Full TGIF Record # 248001
Item 1 of 1
Publication Type:
i
Report
Author(s):Freeborg, R. P.; Daniel, W. H.
Author Affiliation:Department of Agronomy, Purdue University, Lafayette, IN
Title:Arsenic rates for Poa annua restriction determined by soil analysis
Section:Weed control in horticultural crops and turf
Other records with the "Weed control in horticultural crops and turf" Section
Meeting Info.:Kansas City, Missouri: December 7-9, 1971
Source:Proceedings: North Central Weed Control Conference. Vol. 26, 1971, p. 90.
# of Pages:1
Publishing Information:[Urbana, Illinois: Department of Agronomy, University of Illinois]
Abstract/Contents:"The purpose of this study was to develop a rapid soil test for available arsenic that would provide guidelines for determination of rates of Chip-Cal (48% tricalcium arsenate) (CA) needed for Poa annua control. Available arsenic was extracted from soil with Bray P-1 extractant (0.03N NH4F; 0.025N HCl) by a procedure routinely used for available phosphorus extraction. Atomic absorption (sensitivity at 1 ppm, 1% absorption, and detection limits of 0.25 ppm) was used to measure arsenic. Soil samples which were collected from golf courses located in Michigan, Illinois, Indiana, and Kentucky with a history of calcium arsenate (CA) use for Poa annua control had most extractable arsenic concentrated in the surface one inch of soil. Poa annua grown in the greenhouse in soils treated with CA grew normally when arsenic was placed below the surface inch. Golf course soil tests showed that arsenic did not leach readily, and was concentrated in the surface inch of soil. These data were the basis for requiring that soil samples collected for arsenic analysis represent the surface inch. The effect of clay, silt, sand, and organic matter on the amount of arsenic held against extraction was investigated in the green house. Four soils representative of a silt loam, silty clay loam, a muck, and a mixture of sand, silt loam, and peat (to represent a golf putting green soil mixture) were treated with CA at rates of 5.8, 8.6 and 11.5 lb/1,000 sq. ft. Poa annua was grown in these soils for 200 days. The surface one inch of soil was then analyzed for arsenic. Additional soil samples were then collected from the surface inch of soil from 33 golf courses in the Midwest. An estimate of the percentage Poa annua present was made at the time of sampling. Soils were analyzed for μg of arsenic and phosphorus, and % sand and silt. The resultant data were used in a second order multiple regression analysis to generate a table that would permit the prediction of available arsenic concentrations required to obtain a desired percentage control. This research led to the proposal of the following procedure for a soil analysis to determine the CA rates for Poa annua restriction: 1. Soil samples should be taken from the surface one inch, air dried, ground, and passed through a 20 mesh screen. 2. Samples should then be analyzed for available arsenic and phosphorus present expressed as μg/1.5 g. 3. Sample is analyzed for % sand and silt (and clay). 4. An estimate is made on site as to the percentage Poa annua control desired in the management program. 5. These data, via computed table, permit estimation of μg arsenic needed to obtain percentage Poa annua control desired. 6. Then an estimate of CA rates, to obtain needed μg of arsenic in the soil sampled, can be calculated based on data from the four soils, Table 1."
Language:English
References:0
See Also:See also related dissertation, Arsenic Concentrations Required for Poa annua Control as Determined By Soil Tests, 1971, R=22809. R=22809
Note:This item is an abstract and tables only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Freeborg, R. P., and W. H. Daniel. 1971. Arsenic rates for Poa annua restriction determined by soil analysis. Res. Rep. North Cent. Weed Control Conf. 26:p. 90.
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