Is Gypsum Application Beneficial to Soil?soils.wisc.edu/extension/area/2012/Arriaga_Gypsum.pdfIs...
Transcript of Is Gypsum Application Beneficial to Soil?soils.wisc.edu/extension/area/2012/Arriaga_Gypsum.pdfIs...
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Is Gypsum Application Beneficial to Soil?
Francisco J. Arriaga
Extension Soil Scientist
Soil and Water Conservation/Management
UW-Extension and Dept. of Soil Science
SOIL, WATER & NUTRIENT MANAGEMENT MEETINGS
November 27 - December 6, 2012
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What is Gypsum?
• Soft mineral - calcium sulfate
• Other names: plaster or plaster of Paris
• Reason for the “Plaster War of 1820”
– Plaster smuggling from Nova Scotia to newly formed
United States (1783)
– Gypsum trade: 93 tons in 1791 – 43,560 tons in 1818
Canadian Institute of Mining, Metallurgy and Petroleum
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Gypsum Chemistry
• Calcium sulfate dihydrate – CaSO4 · 2H2O
• CaSO4 · 2H2O + heat(300ºF) CaSO4 · ½H2O + 1½H2O
– Gypsum plaster or plaster of Paris
• CaSO4 · ½ H2O + heat(392ºF) CaSO4 + ½H2O
– Anhydrite (mineral)
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Sources of Gypsum
• Mined gypsum
• Flue-gas desulfurization (FGD) gypsum
• Recycled gypsum (wallboard & casting)
• Phosphogypsum
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Early Uses in Agriculture
• Recorded use as a fertilizer since 2nd half
of 1700’s.
• Identified as helping plant growth when
alabaster workers dusted off clothes in
grass patch in France. Similar discovery
made in Germany about the same time.
• Used by Benjamin Franklin.
(Crocker, 1922)
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Early Uses in Agriculture
• Greenhouse work published by Hart and
Tottingham in 1915 (Journal of Agricultural
Research) with a Miami silt loam from the
University Hill Farm in Madison.
• They concluded that “…for certain plant
and types of soil they (sulfates) will be
beneficial if their only action is as a source
of sulphur.”
(Hart & Tottingham, 1915)
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Early Uses in Agriculture
Clover
Radish
Radish
(Hart & Tottingham, 1915)
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Early Uses in Agriculture
Red
Clover
(Hart & Tottingham, 1915)
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Early Uses in Agriculture
“In general, the calcium sulphate was more effective
than the more soluble sodium sulfate. The special
influence of sulphates on root development is pointed
out. They were particularly effective with red clover
and rape. In the case of red clover, which was more
especially studied, the roots were much elongated
where shulphates entered into the ration. This must
result in a more extended feeding area for the plant
and, in addition, increase its ability to withstand
periods of drought.”
(Hart & Tottingham, 1915)
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Agronomic Uses of Gypsum
• Source of calcium (Ca)
• Source of sulfur (S)
• Sodic soil remediation
• Acid subsoils
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Calcium in Wisconsin Soils
• Not likely to be deficient if liming recommendations
followed (pH < 5.0 for calcium deficiency to show for
most crops in WI).
• Response to calcium application unlikely even in
soils testing low or very low, except when growing
potatoes.
• Calcium recommendations for potato production:
– Soils with: low – 100 lb/ac; very low – 200 lb/ac (no lime req.)
– If lime is required, 50-100 lb/ac recommended in addition to
lime in very low soils
(A2809-Laboski & Peters, 2012)
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Liming Value
Material Neutralizing agent CaCO3 equivalent
(pure material)
---- % ----
Dolomitic limestone CaCO3·MgCO3 110-118
Calcitic limestone CaCO3 100
Wood ash K2CO3, CaCO3, MgCO3 20-90
Gypsum none 0
(A3588-Management of Wisconsin Soils)
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Sulfur in Wisconsin Soils
• Some sulfur deficiencies have been reported
recently in WI.
• Most likely to occur in crops with a high S
demand (alfalfa, canola and brassicas), in sandy
soils and soils low in organic matter.
• Soils with low or medium potential for sulfate
retention (sands and loamy sands), and with no
recent manure applications, would benefit from
sulfur application if growing plants with medium
or high sulfur needs. (A2809-Laboski & Peters, 2012)
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Su
lfu
r D
epo
sitio
n T
rend
s
US EPA-Clean Air Status and Trends Network
1989-1991
1999-2001
2009-2011
0 – 8 lb/ac
7 – 18 lb/ac
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Sodic Soil Remediation
• Soils with a very high concentration of
sodium.
• Occurs in arid and semi-arid climates.
• Poor structure (low infiltration, water
holding capacity, crusting, etc.) and
chemical properties.
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Sodic Soil Remediation
Dept. of Agriculture and Food, Government of Western Australia
(http://grains.agric.wa.gov.au/node/poor-seedbed-soil-structure)
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Acid Subsoils & Al3+ Toxicity
10
20
30
40
50
60
70
Dep
th (
cm
)
0 1 2 3
Root density (m/L)
lime
lime + gypsum
(Adapted from Farina and Channon, 1988)
CaSO4 + Al3+ Al(SO4)+ + Ca2+
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Infiltration Rate
(Yu et al., 2003)
control
gypsum
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Arlington Study 2010-12
Arlington Gypsum Tillage
AGT-10
104 102 111 107 115 114 124 122 221 220 213 217 204 206 209 211 309 307 305 304 320 324 315 316
101 105 110 112 116 118 120 121 219 223 218 216 205 203 210 207 308 312 303 302 322 319 317 318
103 106 108 109 117 113 123 119 222 224 215 214 201 202 212 208 310 311 301 306 323 321 314 313
No –till Chisel
Trt. No. N Rate Gypsum Trt. No. N Rate Gypsum Trt. No. N Rate Gypsum Trt. No. N Rate Gypsum
1 0 0 7 0 1 T 13 0 0 19 0 1 T
2 30 0 8 30 1 T 14 30 0 20 30 1 T
3 60 0 9 60 1 T 15 60 0 21 60 1 T
4 90 0 10 90 1 T 16 90 0 22 90 1 T
5 120 0 11 120 1 T 17 120 0 23 120 1 T
6 150 0 12 150 1 T 18 150 0 24 150 1 T
N
35’ to AFC-10
12’ ● ● 12’
Study investigating the interaction
of gypsum application with tillage
and N rate to corn.
Treatments:
• Tillage: no-till & chisel/disking
• N rate: 0, 30, 60, 90, 120 & 150 lb N/ac
• Gypsum: none & 1 ton/ac
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Gypsum, Tillage & N rate
Source 2010 2011 2012
Tillage (T) 0.095 0.331 0.036
Gypsum (G) 0.340 0.855 0.975
N rate (N) <0.01 <0.01 <0.01
G x T 0.652 0.916 0.028
N x T 0.622 0.587 0.633
N x G 0.098 0.120 0.400
N x G x T 0.645 0.069 0.535
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Tillage Effect
a b
ns
a
b
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Gypsum Application
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2010
2011
2012
Gypsum
& N
rate
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Gypsum & Tillage
ns
ns a
b
c d
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Nutrient Losses
• Work conducted in the early 1990’s
described reductions in P losses from soil,
mainly dissolved P.
• More recent work has also reported
reductions in NH4-N and total N from
runoff losses with gypsum application.
(Coale et al., 1994; Stout et al., 1999; Stout et al., 2003; Brauer et al., 2005; Cox et al., 2005;
Favaretto et al., 2006; Tubail et al., 2008; Murphy & Stevens, 2010)
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Closing Remarks
• There is a long history of gypsum use in
agriculture.
• Crops with high sulfur or calcium requirements
will benefit the most from gypsum application,
especially in sandy soils and soils with low
organic matter in Wisconsin.
• Gypsum can potentially reduce nutrient losses,
mainly dissolved phosphorus and shows
promise for other nutrient forms.