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Oplinger, E.S
Warner, A
Wright, R.J
Bhandari, A.B
Tarkalson, D.D
Pittelkow, C
Sible, D
Hayden, Z
Cook, R.L
Clover, M.W
Zandvakili, O
Specht, J
Haq, M.U
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Authors
Harms, C.L
Beuerlein, J.E
Oplinger, E.S
Tarkalson, D.D
Hergert, G.W
Stevens, W.B
Petersen, J.L
McCallister, D.L
Walters, D.T
Dobermann, A
Cassman, K.G
Drijber, R
Lindquist, J
Specht, J
Yang, H
Clover, M.W
Mallarino, A.P
Barbagelata, P.A
Zucco, M
Chong, S
Hsu, C.K
Walters, A
Wyciskalla, T
Klubeck, B
Warner, A
Shapiro, C.A
Brandle, J.R
Wright, R.J
Lyon, D.J
Knezevic, S.Z
Francis, C.A
Sarno, E.A
Bhandari, A.B
German, D.R
Todey, D.P
Gelderman, R
Mallarino, A.P
Clover, M.W
Oltmans, R.R
Ballard, T
Cook, R.L
Enderson, J.T
Mallarino, A.P
Haq, M.U
Rathmann, N
Cook, R.L
Preza-Fontes, G
Nafziger, E
Christianson, L
Pittelkow, C
Sadeghpour, A
Weidhuner, A.M
Burkett, G
Zandvakili, O
Adeyemi, O
Kula, C
Berberich, J
Pike, J
Margenot, A.J
Danzl, D
Below, D
Sible, D
Steinke, K
Hayden, Z
Suplito, M
Liu, X
Xu, S
Margenot, A
Sadeghpour, A
Zandvakili, O
Guzel, M
Burkett, G
Vaughn, K
Adeyemi, O
Zandvakili, O
Battaglia, M
Babaei, S
Nair, J
Still, S
Sadeghpour, A
Steinke, K
Suplito, M
Hayden, Z
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State Report
State Report
Graduate Award Student Poster/State Report
State Report
General Posters
Graduate Student Award Poster AND State Report
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1. Identification of Reasons for High Temporal Soil-Test Potassium Variation

Extensive research has focused on potassium (K) fertlization and soil K testing during several decades in the Corn Belt. IN Iowa, more t han 200 conventional or on-farm strip trials were conducted since the iddle 1990s until the early 2000s. Results of this research were used to update Iowa State University (ISU) K recommendations in 1999 and in 2002. In spite of increasd knowledge about soil-test K calibration, K fertilizer placement meethods, and needed K fertilizer rates, this research demonstrated...

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