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The importance of Gypsum

Norton, L. D., Aeuna, S. 2008

”Improving Water Quality Using Soil Amendments in Conservation Tillage”
Agro-Environmental Symposium, USDA Agricultural Research Service

Norton, L.D. 2007

”Reducing runoff volume and concentrations of Phosphorus and Atrazine with Gypsum Amendment”
National Soil Erosion Laboratory, USDA-ARS, Purdue University

Norton, L.D., Mamedov, A, I 2006

”Reducing runoff Phosphorus loss using byproduct gypsum and waste paper”
International Symposium Sept. 2006, Ghent, Belgium

Yaduvanshi, N.R S., Sharma, D.R, 2007

”Tillage and residual organic manures. Soil and Tillage Research
Vol. 98 Issue 1 Jan. 2008-12-21

Favaretto, N., et al 2006

”Gypsum Amendment and Exchangeable Calcium and Magnesium Affecting Phosphorus and Nitrogen in Runoff”
Soil Science Soc. America Journal 70: 1788-1796 (2006)

Varcoe, J. 2006

”A Study on the transport of Natural Organic Matter (NOM) and Phosphorus in gypsum treated soils of the Mt Bold catchment and impacts on water quality”
PhD Thesis University of Adelaide, Abstract Jan 2006
Maryland College Cooperative 2007
”Phosphorus removal from Animal Waste with SWAN Gypsum”

Andrade, A.T., Fernandas, L.A., Farquin, V. 2002

”Organic Residue, Limestone, Gypsum and Phosphorus Adsorption by Lowland Soils”
Sci. Agric. (Piracicaba, Brazil), Vol. 59 No. 2

Bastin, O., Janssens, R, Dufey, L, Peelers, A. 1999

”Phosphorus removal by synthetic iron-oxide gypsum compound”
Ecological Engineering, Vol. 12 Issue 3-4

Makuch, J. R., 1995 – ‘97

”Poultry Manure Management”
157 Citations from Agricola Data Base. Water Quality Information Centre, Agricultural Research Service USDA

Jinwon, S., Boyd, C. E, 2001

”Calcium Sulphate (Gypsum) Treatment for Water Quality Improvement”
Journal of World Aquaculture Society, Vol. 32, No. 3. (2001)

Zeolites and Cation Exchange Capacitors

Lingshuang, Cai. Jacek, A. etal 2007

”Evaluation of Zeolite for control of Odorants emissions from simulated Poultry Manure Storage”
J.Environ. Quality 2007, Vol. 36184-193

Carroll-Hale, E 2004

”Reduction of Ammonia Emission and Phosphorus excretion in laying hen manure through feed manipulation” mgt/naticenter/sanantomo/Hale.pdf

Hong Li, Hongwei Xin, Burns, R. T. 2006

”Reduction of Ammonia Emission from Stored Poultry Manure using Additives: Zeolite, Al+ clear, Feric-3 and PLT”
American Soc. Agricultural and Biological Engineers, Paper No. 064188

Stout, W., Grtuzek, M, Golden, D. 2002

Sequestering Manure N with Synthetic Zeolites”
Agronomy Abstracts, Paper No. 2335

Bregendahl, K., Roberts, S., 2005

”Nutritional Strategies to Reduce Ammonia emissions from Laying Hens”
Dept. Animal Science Iowa State University, International Symposium Publication

Carey, J. B. 2005

”Mitigation Strategies for Ammonia Management”

Wu Haan,W. etal 2007

”Effect of an Acidifying Diet combined with Zeolite and slight protein reduction on air emissions from laying hens of different ages”
Poultry Science 2007, Vol. 86: 182 -190

Zeotech Corporation 2005

”A Bibliography: Animal Trials and Data Using Natural Zeolites”

Dwairi, LM. 1998

”Conserving Toxic Ammoniacal Nitrogen in Manure Using Natural Zeotitic Tuff: A Comparative Study”
Bull. Environ. Contam. Toxicol. 1998. Vol. 60: 126 – 133


“... Application of gypsum to conservation tillage can significantly reduce the off site pollution due to nitrogen and phosphorus especially where poultry manure is applied.”

Norton and Acuna 2008


"...Research is being conducted to investigate the affinity for phosphorus from agricultural waste under field conditions using gypsum and iron oxide fitter cake as soil and manure amendment."

Maryland (US) State Agricultural Research Paper


"... There are three general uses of gypsum in agricultural applications:
• A source of nutrient for plants
• Improvement of soil physical and chemical properties
• Reduction in the transport ofnutrients9 sediment, pesticides
and other contaminants to surface waters."

United States EPA Bulletin 530-F-08-009 (2009)


"... Results from this study show that gypsum can enhance the soil's ability to retain some of the primary agents of water quality decline, phosphorus and natural organic matter. Potential benefits of using gypsum for this purpose were observed both on-site through improved nutrient retention and fertility in soils and off-site in water runoff (surface and subsurface) through improved water quality."

Varcoe 2006


"... The soluble forms of nutrients that cause hypoxia have been reduced by gypsum treatment."

Norton 2007


"...Reduction of ammonia emission as a result of topical application of the tested manure treatment when compared to the control, over a 7-day manure storage period was as following: 68%, 81%, and 96% respectively for zeolite applied at 2.5%, 5%, or 10% of the manure weight."

Hong Li et al 2006


"...The introduction of zeolite in feed is the most effective means of odour control in poultry operations. Many farms have eliminated most of their odour and realised greater animal health welfare and production by feeding zeolite between ½ to 2% of the total ration by weight.”

ZMC Corp. 2008


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