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Jonathan Kleinjan

SDSU Extension Agronomist

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 an SDSU Extension Agronomist at the South Dakota State University campus in Brookings.

Also by Jonathan Kleinjan

Winter wheat test plots with numerous groups of green wheat plants growing throughout.

2021 Draper Winter Wheat Meeting Set for Aug. 26

August 13, 2021

The Jones County Crop Improvement Association, along with South Dakota State University Extension will be hosting the 32nd annual Winter Wheat Meeting in Draper, South Dakota on Aug. 26.

A soybean field with green soybeans and patchy yellow areas.

'Science for Success: Notes From the Field' Resumes Aug. 6

July 29, 2021

South Dakota growers and agribusiness professionals are invited to join soybean research and Extension specialists from land-grant universities across the country as they host the webinar series, "Science for Success: Notes From the Field."

two men standing in front of test plots of wheat
Jun 24

2021 Dakota Lakes Research Farm Field Day

South Dakota State University’s Dakota Lakes Research Farm will host Field Day on June 24.