Welcome to the Irris Scheduler Home Page

Irris Scheduler estimates irrigation water needs for corn, soybean, established alfalfa, dry bean, potato and other crops, as well as soil nitrogen losses and availability. It was developed by the Purdue University Department of Agronomy as an easy-to-use tool to assist crop producers with irrigation scheduling and nitrogen application decisions.

New features in version 1.37 (as of 22-Mar-2017, release 1.3.7.0):

Updated to support U.S. National Weather Service Forecast https protocol in retrieving 5-day forecast.
Fix for change in behavior of Michigan Enviro-weather Network data site.

New features in version 1.36 (as of 15-Feb-2017, release 1.3.6.0):

Support added for retrieving IEMRE gridded weather data for field's latitude and longitude in 13 Midwest states.

New features in version 1.35 (as of 19-Dec-2016, release 1.3.5.1):

Support added for nitrogen from liquid dairy manure.
Support added for 22-11-0 fertilizer.

New features in version 1.35 (as of 08-Dec-2016, release 1.3.5.0):

Eliminated need to download and install obsolete Microsoft WinHelp to display program help.
Support for Soil Data Mart https protocol. OpenSSL libraries required for https access are now included with Scheduler installer.

New features in version 1.34 (as of 06-Sep-2016, release 1.3.4.0):

Fix for change in weather station data site.

New features in version 1.33 (as of 06-Jun-2016, release 1.3.3.2):

Fix for change in location of Michigan Enviro-weather Network data sites. (Important! Michigan Enviro-weather Network and Weather Underground sites now use the secure https protocol. You may need to install the OpenSSSL libraries if they're not already installed on your computer. You can use the first Win32 installer here to do that:
http://slproweb.com/products/Win32OpenSSL.html.)

New features in version 1.33 (as of 04-Apr-2016, release 1.3.3.0):

Fix for importing muck soil AWC and pH.
Fix for change in location of Weather Underground data sites. (Important! Weather Underground sites now use the secure https protocol. You may need to install the OpenSSL libraries if they're not already installed on your computer. You can use the first Win32 installer here to do that:
http://slproweb.com/products/Win32OpenSSL.html.)

New features in version 1.31 (as of 28-Jul-2015, release 1.3.1.0):

Fix for inconsistency in how surface horizon organic matter override is used.

New features in version 1.30 (as of 20-May-2015, release 1.3.0.0):

Support for exporting Irris input data to the AgMIP Crop Experiment (ACE) file format (JSON).
Fix for slight change in Weather Underground Personal Weather Station (PWS) data format.

New features in version 1.22 (as of 13-Mar-2015, release 1.2.2.0):

Improved speed of retrieving lists of weather stations.
Adjustment to estimate of crop N uptake when moisture stress is present.

New features in version 1.21 (as of 25-Feb-2015, release 1.2.1.0):

Support for retrieving weather data from Michigan Enviro-weather Network.
Fix for crop ET estimate.

New features in version 1.20 (as of 05-Feb-2015, release 1.2.0.0):

In the list of weather stations to import weather data from, the distance and direction from the field to each station is displayed if this can be determined for the station's on-line weather source.
In the list of weather stations, you can click a column header to sort the list by that column (weather station name, ID, distance or direction).
You can also select multiple weather stations to import from (for example, the five nearest stations) and let the program interpolate between them.
When selecting weather station(s) to import from, you can click the View Map button to see a map showing the locations of the field and the selected station(s).
Support added for weather stations in Australia, Brazil, Canada, Mexico and Spain. You can now select from a list of ASOS stations or Weather Underground Personal Weather Stations in those countries. (Note: Click the link at the bottom of this page to request support for your country's ASOS and PWS weather stations.)
You can now edit soil horizon data. This is particularly useful for non-US locations where soil survey data isn't available to the program. Refer to the program help for documentation on the soil properties required by the soil nitrogen model and references for estimating these properties yourself.
In the Preview Schedule window, the new Chart button now allows you to automatically chart soil moisture, weather, evapotranspiration and soil nitrogen in Excel.
The About box now has a Check for Updates button.
Support for 7-21-7 fertilizer.
Fix for EC adjustment to AWC.

New features in version 1.10 (as of 24-Sep-2014, release 1.1.0.0):

Initial support for nitrogen from liquid swine manure.
Support for drip tape irrigation.
Support for 4-10-10 and 9-23-30 fertilizers.
Support for Fallow previous crop.
Support for soils with restriction layer in crop's normal root zone.

New features in version 1.09 (as of 27-Jan-2014, release 1.0.9.1):

Updated to handle new format of weather station list (Import from Web).

New features in version 1.09 (as of 20-Jun-2013, release 1.0.9.0):

This version can now estimate soil nitrogen losses and availability for U.S. soils. The schedule now includes columns for daily nitrogen availability and cumulative nitrogen losses.
This version can also estimate crop nitrogen uptake for the following crops:
- Corn
- Winter wheat
You can now enter nitrogen fertilizer applications.
If you want to account for irrigation water nitrates, you can enter nitrate concentration (ppm) for one or more sample dates.
You can now retrieve and import weather data from several weather sources on the Web. If your weather station uploads data as a Weather Underground Personal Weather Station, you can retrieve your own weather data.
You can now enter changes in crop residue cover (for example, following tillage).
You can now start your schedule prior to crop emergence (for example, you can start immediately after the previous crop's harvest or prior to the next crop's first nitrogen fertilizer application).
Additional example schedule files for both irrigation and nitrogen.
Minor name change from "Irrigation Scheduler" to "Irris Scheduler".
You can still open schedule data files created with previous versions.

New features in version 1.07 (as of 02-Feb-2012, release 1.0.7.0):

Includes additional example files based on USDA-NRCS SCAN data.
Support for Rye grass hay.
Support for retrieving iMETOS ag weather station data via the Internet (using fieldclimate.com Web service).
Support for localization of date formatting to use "short date" format from Windows Control Panel.
Support for localization of number formatting to use the decimal symbol from Windows Control Panel.

New features in version 1.06 (as of 22-Dec-2011, release 1.0.6.0):

Support for indicating that the field is "coastal" instead of "interior" (the default).
Support for entering irrigation efficiency.
New column in the weather grid for entering average daily relative humidity (optional).
More crops. Carrot, Onion (dry), Sugarbeet and Sunflower have been added.
Irrigation schedule now includes rows of averages, maximums and minimums.
Irrigation schedule can now be exported to a CSV file that can be opened in Excel and other programs.
Support for metric units as well as U.S. units.
Help now includes notes for international users.

New features in version 1.05 (as of 21-Nov-2011, release 1.0.5.0):

Updated for new National Weather Service forecast site.

New features in version 1.04 (as of 17-Feb-2011, release 1.0.4.1):

New calculation model, based on "FAO Irrigation and Drainage Paper No. 56: Crop Evapotranspiration".
More locations. You can now select any of the 48 U.S. contiguous states.
Once you've selected the state you can now access soil survey data via the Internet. Click the Import Soil button to get started.
More crops. Supports corn for grain, corn for silage, soybean, dry bean, green bean, winter wheat, established alfalfa, sweet corn, potato, melon and tomato.
Support for latitude and longitude. Latitude is required for the new calculation model, but it can also be used along with longitude to zoom in on the irrigated field on a map using the new View Map button.
Support for entering elevation (optional).
New columns in the weather grid for entering average wind speed (optional) and daily notes.
Support for importing more weather data file formats. You can also create your own weather data file with Excel and import it.
Support for retrieving National Weather Service 5-day high-low temperature forecast via the Internet.
You can override the irrigated crop's growth stage to account for a shorter or longer growing season.
You can still open irrigation schedule files created with previous versions of Irrigation Scheduler.

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Last updated: March 22, 2017