Combination of UAN and CaTs® Improves Yield
and Nitrogen Use Efficiency in Cotton and Corn
C
a
T
s®
Research on cotton and corn has shown that application of CaTs (calcium
thiosulfate) with UAN solution can improve yields and nitrogen use efficiency (NUE).
Cotton
Treatment
1.) UAN solution
2.) UAN solution + Thio-Sul
3.) UAN solution + CaTs
4.) UAN solution + CaTs
lbs
N/ac
180
180
180
180
lbs
Sulfur/ac
Lint Yield
lbs
960
993
1174
1173
10
5
10
Location: Dos Palos, CA. Crop Variety: Acala Riata was planted on April 16, 2005. Treatments were sidedressed on
June 6th and replicated 4 times. CaTs was applied at 5 and 10 gallons per acre.
Corn
Treatment
1.) UAN solution
2.) UAN Solution + Thio-Sul
3.) UAN Solution
4.) UAN Solution+ CaTs
Tessenderlo Kerley
2255 N. 44th Street
Suite. 300
Phoenix, AZ 85008
800.525.2803
www.tkinet.com
lbs
N/ac
100
100
150
100
lbs
Sulfur/ac
3.3
3.3
Yield
Bu/ac
178.0
184.8
195.8
190.5
NUE
.56
.54
.76
.52
Location: Cedar Falls, Iowa. No-Till conditions, treatments were surface banded, 20 inches apart at the 4th leaf stage.
Yields were not significantly different for treatments 3 and 4. CaTs was applied at 3.3 gallons per acre.
CaTs improved cotton yields above the sulfur-only treatment, indicating a
benefit to soluble calcium even on a slightly calcareous soil. On corn, CaTs
significantly improved yield over the nitrogen-only treatment and was not
significantly different from the full rate (150 lbs) of nitrogen. This was almost a
32% increase in NUE over the full rate of nitrogen. CaTs will blend with UAN
solution in any ratio and can be surface applied or knifed into the soil.