Nutrient Management

There are dozens of types of biostimulants, each with their unique properties and benefits to crop health. Photo courtesy of Adobe Stock/S. Leitenberger.

Understanding Biostimulants and Their Tie to Soil Fertility

September 6, 2023

Figure 1. The optimal potassium rate in corn with a quadratic plateau model (y = a + bx + cx2 ).

Big Data and Machine Learning: What Is It and Can We Use It for 4R Nutrient Management?

July 19, 2023

Photo courtesy of Adobe Stock/zequinao.

‘Snake Oil’ or ‘Viper Lipid'? How to Get the Most Out of Your Biostimulant

May 22, 2023

Winter wheat harvest across the Pacific Northwest is often referred to as the “end of the season” with farmers calculating yields and assessing quality grades. It is important to assure you have representative samples for grain protein or make sure your local co-op will provide this data on your grade sheets.

Nitrogen Uptake Efficiency: A Measurement for Improving Nutrient Management in Wheat

May 17, 2023

Biologicals come in a range of colors and formulations, providing multiple opportunities for grower incorporation into their existing man- agement programs. However, each product is unique, and it is essential to understand the type of product one is working with to best position the application for success. Photo by Carolyn Opperman.

Role of Biologicals in Enhancing Nutrient Efficiency in Corn and Soybean

March 20, 2023

Figure 1. The potassium nutrient cycle, showing the major pools and flows of K in the soil–crop system (Source: Mikkelsen & Roberts, 2021).

Assessing Soil Potassium: Basic Principles and New Developments

March 7, 2023

From 2013 through 2022, the 4R Research Fund provided around $8 million to support 39 projects. Stars indicate projects ongoing.

4R Research With Impact

January 16, 2023

Figure 2. Spray application of a suspension of fine elemental S particles (Sulgro 70). Photo courtesy of Murray MacKinnon, Sultech.

Efficacy of Elemental Sulfur Fertilizers

January 4, 2023

Soybeans with 20 lb sulfate sulfur per acre applied prior to emergence (left) and without S (right). Photo by Shaun Casteel, Purdue University.

Correcting Sulfur Shortages in Midwest Soils

January 2, 2023

Sharing data on 4R practices can boost public confidence in farming outcomes.

Nutrient stewardship: Taking 4R further

December 27, 2021

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