Jason Clark

Assistant Professor & SDSU Extension Soil Fertility Specialist

Jason Clark
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605-688-4395

Berg Agricultural Hall 310
Agronomy, Horticulture & Plant Science-Box 2207A
University Station
Brookings, SD 57007

Soil fertility guidelines for South Dakota cropping systems

State & Regional Offices

SDSU Campus

Also by Jason Clark

Oats growing in a no-till field.

Updating Oat Nitrogen Fertilizer Rate Recommendations in South Dakota

Research trial results for nitrogen fertilizer rate recommendation for oats in South Dakota.

Aerial view of the SDSU Northeast Research Farm.
Jan      Feb 06 - 26

Crop Hour

SDSU Extension Crop Hour webinars provide valuable information for South Dakota crop producers to help them improve their profitability and prepare for the upcoming season.

Producer holding soil in cupped hands over a bare field in early spring.

80 South Dakota farmers needed for nationwide soil health project: Enroll today

April 03, 2025

South Dakota State University Extension is inviting South Dakota farmers to participate in a new soil health survey.

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