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Potassium

Tractor applies fertilizer to field — Farmers are invited to participate in a new UNL-Nebraska Soybean Board study to evaluate potassium fertilization impacts on crop yield. Participants will receive detailed reports and soil and grain quality results in exchange for their help.

Growers Sought for Potassium Study

September 9, 2024

Boost your yields and refine your practices: Join UNL's potassium fertilization study and gain valuable insights into your soil and crop performance.

Man holding corn and speaking in field — Nathan Mueller, Nebraska Extension water and cropping systems educator, speaks to participants during the 2023 4Rs Nutrient Stewardship Field Day.

Nebraska 4Rs Nutrient Stewardship Field Day Set for July 11

May 16, 2024

This year's 4Rs Field Day will feature a demonstration on UNL's newly developed web-based N tool, designed to increase efficiency of nitrogen use, as well as ease of record-keeping.

The new Fertilizer Recommendation Support Tool, which provides critical phosphorus and potassium soil test values, will soon include a research-based phosphorus or potassium rate response information to assist farmers in selecting the minimum fertilizer rate expected to produce maximal crop yield..

Fertilizer Recommendation Support Tool to Digitize Crop Nutrient Management Launches Nationwide

April 9, 2024

A significant advancement in soil testing, a new web-based fertilizer decision support tool will potentially save farmers millions of dollars annually while reducing excess nutrient losses to the environment.

Patricio Grassini in front of corn field — Patricio Grassini, professor of agronomy and horticulture at Nebraska, is co-leading a two-year project to compile and analyze a comprehensive inventory of global data on potassium for major crop systems around the world. (Photo by Alyssa Amen, NUtech Ventures)

Project to Assemble Global Ag Data on Potassium Deficiencies

December 13, 2023

Potassium-related crop challenges remain poorly understood in many crop-growing regions. A new joint research initiative aims to fill in these knowledge gaps and help producers better address potassium deficiencies.

Researcher kneels in field to gather sample

2024 Soils School to Feature Fundamentals of Soils and Nutrient Management

November 29, 2023

During the two-day school in February, leading experts from the University of Nebraska will present research-based recommendations of primary crop nutrients, including nitrogen, phosphorus and potassium.

4Rs Field Day tent — Nitrogen management with sensor-based fertigation is one of many topics that will be discussed by experts from the University of Nebraska-Lincoln and Iowa State University during the 2023 4Rs Nutrient Stewardship Field Day.

Nebraska 4Rs Nutrient Stewardship Field Day Set for July 6

April 27, 2023

This year’s 4Rs Field Day will focus on up-to-date research information and demonstrations on all three major crop nutrients: nitrogen, phosphorus and potassium.

Nebraska NRCS soil survey map of K-feldspar

Soil Potassium Availability: The Roles of Manure, Irrigation and Potassium Feldspar

December 17, 2019

Why do Nebraska soils tend to have high potassium (K) availability, even with high yields and often without fertilizer K application? Why are yield responses to fertilizer-K infrequent?

What’s New with K Fertilizer Use?

April 5, 2018

Three studies with a total of 50 trials applying K at various rates to corn verified that the likelihood of a profitable response is very low if the soil test level is above 125 ppm.