Skip to main content
ARS Home » Plains Area » Fort Collins, Colorado » Center for Agricultural Resources Research » Water Management and Systems Research » Research » Software » Download

headline bar
PhenologyMMS 1.3

Welcome to the software download area! Please contact us if you have problems or questions.

Download Available

PhenologyMMS 1.3 is a software program designed to simulate the phenological development of certain crops. Phenology is the sequence or timing of developmental stages or events and is essential to understanding crop development and growth. Many users and farmers in particular need this information as many management decisions are based on the growth stage of the crop. This helps to enhance economic crop yields and at the same time maintain environmental quality. For example, as water for agriculture becomes increasingly more limited it will be critical to know the developmental stage the crop is at so the grower knows when the best times are to apply water. Simulation models and decision support tools also benefit by having crop simulation models which predict the timing of growth stages.

Plant development is orderly and predictable, (Rickman and Klepper, 1995; McMaster, 2005) and the plant’s genetics determines the sequence of the growth stage events (Distelfeld et al., 2009; Moragues and McMaster, 2012). Environmental conditions also influence the plant’s development rate and includes such things as temperature, water availability, nutrients, photoperiod , etc. (White et al., 2008). Temperature has been used most frequently to predict the timing of developmental events and often uses some measurement of thermal time. Another very important influence on crop development is water availability, however many models do not include this impact on development. “Confounding the problem of variable phenological responses to water deficits is that for most crops the complete developmental sequence of the shoot apex has not been completely summarized and quantified or correlated with readily observable developmental stages.”(McMaster et al., 2013).

PhenologyMMS 1.3 employs temperature as thermal time and water stress to predict the development of the crop and the timing of phenological growth stages.

Download Form

Please 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)
First Name   
Last Name   

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.