Cost: FREE
Accurate estimates of ammonia volatilization losses from surface applications of urea in agriculture. Estimates are in percent of the total N rate applied. Updated: March, 2019; Version: 1.02

Download Ammonia Loss for iOS

Download Canola Starter for AndroidCost: FREE
This App calculates the maximum amount of fertilizer that should be applied with winter canola seed at planting based upon row spacing and fertilizer source. This app is just a general guide and sounds agronomics should be used in all situations.
Released: Jul 20, 2014; Version: 1.0; Requires iOS 6.0 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

Download Canola Starter for iOS

Cost: FREE
Canopeo is a rapid and accurate green canopy cover measurement tool. Use this app to quantify the percent canopy cover of live green vegetation for any agricultural crop, turf, or grassland based on downward-facing photos taken with your mobile device. Replace the traditional visual scoring or the sometimes expensive desktop programs with this powerful and portable quantitative tool.

Released: Jan 11, 2015; Version: 1.0; Requires iOS 7.1 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

Download Canopeo for iOS

Cost: FREE
This application is designed to help producers identify management practices for cow-calf operations when pasture is limited. There is a list of questions in this application intended to help beef producers determine appropriate management practices for cow-calf operations when pasture is limited. Answer the series of questions to determine a possible management practice.
Released: October 11, 2016; Version: 1.0

Download Cattle Management in Limited Forage for Android

Cost: FREE
With the input of laboratory results and an expected seasonal irrigation by the user this app will provide an estimated amount of nutrients delivered with every acre in of water applied and total pounds per acre per season. These results can then be used to adjust fertilizer management plans and strategies.
Updated: April 1, 2016; Version: 2.1; Requires iOS 8.1 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5, 6, and 6 Plus.

Download Crop Nutrients in Irrigation Water Calculator for iOS
Download Crop Nutrients in Irrigation Water Calculator for Android

Cost: FREE
Oklahoma Nutrient Management Field Guide App is a mobile version of a printed handbook. Within this App users have access to nutrient removal values, a nutrient deficiency identification tool, fertilizer calculations for all of the major crops grown with Oklahoma and information on fertilizer sources and using the N-Rich Strip and GreenSeeker Sensor.
Updated: Sep 29, 2014; Version: 1.1.0; Requires iOS 7.1 or later. Compatible with iPad.

Download Field Guide for iOS

Cost: FREE
This application is designed to record observations of gamebirds to help estimate annual reproduction. You will be able to enter your best count of both adult and immature birds for each observation. While you may enter information any time of the year, gamebird Specialists are particularly interested in observations from May through October. Thank you for your help in managing upland gamebirds in Oklahoma! Released: March, 2019, version 1.1 (iOS), 1.3 (Android)

Download Gamebird Brood Observation for iOS
Download Gamebird Brood Observation for Android

Cost: FREE
This application allows the user to determine the presence of Greenbugs or Mummies from tiller samples. If present, the application provides a recommendation for treatment. Released: November, 2018, version 1.0

Download Glance-N-Go for iOS
Download Glance-N-Go for Android

Cost: FREE
This application is designed to aid in the calibration of a grain drill or planter for canola seeding rates. Canola seeding rate can be calibrated via volumetric (mL) measures. All other grains and granular fertilizer rates can be calibrated through weight measures (grams, ounces, or pounds). Released: May 31, 2016; Version: 1.0

Download Grain Drill Calibration Calculator for iOS
Download Grain Drill Calibration Calculator for Android

Cost: FREE
A Pocket Guide to Oklahoma Grape Diseases, Insects, and Other Disorders. This guide represents the most common pests of grapes in Oklahoma. Other pests may also exist but are infrequent or isolated in occurrence. Information about reading EPUB documents is available. Released: November, 2019, version 1.0 (Android); ePub version, January, 2020

Download Grape Pocket Guide for Android

Cost: FREE
GrazeOK is a user friendly electronic version of the Oklahoman grazing stick which allows fast and proper estimation of stock density, number of pastures, grazing and rest days by simply measuring plant height and canopy cover with a yard stick and inputting them in your phone. An accompanying YouTube video explaining the app and how to collect data is available. Updated: April, 2017, version 1.2

Download GrazeOK for iOS

Cost: FREE
This application was developed for livestock producers interested in grazing forage crops. Plants listed have been evaluated for safety in regards to metabolic or toxicity issues for multiple classifications of livestock species. All plants will have a score for the usefulness of the plant as grazing forage for livestock. The ranking is based on a 0-4 scale where 0 is not recommended to 4 being highly recommended. The rankings are based on safe consumption of the plant, forage quality, and yield potential. Released: July 28, 2016; updated June, 2017; Version: 1.1

Download Grazing Management Toxic Plants for iOS
Download Grazing Management Toxic Plants for Android

Cost: FREE
The Trimble GreenSeeker handheld crop sensor is an affordable, easy-to-use measurement device that can be used to assess the health - vigor - of a crop in order to make better nutrient management decisions on your farm. Use the GreenSeeker handheld to instantly take a reading of your crop health. Readings can be used to make non-subjective decisions regarding the amount of fertilizer to be applied to your crop, resulting in more effective use of fertilizer - a benefit to your financial bottom line and the environment. Released: January, 2017, version 1.0

Download GreenSeeker Data Logger for Android

Cost: FREE
This application hosts sensor based nitrogen recommendation algorithms which have been developed by researchers in each respective region. The calculations are based upon NDVI values retrieved from the GreenSeeker Sensor. The GreenSeeker is an active light sensor. It would be expected the NDVI from other actives sensors would be similar, but potentially not exactly the same. NDVI from passive sensors or cameras should be used with caution as the same level of calibration that can come from an active sensor is more challenging. Released: December, 2017; Updated March, 2018, version 2.0

Download GreenSeeker N-Rate Calculator for Android
Download GreenSeeker N-Rate Calculator for Android

Cost: FREE
This application is designed for winter wheat and winter canola producers outside of Oklahoma to use to calculate the number of growing days since the crop was planted (GDD>0). This calculation can be used for Sensor Based Nitrogen Management strategies that utilize the GreenSeeker Sensor and N-Rich Strip. Also included in this application is a cumulative Growing Degree Day (GDD) calculator. Crops included in this calculator are: Wheat, Grass hay, Alfalfa, Corn, Cotton, Peanut, Sorghum, and Soybean. The application uses user zip code to identify where temperature data is collected from. Released: May 31, 2016; Version: 1.0

Download Growing Degree Days Calculator for iOS

Cost: FREE
This app allows users to quickly develop and save crop budgets for common Oklahoma field crops. Users can download templates from Oklahoma State University Department of Agricultural Economics as starting points. Updated: September, 2017, version 1.1

Download OSU Crop Budgeting App for iOS
Download OSU Crop Budgeting App for Android

Cost: FREE
A Pocket Guide to Oklahoma Pecan Diseases, Insects, and Other Disorders. This guide represents the most common pests of pecans in Oklahoma. Other pests may also exist but are infrequent or isolated in occurrence. It is important for pecan producers to scout their orchards or groves frequently and observe disease and insect problems. Early identification can reduce negative impacts on tree health and productivity. More information and recommendations for management and control of these pests are available. Information about reading EPUB documents are also available. Released: November, 2019, version 1.0 (Android)

Download Pecan Pocket Guide for Android

Cost: FREE
This app was designed to aid small plot researchers. This app contains a unit converter, area calculator and rate calculator. In this app there are multiple ways to preform unit conversion. The app also calculates the amount of fertilizer material needed per plot, rep, and trial. This is done through the input of the fertilizer nutrient concentration, plot size, number of treatments and reps. This project is supported by Oklahoma Fertilizer Checkoff, Oklahoma Agriculture Experiment Stations and the Oklahoma Cooperative Extension.
Updated: September, 2017, version 1.2

Download Plot Calculator for iOS
Download Plot Calculator for Android

Cost: FREE
This app collects details of burn activities conducted for research. Your answers provide details and useful data that help prescribed fire researchers to determine safe, efficient and effective forms of prescribed burn. Released: October, 2020, version 1.0 (Android); iOS, October, 2020

Download Prescribed Burn Entry Form for iOS
Download Prescribed Burn Entry Form for Android

Cost: FREE
This app is designed as a tool in determining economic nitrogen (N) rates. This calculator determines the return on investment (ROI) of N fertilizer for multiple crops under two different scenarios. Updated: April 12, 2016; Version: 1.1; Requires iOS 8.4 or later. Compatible with iPhone, iPad, and iPod touch.

Download Return on Nitrogen Investment for iOS
Download Return on Nitrogen Investment for Android

Cost: FREE
RxBurnTracker allows the user to monitor fire effects and keep track of prescribed burns.
Release: June 29, 2015; Version: 1.0; Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.

Download rxBurnTracker for iOS

Cost: FREE
This app is designed to aid those who use the Oklahoma State University Soil Water Forage Analytical Laboratory. With this app, users can utilize the internal GPS of their mobile device to log the location that a soil or tissue sample is collected as well as add an ID and description to the site. Updated: May 25, 2016; Version: 1.1; Requires iOS 8.4 or later. Compatible with iPhone, iPad, and iPod touch.

Download Soil Sample Barcode Reader

Cost: FREE
Quickly and easily determine if your sorghum field is suffering from a sugarcane aphid infestation with this app. Its programming uses a presence/absence system to allow for a fast and reliable sampling process. With this app users will be able to make treatment decisions for their field with minimal effort, and the convenience of using your phone." Released: December, 2021, version 1.0

Download Sugarcane Aphid Decision Aid for iOS

Cost: FREE
This app uses the cost of application versus potential loss due to not applying insecticide based upon past research to determine if an insecticide application is economical. Released: February, 2017, version 1.0

Download Sugarcane Aphid Decision Aid for iOS
Download Sugarcane Aphid Decision Aid for Android

Cost: FREE
A Pocket Guide to Oklahoma Turfgrass Diseases, Insects, and Other Disorders. This guide represents the most common turfgrass species found in Oklahoma and pests that affect them. More information and management recommendations are available.  Released: November, 2019, version 1.0 (Android); ePub version, January, 2020

Download Turfgrass Pocket Guide for Android

Cost: FREE
This application is designed to aid producers in the selection of winter wheat variety that best suits their needs. The information used in this application was drawn from the Oklahoma State winter wheat variety testing program. Released: November, 2019, version 1.0 (iOS)

Download Wheat Variety Selection Tool for iOS

Cost: FREE
This app identifies food plot forages that can be planted for wildlife management. For each plant species proper seeding rate and planting recommendations are provided. Lists of desirable plants can be created, saved and sent via email. Updated: March, 2019

Download Wildlife Food Plots for iOS
Download Wildlife Food Plots for Android

Cost: FREE
Sensor based nitrogen rate calculator for winter wheat. Active normalized difference vegetative index (NDVI) sensors are highly accurate in predicting plant biomass. By utilizing biomass produced per day, yield levels of cereal crops can be predicted. By using the predicted yield level, accurate N rates can then be determined from the mid-season NDVI readings. Released: Nov 14, 2013; Version: 1.0; Requires iOS 6.1 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5.

Download Winter Wheat for Android

Director, Information Technology, OSU Agriculture
(405) 744-5536
dwayne.hunter@okstate.edu