SSSA Division: Soil Mineralogy Session: Symposium--Soil Potassium Tests and Their Relationship to Plant Availability and Native Mineralogy: I (ASA, CSSA and SSSA International Annual Meetings)

167 Symposium--Soil Potassium Tests and Their Relationship to Plant Availability and Native Mineralogy: I

Oral Session

SSSA Division: Soil Mineralogy

Potassium is an essential nutrient for plants, animals, and humans. It has reemerged as a topic of scientific discussion. This is due in part to erratic crop yield responses to potassium fertilizer additions, reports of potassium deficiencies, the rising costs of potassium fertilizers, and the difficulties encountered in developing soil potassium test recommendations which adequately mimic plant availability. Moreover, the potassium supplying power of soils is impacted by the native minerals present and their complex interaction with plants, environmental conditions such as moisture content, and management. The purpose of this joint symposium is to bring together scientists to explore how soil potassium tests relate to plant availability and mineralogy over a range in soil types, environmental conditions, and management practices in order to identify gaps in our understanding of the soil potassium cycle.

Cosponsor(s):

Soil Fertility & Plant Nutrition
Nutrient Management & Soil & Plant Analysis

Monday, November 3, 2014: 12:55 PM-4:00 PM

Long Beach Convention Center, Room 203A

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Organizers:

Christopher J. Matocha and Peter C. Scharf

12:55 PM

Introductory Remarks

1:00 PM

167-1

An Historical Perspective on the Chemistry and Mineralogy of Soil Potassium.
Donald L Sparks, University of Delaware

Audio File Recorded Presentation

1:20 PM

167-2

Potassium Dynamics in Vertisols Following Potassium Fertilizer Application.
Balwant Singh, University of Sydney; Kathryn J Taylor, University of Sydney; Graeme Schwenke, NSW Department of Primary Industries

1:35 PM

167-3

Exchangeable K - Why Is It so Darn Complicated?.
Michael L. Thompson, Iowa State University; Taslima Stephen, Iowa State University

Audio File Recorded Presentation

1:55 PM

167-4

Soil Testing for Potassium in Relation to Sample Handling and Mineralogy.
Antonio P. Mallarino, Iowa State University; Ryan R. Oltmans, Iowa State University; Michael L. Thompson, Iowa State University

Audio File Recorded Presentation

2:15 PM

167-5

The Potassium Crusades: On the Cusp of the Age of Enlightenment.
Sylvie M. Brouder, Purdue University

Audio File Recorded Presentation

2:35 PM

167-6

Soil Mineralogy and K Fixation in California Soils.
Randal J. Southard, University of California-Davis; G. Stuart Pettygrove, University of California Davis; Gordon L. Rees, University of California-Davis

Audio File Recorded Presentation

2:55 PM

167-7

Is Soil-Test Potassium Meaningful for Crop Production and Soil Fertility Management in Arkansas?.
Nathan A. Slaton, University of Arkansas; Richard J. Norman, University of Arkansas; Trenton L. Roberts, University of Arkansas

Audio File Recorded Presentation

3:15 PM

167-8

Long-Term Residual Effects of Potassium to Cotton on Soil Potassium Supply and Corn Productivity Under No-Tillage.
Xinhua Yin, University of Tennessee - Knoxville; Guisu Zhou, University of Tennessee-Knoxville; David Verbree, University of Tennessee - Knoxville

Audio File Recorded Presentation

3:30 PM

167-9

Effects of Cocoa Pod Husk Ash and NPK Fertilizer on the Yield of Sweetpotato and Distribution of Potassium Forms in an Ultisol of Southeastern Nigeria.
Abiola Lucia Akinmutimi, Michael Okpara University of Agriculture, Umudike

Audio File Recorded Presentation

3:45 PM

167-10

Potassium Rate and Timing of Application to Optimize Bermudagrass Hay Yield and K Content.
Hubert J. Savoy Jr., University of Tennessee - Knoxville

Audio File Recorded Presentation

4:00 PM

Adjourn

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