one to five minutes with an average of three minutes per response, including time for reviewing instructions, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Agriculture, Clearance Officer, OIRM, Room 404-W, Washington, DC 20250, and to the Office of Information and Regulatory Affairs, Office of Management and Budget.