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Jason Clark

Assistant Professor & SDSU Extension Soil Fertility Specialist

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
Herd of beef cattle wearing virtual fence collars standing in a field
Dec 08

Managing Soil: Maximizing Profit Meeting & Southeast Research Farm Annual Business Meeting

The Managing Soil: Maximizing Profit Meeting will be held on December 8 from 9:15 a.m. to 3:00 p.m. at the Swan Lake Christian Camp (45474 288th St., Viborg, SD 57070). The Southeast Research Farm Annual Business Meeting will also occur from 12:45 to 1:00 p.m.

Corn plants emerging in a field with cover crops.

Evaluating the Soil Test Phosphorus Level Where No Further Corn Yield is Expected from Phosphorus Fertilization

The objective of this research was to evaluate the accuracy of current South Dakota corn P recommendations in predicting yield increases.

Soybean, wheat and corn plots at the Northeast Research Farm

Soybean Nutrient Management Practices

Survey data were used to examine how local and operational characteristics within South Dakota were related to various nutrient management practices.