Richard T Roth

Dr. Richard Roth is an Assistant Professor and Extension Soil fertility Specialist at Iowa State University.  He joined the Department of Agronomy and at Iowa State in September 2023. His primary responsibilities are nitrogen and sulfur management. Dr. Roth's research and extension work focuses on engineering and optimizing nitrogen and sulfur management strategies to improve the efficiency and environmental sustainability of cropping systems in the Midwest. He is dedicated to enhancing the agronomic, economic, and environmental performance of these systems.

Dr. Roth holds a Ph.D. in Agronomy from Purdue University, which he earned in 2021. He also completed his bachelor's and master's degrees in Crop and Soil Science at Illinois State University. Prior to joining Iowa State University, Dr. Roth was an assistant professor and the extension grains and oilseeds agronomist in the Department of Crop and Soil Sciences at the University of Georgia.

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October 30, 2024 12:29 AM

The crops are coming out and it’s ALMOST time for farmers to start making fall nitrogen applications. Remember that soil temperatures should be below 50°F at a depth of 4 inches and continuing to drop before making fall nitrogen applications —ideally, the cooler, the better. It's important for...

Soil Fertility
October 9, 2024 10:30 AM

This article is part three in a series of blogs on how best to allocate fertilizer dollars.

With low commodity prices, it is very important to make wise fertilizer application decisions. While the secondary macronutrient sulfur (S) used to be adequately supplied through atmospheric...

Crop Production, Soils, Soil Fertility
May 28, 2024 8:26 PM

This is part one of a three-part series on nitrogen management this spring. Read part two, “Navigating Nitrogen Management in Wet Spring...

Crop Production, Soil Fertility
May 28, 2024 5:11 PM

This is part three of a three-part series on nitrogen management this spring. Read part one “Navigating Nitrogen Management in Wet Spring...

Crop Production, Soil Fertility
May 28, 2024 4:55 PM

This is part two of a three-part series on nitrogen management this spring. Read part one, “Navigating Nitrogen Management in Wet Spring...

Crop Production, Soil Fertility