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Jonathan Kleinjan

SDSU Extension Crop Production Associate

605-688-4211

Berg Agricultural Hall 225
Agronomy, Horticulture & Plant Science-Box 2207
University Station
Brookings, SD 57007

Jonathan supports the citizens of South Dakota in his role as the SDSU Extension Crop Production Associate at the South Dakota State University campus in Brookings.

Also by Jonathan Kleinjan

A field of green winter wheat.

Winter Wheat Variety Trial Results

The 2020 winter wheat reports include data from 13 locations with regional summaries.

A field divided into two planting areas. The left area has young corn plants emerging from the soil. The right has no visible corn emergence yet.

2020 Corn Growing Degree Days Update

Spring planting progress of corn in 2020 has been much ahead of a typical year in South Dakota. Crop development, however, seems slow.

aerial view of South Dakota farm and surrounding land

Barley Variety Trial Results

In 2019, Barley trial was planted at one location in South Dakota.