Larrimore Gypsum for Crop Production on Southeaste

Information about Larrimore Gypsum for Crop Production on Southeaste

Published on January 28, 2008

Author: Pasquale

Source: authorstream.com

Content

Use of Gypsum for Crop Production on Southeastern Soils:  Use of Gypsum for Crop Production on Southeastern Soils Malcolm E. Sumner Consultant Lamar Larrimore Principal Research Engineer Southern Company Services, Inc September 12, 2006 Proven Effects of Gypsum on Soils:  Proven Effects of Gypsum on Soils Available Calcium for Peanuts:  Ca for pod development must enter pod directly Available Calcium for Peanuts Increases: Available calcium (soluble) Peanut pod calcium Reduction of Subsoil Acidity:  Crop Reduction of Subsoil Acidity Increases subsoil calcium Reduces subsoil aluminum (toxic) Allows roots to penetrate subsoils Increases potentially available water Effect of Gypsum Addition on Root Growth at East Lake Golf Club:  Control Gypsum Treatment Effect of Gypsum Addition on Root Growth at East Lake Golf Club Gypsum treatment = 4 tons/acre, April 11, 2005 Samples collected May 19, 2006 Southeastern Soils:  Southeastern Soils Naturally acidic Low basic cation (Ca, Mg, K) status Very acid subsoils often with toxic levels of Al3+ Sandy to clay loams in texture Slide7:  Southern Company Gypsum Agricultural Demonstration Sites Gypsum Stack at Plant Yates:  Gypsum Stack at Plant Yates Gypsum Stockpile at Yates:  Gypsum Stockpile at Yates Gypsum Loading:  Gypsum Loading Gypsum Spreading at East Lake GC:  Gypsum Spreading at East Lake GC Crops Investigated:  Crops Investigated Peanuts Alfalfa Cotton Pastures and Turf Tomatoes Cantaloupes Sweet corn Slide13:  Peanuts Effect of Gypsum on Soil Tests, Peanut Yield, Quality & Value - Florida:  Effect of Gypsum on Soil Tests, Peanut Yield, Quality & Value - Florida Effect of Gypsum on Soil Tests, Peanut Yield, Quality & Value - Mississippi:  Effect of Gypsum on Soil Tests, Peanut Yield, Quality & Value - Mississippi Effect of Gypsum on Soil Tests, Peanut Yield, Quality & Value - Georgia:  Effect of Gypsum on Soil Tests, Peanut Yield, Quality & Value - Georgia Effect of Gypsum on Peanut Yield, Quality & Value - Alabama:  Effect of Gypsum on Peanut Yield, Quality & Value - Alabama Overall Response of Peanuts to Gypsum:  Overall Response of Peanuts to Gypsum Results:  Results Gypsum Increases soil calcium Increases peanut yield Increases peanut quality Increases profits Slide20:  Alfalfa Effect of Gypsum on Exchangeable Al and Ca in the Soil Profile:  Effect of Gypsum on Exchangeable Al and Ca in the Soil Profile Effect of Gypsum on Exchangeable Al:  Control Gypsum Treatment Effect of Gypsum on Exchangeable Al Effect of Gypsum on Exchangeable Ca:  Effect of Gypsum on Exchangeable Ca Control Gypsum Treatment Effect of Gypsum on Alfalfa Yield & Composition - Georgia:  Effect of Gypsum on Alfalfa Yield & Composition - Georgia * significant at P = 0.05 Effect of Gypsum on Soil Moisture - Georgia:  Effect of Gypsum on Soil Moisture - Georgia Control Gypsum Treatment Gypsum extracted more water at depth Alfalfa Feed Quality - Georgia:  Alfalfa Feed Quality - Georgia Results:  Results Gypsum Increases calcium in soil profile Reduces toxic aluminum in soil profile Improves water extraction from lower profile Increases alfalfa yield Increases alfalfa quality Higher protein & digestible nutrients Less fiber and lignin Slide28:  Cotton Effect of Gypsum on Cotton Root Development - Mississippi:  Contorted tap roots due to Al toxicity Straight tap roots in absence of Al Effect of Gypsum on Cotton Root Development - Mississippi Effect of Gypsum on Cotton Yield & Quality - Mississippi:  Effect of Gypsum on Cotton Yield & Quality - Mississippi Effect of Gypsum on Cotton Yield & Value - Georgia:  Effect of Gypsum on Cotton Yield & Value - Georgia Lint Cotton Yield (kg/ha) Results:  Results Gypsum Reduces subsoil Al and increases subsoil Ca Improves root penetration into subsoil Increases cotton yield Increases cotton quality Slide33:  Pastures Effect of Gypsum on Bermuda Hay Yield & Ca Content - Georgia:  Effect of Gypsum on Bermuda Hay Yield & Ca Content - Georgia Treatment Control 4.4 T/acre Hay Yield lb/acre May 2005 1136a 1549b Sept 2005 402a 737b Sept 2005 0.6a 0.75b Ca Content % Gypsum Effect of Gypsum on Bermuda Root Growth - Georgia:  Effect of Gypsum on Bermuda Root Growth - Georgia Control Gypsum Treatment Bermuda Root Comparisons:  Bermuda Root Comparisons Slide37:  Tomatoes Effect of Gypsum on Soil Tests, Tomato Yield & Value - Mississippi:  Effect of Gypsum on Soil Tests, Tomato Yield & Value - Mississippi Effect of Gypsum on Shelf Life of Tomatoes (Stored at Room Temperature for 2 Weeks - Mississippi):  Effect of Gypsum on Shelf Life of Tomatoes (Stored at Room Temperature for 2 Weeks - Mississippi) Effect of Gypsum on Tomato Yield & Ca Content - Alabama:  Effect of Gypsum on Tomato Yield & Ca Content - Alabama Effect of Gypsum on Shelf Life of Tomatoes:  Control Gypsum Effect of Gypsum on Shelf Life of Tomatoes Blemishes on fruit after 4 weeks storage @ 40°F Unblemished fruit after 4 weeks storage @ 40°F Results:  Results Gypsum Increases tomato yield Increases skin Ca content Increases shelf life Cantaloupes:  Cantaloupes Effect of Gypsum on Soil Tests, Cantaloupe Yield & Ca Content - Georgia:  Effect of Gypsum on Soil Tests, Cantaloupe Yield & Ca Content - Georgia Slide46:  Cantaloupes stored at 40°F for 4 weeks No Gypsum 1100 lb Gypsum/ac Results:  Results Gypsum Increases cantaloupe vine growth Increases fruit yield Increases skin Ca content Increases shelf life Slide48:  Sweetcorn Slide49:  No gypsum Gypsum Results:  Results Visual improvement due to gypsum Drought killed crop before harvest

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