Crop Nutrition Apps

The number of mobile applications (e.g. Apps) developed and offered to support nutrient management continues to grow. Many of these Apps can provide important information at the farm level. The following list of Apps represents many used by farmers or their agronomic consultants to help with nutrient management including planning, scouting, evaluating stress, and executing field applications. This list is not comprehensive but provides common and mostly free Apps.

Nutrient Information and Calculators

App	Details
Fertilizer Removal by Crop	Available from: Ag PhD Operating system: Android / iOS Description: A guide to discovering the vital nutrient amounts critical to attaining optimum yield for the selected crop. Save result and use for later reference. Cost: Free Account needed? No
Ag PhD Deficiencies	Available from: Ag PhD Operating system: Android / iOS Description: A guide to identifying fertility issues in the field. Content includes a complete list of photos and descriptions of the nutrient deficiencies in a variety of crops. Cost: Free Account needed? No
HumaGro	Available from: Bio Huma Netics Inc. Operating system: Android Description: Calculate nutrition products and application rates based on lab analysis and info sheets. View fact sheets to allow for easy calculations, and save calculations for later and access product technical documents. Cost: Free Account needed? No
Fertilizer Blend Calculator	Available from: Wilde Brothers Farms Ltd. Operating system: iOS Description: A calculator to determine the proper fertilizer blend weights and costs as well as various weights and volumes of net elements in the blend. Cost: $4.99 Account needed? Yes
Yara CheckIT	Available from: Yara International ASA Operating system: iOS Description: Quickly identify possible nutrient deficiencies. CheckIT has been designed to operate in rural locations with low signal strength. Cost: Free Account needed? Yes
Crop Nutrient Removal Calculator	Available from: International Plant Nutrition Institute Operating system: iOS Description: Estimate crop nutrient removal for a variety of crops. Cost: Free Account needed? No
Farm Calculators	Available from: Dr. Vishwanath Koti Operating system: Android Description: Calculate fertilizers (NPK), pesticides, fungicides, herbicides, plant population, seed rate, and seed blending to ensure optimal yields. Cost: Free Account needed? No
NPK Credits – Manure & Legume Nutrient Credit Calculator	Available from: University of Wisconsin Nutrient and Pest Management Program Operating system: Android / iOS Description: Calculate the plant-available nitrogen (N), phosphorus (P2O5), potassium (K2O), and sulfur (S) nutrient credits of manure from various livestock species that are applied to cropland fields. One can also calculate the N credit available to crops that follow forage legumes in the rotation. Cost: Free Account needed? No
Corn N Rate Calculator	Available from: University of Wisconsin Nutrient and Pest Management Program Operating system: Android / iOS Description: Assists producers in selecting a nitrogen (N) rate that improves profitability when nitrogen and corn prices fluctuate. Cost: Free Account needed? No
N Price Calculator	Available from: University of Wisconsin Nutrient and Pest Management Program Operating system: Android / iOS Description: Converts the price of individual nitrogen fertilizer sources from price per ton to price per pound of N. Cost: Free Account needed? No
Fertilizer Calculator n2f	Available from: ICAR CCARI Operating system: Android Description: Calculate nutrient-to-fertilizer values completely offline. Cost: Free Account needed? No
Fertilizer Mixing Calculators	Available from: FKmicro.com Operating system: Android Description: Access fertilizer facts instantly on Android. Reduce cost with our mobile app to get knowledge like a fertilizer manufacturer on your hand phone, easy to use, make sense, everyone can use. Cost: Free Account needed? No
Blend Calculator	Available from: Travis Redpath Operating system: Android Description: Calculates the fertilizer blend and the total application rate needed to apply the required amount of nitrogen, phosphate, potash, and sulphate. The products can be changed to whatever ratios you want to use. Cost: Free Account needed? No
GreenSeeker Data Logger	Available from: Oklahoma State University Operating system: Android Description: Supports data collecting of NDVI data with a Trimble GreenSeeker handheld crop sensor. *Requires GreenSeeker handheld sensor for data collection.  Cost: Free Account needed? No
SoluDrip (Just in Time Crop Nutrition)	Available from: Vital Fertilizers Operating system: Android / iOS Description: Find the exact amount of nutrition for the crop at whichever stage of its life it’s at. *Primarily used for vegetable production. Cost: Free Account needed? No
MRTN/Nitrogen Application Calculator	Available from: University of Illinois Operating system: iOS Description: The Maximum Return To Nitrogen (MRTN) calculations combine the agronomics of nitrogen rate research and the realities of economic fluctuations to provide a customized nitrogen rate. Cost: Free Account needed? No
Fertilizer Cost Calculator	Available from: Jeffrey Abbott Operating system: Android / iOS Description: Estimates the value of nitrogen per unit of phosphorus source, along with the cost per unit of P2O5 with or without the nitrogen value. All calculations based on entered cost per bulk. Cost: Free Account needed? No
Potato Potassium Calculator	Available from: Great Salt Lake Minerals Operating system: Android Description: Potato Uptake Calculator can be used to estimate how much potassium your potatoes remove from the ground and how much you need to apply to replenish the loss. Cost: Free Account needed? No
Alfalfa Potassium Calculator	Available from: Great Salt Lake Minerals Operating system: Android Description: Use the Alfalfa Uptake Calculator to estimate how much potassium your alfalfa crops remove from the ground and how much you need to apply to replenish the loss. Cost: Free Account needed? No
Illinois Manure Calculator (Beta)	Available from: Move Creative Operating system: Android / iOS Description: Developed for the Illinois-specific manure plan rules, enabling a livestock producer to quickly balance manure applications with field crop nutrient needs. It automates the planning worksheet that Illinois livestock producers learn in the Certified Livestock Manager Training workshops. Cost: Free Account needed? No
Spread Charts	Available from: BOGBALLE A/S Operating system: Android / iOS Description: The BOGBALLE Spread Charts app will give you quick access to our online database with thousands of available spread charts for your BOGBALLE fertilizer spreader. Cost: Free Account needed? No
Organic Calc	Available from: minskaysoft Operating system: iOS Description: Check and adjust the application rate, while working with a manure spreader or slurry tank. With the built-in GPS receiver of the iPhone, one can measure the distance and the resulting surface, just by pressing a button while driving. Measurement disruptions are also possible. Cost: $8.99 Account needed? No
Nitrogen Index	Available from: USDA-ARS Operating system: Android Description: The Nitrogen Index App can be used to quickly make assessments of the effects of management decisions on nitrogen use efficiencies. Cost: Free Account needed? No
Echelon	Available from: Agrian Inc. Operating system: iOS Description: Mobile companion to the web application that provides crop advisors, consultants, and growers with a suite of precision agronomy and compliance tools. Cost: Free Account needed? Yes
TigerSul	Available from: Tiger-Sul Products LLC Operating system: Android / iOS Description: The Tiger-Sul Nutrient Calculator is an agronomic planning tool for farmers to plan fertilizer applications and meet soil nutrient needs. Users select a crop and the desired yield for that crop; and are given the amount of crop nutrients that will be needed. The nutrient calculator covers all key crops including corn, canola, and soybeans. Cost: Free Account needed? No
AgriSpread	Available from: Armour Interactive Operating system: Android / iOS Description: The rate table feature allows the user to search application rate charts for the appropriate machine settings based on spread width, required rate, and fertilizer type. A second feature, the fertilizer application rate calculator is also included, enabling the farmer to carry out a physical testing procedure to check the actual rate. Cost: Free Account needed? No
CAT	Available from: BASF plc Operating system: iOS Description: The BASF CAT is a tool designed to help Farmers and Crop Advisors protect the yield of winter cereals by assessing crop nitrogen content and crop lodging risk. Cost: Free Account needed? No
ATP R3 App	Available from: Sherpa Digital Operating system: Android / iOS Description: This app incorporates the latest in plant nutrition research to identify important nutrients across all stages of crop growth, understand the role nutrients play, identify products to increase crop health and yield, understand required rates and tank mix compatibilities, view photos of deficiency symptoms, and view nutrient uptake and removal levels. Cost: Free Account needed? No
FertiMatch	Available from: Haifa Group Operating system: Android / iOS Description: Determine the right amount of fertilizers needed to get a desired nutritional composition. The grower inserts details about their fertigation control head, defines a reference element and concentration, and selects fertilizers. The output simply tells what quantity of fertilizer is needed, and what will be the concentration of nutrients in the irrigation water. Cost: Free Account needed? No
Teagasc	Available from: Teagasc Operating system: Android / iOS Description: Provides access to selected Teagasc information and in-App calculators. It is an interactive tool that farmers can use to track fertilizer usage against their fertilizer plan. Track yearly allowances, purchases, and opening stock to keep a record of nutrient purchases. Cost: Free Account needed? No
Manure Valuator	Available from: University of Arkansas Operating system: Android / iOS Description: Helps producers calculate the dollar and nutritive value of manure and allow them to share results via email. Users have access to a bulk cost calculator to determine cost per pound of nitrogen, phosphorus, and potassium from inorganic fertilizers and a database consisting of nutritive value of 18 different sources of manure, which allows user input for custom values for wet and dry manures. Cost: Free Account needed? No
Cow Poop Analyzer	Available from: Texas A&M AgriLife Extension Service Operating system: Android / iOS Description: Cow poop photographs are compared with stock photos to determine the approximate crude protein and digestibility of forage/food. Cost: Free Account needed? No
Ammonia Loss	Available from: Oklahoma State University Operating system: iOS Description: Accurate estimates of ammonia volatilization losses from surface applications of urea in agriculture. Estimates are in percent of the total N rate applied. Cost: Free Account needed? No
GreenSeeker N Rate Calc	Available from: Oklahoma State University Operating system: iOS Description: 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 active sensors would be similar, but potentially not exactly the same. Cost: Free Account needed? No
Return on Nitrogen Investment	Available from: Oklahoma State University Operating system: iOS Description: 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. The first scenario is that yield fertilized for is not realized. The other scenario is if the producer underfertilizes for the environment. Cost: Free Account needed? No
North Dakota Crop Nitrogen Calculator	Available from: North Dakota State University Operating system: Android / iOS Description: This application provides three NDSU crop nitrogen recommendation calculators for use in North Dakota corn, spring wheat, and corn, respectively. Nitrogen recommendation calculations are based on an economic production function that takes into account the yield response of the crop to added N, less the cost of the N. The recommendation is based not only on the yield increase from additional N, but the price of the commodity and the cost of N. Cost: Free Account needed? No
Canola Starter	Available from: Oklahoma State University Operating system: Android / iOS Description: 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. Cost: Free Account needed? No
NPK FieldGuide	Available from: Oklahoma State University Operating system: iOS Description: 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. Cost: Free Account needed? No
Wheat SBNRC	Available from: Oklahoma State University Operating system: Android / iOS Description: Sensor based nitrogen N 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. Cost: Free Account needed? No

Equipment Setup

App	Details
ApplyPlus	Available from: John Deere Operating system: Android / iOS Description: Provides the ability to optimize machine set-up and maintenance procedures. Currently for 4 Series JD sprayers. Cost: Free Account needed? Yes
AgLogic Mobile	Available from: John Deere Operating system: Android / iOS Description: A complete logistics solution for custom application that syncs with the AgLogic web application. *Requires license to activate account. Cost: Free Account needed? Yes
Rauch Fertilizer Chart	Available from: RAUCH Landmaschinenfabrik GmbH Operating system: Android / iOS Description: Provides spreading charts for current and older RAUCH fertilizer spreaders. Cost: Free Account needed? Yes
New Leader Mobile	Available from: New Leader Operating system: Android / iOS Description: Assists users and dealers in conducting a conveyor or catch calibration and determines calibrated CFR or Constant Number. Determines initial settings based off product characteristics. Cost: Free Account needed? Yes

Nozzle and Orifice Selection

App	Details
TeeJet SpraySelect	Available from: TeeJet Technologies Operating system: Android Description: Enter speed, spacing and target rate, select the drop size category; a list of tips that will work is generated. Cost: Free Account needed? Yes
Spray It	Available from: Pentair Flow Technologies LLC Operating system: Android / iOS Description: Select the chemical company and name of the chemical applying, a nozzle to use based on the application information on the label will be recommended. Growers can also input application rate, speed, and nozzle spacing and a nozzle size for that specific application will be recommended. Cost: Free Account needed? No
Kuhn-Nozzle Configurator	Available from: KUHN Operating system: Android Description: Select the correct sprayer nozzle for specific application requirements, such as working speed, flow rate, etc. Cost: Free Account needed? No
Spray Tips Guide	Available from: Ag PhD Operating system: Android / iOS Description: A guide to select the proper nozzle for the equipment being used. Select nozzle by chemical company or name of the chemical being applied and receive suggestions based on the label application information. Change the application rate, speed, and nozzle spacing for more precise suggestions. Cost: Free Account needed? No

Record Keeping

App	Details
OnMRK	Available from: KCFB & KSWCD Operating system: Android / iOS Description: Enter the fertilizer type, rate, amount applied, total acres, soil conditions, application method, weather conditions when applied, using a tablet or smartphone. *Desktop version is needed. *Must have a Certified Applicator ID to register. Cost: Free Account needed? Yes
Critical Records of Production (C.R.O.P.)	Available from: Utah State University Operating system: Android / iOS Description: Track important crop production records, such as crop history, yields, fertilizer applications, pesticide applications, and irrigation events. Cost: Free Account needed? No
Pesticide and Field Records	Available from: Iowa State University Operating system: Android / iOS Description: Record and maintain pesticide applications, link to specific field locations using satellite mapping, and keep other important crop production information with the Pesticide and Field Records app. Cost: Free Account needed? No
AgDNA	Available from: AgDNA Operating system: Android / iOS Description: Provides farm planning, record keeping, boundary mapping, worked area mapping, live equipment tracking, scouting observations, communication tools, data sharing and more. All data is synchronized with a free online AgDNA account allowing activity records and setup details to be viewed from a web browser or any other AgDNA enabled device. Cost: Free Account needed? Yes
Farm At Hand	Available from: Farm At Hand Inc. Operating system: Android / iOS Description: Track and schedule all field activities with precision. Manage your fleet on the go and follow all equipment details, maintenance logs, and part numbers. Cost: Free Account needed? Yes

Soil Sampling

App	Details
AgWorld Sampling	Available from: AgWorld Operating system: iOS Description: Agworld soil collectors can easily view, complete, and submit sampling jobs assigned to them. *Note: This app requires a precision enabled Agworld account. Cost: Free Account needed? Yes
Ag PhD Soils	Available from: Ag PhD Operating system: Android / iOS Description: Fast and accurate soil test tool. Lab results come in 5–7 days, aerial imagery of your field, test as much as you want, and pay as you test. Generate variable rate prescriptions, download recommendations and controller files. *Pay to have soil tests sent to Midwest Laboratories. Cost: Free Account needed? No
360 Soilscan	Available from: 360 Yield Center Operating system: iOS Description: A portable soil lab that provides soil nitrate and pH analysis to enable more accurate and timely nutrient management. Cost: Free Account needed? Yes
Sirrus	Available from: SST Software Inc. Operating system: iOS Description: Manage the soil on your fields efficiently and with precision. Sirrus for iPad has what is needed for intensive soil sampling services so you can make informed fertility decisions. Upgrade to Premium to edit recommendations in the field and to make treatment adjustments. Cost: Free Account needed? Yes
Soil Test Pro	Available from: TapLogic, LLC Operating system: Android / iOS Description: Use Soil Test Pro to order soil sampling supplies, pull precision soil samples, choose a lab from our recommended list, and ship your samples. Cost: Free Account needed? Yes
Sampling Pro 2.0	Available from: CSBP Limited Operating system: Android / iOS Description: Submit your CSBP Soil and Plant sample at the tap of a button. Send your soil and plant sample information straight to the CSBP lab, record your GPS coordinate and view location on Google Maps. Built-in barcode scanner to match each sample bag with the app’s Paddock Information Form. Cost: Free Account needed? Yes

Field Data Management

App	Details
Ohio State PLOTS	Available from: OCV, LLC Operating system: Android / iOS Description: Create replicated on-farm trials to compare hybrids, fertilizer rates, stand counts, and more. Provides statistical comparisons and summary reports. Cost: Free Account needed? No
FieldView	Available from: The Climate Corporation Operating system: Android / iOS Description: Connected suite of digital ag tools. Tracks rainfall, field health, nitrogen status, yield analysis, and recent activities. Includes delivery of weather information. Paid subscription required to access some functionality. Cost: Free Account needed? No
FieldView Cab	Available from: The Climate Corporation – US  Operating system: Android / iOS Description: Digital tool for visualizing planter and harvest field data while supporting field scouting, imagery, and soil data layers. Cost: Free Account needed? No

News and Information

App	Details
AgriGold We Know Corn	Available from: AgReliant Genetics, LLC Operating system: iOS Description: View crop and soil research studies, periodicals, and videos; it can also send results of yields instantly through email and much more. Cost: Free Account needed? No
AgWeb News & Markets	Available from: Farm Journal, Inc. Operating system: Android / iOS Description: Provides the latest agribusiness news and advice. Read ag management news, farm business blogs and articles from one trusted source. Cost: Free Account needed? No
Farm Futures	Available from: iNet Solutions Group Operating system: Android / iOS Description: The power of Farm Futures magazine in an app! This enhanced mobile presentation of the leading management-oriented farm magazine features enhanced user-customized markets, market commentary, news and audio updated every business day. Cost: Free Account needed? No
agIndex	Available from: Monsanto Company Operating system: Android / iOS Description: Get all the markets, weather, news, and exclusive agronomic advice, in one quick-to-read dashboard. Receive push notifications customized to your location and crop portfolio to keep up with commodity pricing and insect and weather alerts. Cost: Free Account needed? No
Real Agriculture	Available from: RealAgriculture.com Operating system: Android / iOS Description: RealAgriculture is focused on the issues that are impacting agriculture. The app allows you to pick interests that are important to your operation and only see articles related to your interests. You can also save articles to read later or for offline reading. Cost: Free Account needed? No
Ag Mobile	Available from: Barchart Operating system: Android Description: The AgMobile app is a collaboration of AgriCharts (a division of Barchart) and Successful Farming. Access commodity markets, news, and weather on-the-go from the convenience of your mobile device. Cost: Free Account needed? No
Farm Journal On-Air	Available from: Farm Journal, Inc Operating system: Android / iOS Description: Source for AgriTalk, AgDay, Market Rally, U.S. Farm Report, Machinery Pete TV, and so much more. Watch and listen to full episodes or find your favorite highlights and the latest news. Cost: Free Account needed? No
Brownfield	Available from: Brownfield Ag News Operating system: Android / iOS Description: Provides instant access to customized weather and futures market prices, as well as the latest agriculture news, and unique audio updates from the Brownfield Ag. Cost: Free Account needed? No
Argus Publications	Available from: Argus Media Group Operating system: Android / iOS Description: Provides access to critical market reporting and pricing. *Must have subscription or trial with Argus Direct account login. Cost: Free Account needed? Yes
Gavilon Grain	Available from: iNet Solutions Group, Inc. Operating system: Android / iOS Description: Up-to-date weather, cash bids, news and market information provided by your local Gavilon facility. Cost: Free Account needed? No
Growers Edge	Available from: iNet Solutions Group, Inc. Operating system: Android / iOS Description: Access weather pinpointed to an individual field while locating best cash price bids within 100 miles of a location. Users can also receive local market commentary and ag news, compare risk management options, and fully utilize the Profit Manager tool to establish profit goals, edit input costs, record marketing transactions, and track profit by crop and year. Cost: Free Account needed? Yes
Farm Progress	Available from: iNet Solutions Group, Inc. Operating system: Android / iOS Description: Keep up on local ag news, grain and livestock markets, enhanced weather and blogs. The app automatically directs one to the right local Farm Progress website, or you can choose your favorite. Cost: Free Account needed? No
AgWired	Available from: ZimmComm New Media Operating system: Android / iOS Description: AgWired is an online community for everyone involved in agricultural marketing and communications, including farmers, ranchers, agribusiness, farm groups, ag media, freelancers, and advertising and public relations agencies. Cost: Free Account needed? No
CVA Coop	Available from: Cvacoop IT Operating system: Android / iOS Description: The CVA Coop app brings you real-time cash bid and futures prices, in addition to updated weather and the latest agricultural news. Cost: Free Account needed? No
FarmWeek	Available from: iNet Solutions Group, Inc. Operating system: Android / iOS Description: Provides farmers with the latest information about agriculture from the staff at FarmWeek, RFD Radio Network, and Illinois Farm Bureau’s News and Communications division. Cost: Free Account needed? No

Weather

App	Details
The Weather Channel	Available from: The Weather Channel Operating system: Android / iOS Description: View local and national forecasts, current weather conditions, and weather maps. Cost: Free Account needed? No
AccuWeather: Weather Forecast & Real Time Reports	Available from: Accuweather Operating system: Android / iOS Description: View minute-by-minute precipitation forecast, hyper-localized to your farm and field. Cost: Free Account needed? No
Weather Underground: Forecasts	Available from: Weather Underground Operating system: Android / iOS Description: View hyper-local weather forecasts in addition to interactive radar, satellite maps, and severe weather alerts. Cost: Free Account needed? No
Weather by WeatherBug	Available from: WeatherBug Operating system: Android / iOS Description: Provides fast weather alerts while viewing real-time weather conditions and hourly forecasts. Cost: Free Account needed? No

Area Apps

App	Details
GPS Fields Area Measure	Available from: Studio Noframe Operating system: Android / iOS Description: Provides area, distance, and perimeter measurement and management. Easily share maps and acreage information. Cost: Free Account needed? No
Planimeter – Measure Land Area & Distance on a Map	Available from: Core Signals Operating system: Android / iOS Description: Measure fields, circular regions, paths and perimeters. Add markers to pinpoint locations. Cost: $7.99 Account needed? Yes

Acknowledgments
Thank you to the reviewers (Dr. Bruce Erickson–Purdue University, Dr. Brian Arnall–Oklahoma State University, Jason Hartschuh, Mike Estadt, Andrew Klopfenstein–The Ohio State University, David Scheiderer and J.D. Bethel–Integrated Ag Services) that have provided constructive feedback on this publication.

Visit The Ohio State University’s Precision Agriculture website http://precisionag.osu.edu and Agronomic Crops Network https://agcrops.osu.edu/ for additional information on nutrient management and stewardship.