Pick up know-how for tackling diseases, pests and weeds.
Farm bill, farm marketing, agribusiness webinars, & farm policy.
Find tactics for healthy livestock and sound forages.
Scheduling and methods of irrigation.
Explore our Extension locations around the state.
Commercial row crop production in Arkansas.
Agriculture weed management resources.
Use virtual and real tools to improve critical calculations for farms and ranches.
Learn to ID forages and more.
Explore our research locations around the state.
Get the latest research results from our county agents.
Our programs include aquaculture, diagnostics, and energy conservation.
Keep our food, fiber and fuel supplies safe from disaster.
Private, Commercial & Non-commercial training and education.
Specialty crops including turfgrass, vegetables, fruits, and ornamentals.
Find educational resources and get youth engaged in agriculture.
Gaining garden smarts and sharing skills.
Timely tips for the Arkansas home gardener.
Creating beauty in and around the home.
Maintenance calendar, and best practices.
Coaxing the best produce from asparagus to zucchini.
What’s wrong with my plants? The clinic can help.
Featured trees, vines, shrubs and flowers.
Ask our experts plant, animal, or insect questions.
Enjoying the sweet fruits of your labor.
Herbs, native plants, & reference desk QA.
Growing together from youth to maturity.
Crapemyrtles, hydrangeas, hort glossary, and weed ID databases.
Get beekeeping, honey production, and class information.
Grow a pollinator-friendly garden.
Schedule these timely events on your gardening calendar.
Equipping individuals to lead organizations, communities, and regions.
Guiding communities and regions toward vibrant and sustainable futures.
Guiding entrepreneurs from concept to profit.
Position your business to compete for government contracts.
Find trends, opportunities and impacts.
Providing unbiased information to enable educated votes on critical issues.
Increase your knowledge of public issues & get involved.
Research-based connection to government and policy issues.
Support Arkansas local food initiatives.
Read about our efforts.
Preparing for and recovering from disasters.
Licensing for forestry and wildlife professionals.
Preserving water quality and quantity.
Cleaner air for healthier living.
Firewood & bioenergy resources.
Managing a complex forest ecosystem.
Read about nature across Arkansas and the U.S.
Learn to manage wildlife on your land.
Soil quality and its use here in Arkansas.
Learn to ID unwanted plant and animal visitors.
Timely updates from our specialists.
Eating right and staying healthy.
Ensuring safe meals.
Take charge of your well-being.
Cooking with Arkansas foods.
Making the most of your money.
Making sound choices for families and ourselves.
Nurturing our future.
Get tips for food, fitness, finance, and more!
Understanding aging and its effects.
Giving back to the community.
Managing safely when disaster strikes.
Listen to our latest episode!
April 17, 2020
By Fred MillerU of A System Division of Agriculture@AgNews479
Download MS Word version
Download related PHOTOS: https://flic.kr/s/aHsmMDk935
Crop production publications: https://www.uaex.uada.edu/farm-ranch/crops-commercial-horticulture/default.aspx
FAYETTEVILLE, Ark. — Potassium, or potash, is an important nutrient for Arkansas’
major row crops, and a deficiency of it can significantly reduce yields at harvest.
A video, “Potassium Deficiency in Row Crops,” from the University of Arkansas System
Division of Agriculture explains the importance of potassium fertilizer to Arkansas
crops and how growers can make sure their plants have enough of the nutrient to maximize
their yield potentials.
The video can be seen here: https://youtu.be/ywdwj4uiGmw
Potassium aids in water regulation in plants, said Trent Roberts, associate professor
of crop, soil and environmental sciences for the Division of Agriculture.
“It’s essential for a lot of the pathways tied to water and water regulation,” Roberts
said, “including transpiration, canopy temperature, carbon dioxide capture, and others.”
Nitrogen fertilizer is often the focal point of most row crop systems, and potassium
is sometimes neglected. “We know if we don’t put sufficient nitrogen on our crops
we can’t expect to maximize the yields,” Roberts said. “But most row crops need as
much or more potassium in their above-ground tissue as nitrogen.”
Inadequate potassium nutrition can limit yields, similar to inadequate nitrogen, Roberts
said. And for legumes, like soybeans, which absorb nitrogen from the air and convert
it into a nutrient through nitrogen fixation, potassium becomes the most important
fertilizer nutrient for most legumes to ensure optimum yields.
Roberts said light textured soils, like silt loam and sandy soils, tend to be potassium
deficient. “These are the ones where proper potassium management is going to be most
crucial,” he said.
Clay soils usually have adequate soil-test potassium for Arkansas crops.
“The first step to detecting and correcting potassium deficiency is soil testing,”
Decades of research by the Arkansas Agricultural Experiment Station, the Division
of Agriculture’s research arm, has resulted in calibrated soil test-based data that
allows the Soil Testing and Research Laboratory to provide accurate fertilizer recommendations,
Roberts said. Soil testing, available from the Division of Agriculture’s Soil Testing
Program can help growers know how much potash they need to apply before planting their
“This is the first step to ensuring that potassium will not be limiting and helps
get the crop off on the right foot,” Roberts said.
Roberts said farmers should contact their county extension offices to obtain soil
testing information, supplies and services.
Growers should follow up during the growing season by scouting their fields to look
for signs of potassium deficiency, but beware of “hidden hunger,” Roberts said. Insufficient
potassium can cause yield-limiting deficiencies in crops before visible symptoms appear.
Hidden hunger can be avoided by testing tissue samples from crop plants to identify
potassium deficiencies during plant growth, Roberts said. These can be submitted for
analysis through the county extension offices and will let farmers know if mid-season
potash applications are needed.
Often, Roberts said, yields can be recovered if potassium deficiency is detected early
in the season and corrected with mid-season potash applications.
In the “Potassium Deficiency in Row Crops” video, Roberts gives more detailed information
about the effects and symptoms of deficiency in corn, rice, cotton and soybeans, how
to scout for symptoms and ways to avoid or correct it.
The video is available online: https://youtu.be/ywdwj4uiGmw
Roberts said more information on potassium management can be found in Division of
Agriculture fact sheets and crop handbooks. These are available for download from
the Cooperative Extension Service: https://www.uaex.uada.edu/farm-ranch/crops-commercial-horticulture/default.aspx
Funding support for the video and potassium research was provided by the Arkansas
Fertilizer Tonnage Fees, Arkansas Rice Checkoff, Arkansas Soybean Checkoff, and Arkansas
Corn and Grain Sorghum Checkoff programs.
A second video focusing on the more complex interactions of potassium in soybeans
will be available soon, Roberts said.
To learn more about Division of Agriculture research, visit the Arkansas Agricultural
Experiment Station website: https://aaes.uark.edu. Follow us on Twitter at @ArkAgResearch and Instagram at ArkAgResearch.
To learn about extension programs in Arkansas, contact your local Cooperative Extension
Service agent or visitwww.uaex.uada.edu. Follow us on Twitter at @UAEX_edu.
About the Division of Agriculture
The University of Arkansas System Division of Agriculture’s mission is to strengthen
agriculture, communities, and families by connecting trusted research to the adoption
of best practices. Through the Agricultural Experiment Station and the Cooperative
Extension Service, the Division of Agriculture conducts research and extension work
within the nation’s historic land grant education system.
The Division of Agriculture is one of 20 entities within the University of Arkansas
System. It has offices in all 75 counties in Arkansas and faculty on five system campuses.
The University of Arkansas System Division of Agriculture offers all its Extension
and Research programs and services without regard to race, color, sex, gender identity,
sexual orientation, national origin, religion, age, disability, marital or veteran
status, genetic information, or any other legally protected status, and is an Affirmative
Action/Equal Opportunity Employer.
Media Contact: Fred MillerU of A System Division of AgricultureArkansas Agricultural Experiment Station(479) firstname.lastname@example.org