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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

Also by Jason Clark

A stunted planting of corn with purple coloring on its leaves.

Fallow Syndrome: What is it and how do I deal with it?

Fallow syndrome received its name from the dry plains states, where fields routinely benefited from the additional moisture available after a year where the ground was fallowed. Corn sometimes had symptoms of phosphorus deficiency when grown on this previously fallowed ground, thus it received its current name, “fallow syndrome.”

man holding a small pile of soil in his hands

Recommended Soil Sampling Methods for South Dakota

Soil testing is your best way to evaluate the fertility status of a field or of areas within a field.

Three South Dakota fields that claimed prevent plant. The first field is planted with a cover crop. The second field has no cover crops, but tillage was completed to control weeds. The third has no cover crops and weeds are growing throughout.

Prevent Plant: Its Effect on Fall and Spring Fertilizing Plans

Driving around South Dakota, you can see the many acres that farmers were not able to plant. Now that fall soil-sampling season is well on its way, many people have questions regarding how different situations of prevented planting will affect soil sampling and fertilizer application needs.