@article {46781,
	title = {A comparison of sampling methods for soil-test phosphorus},
	year = {2006},
	pages = {41},
	institution = {Alberta Soil Phosphorus Limits Project},
	url = {http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/sag11864/$FILE/vol-3-sampling-methods.pdf},
	author = {Nolan, Sheilah C. and Olson, Barry M. and Hecker, Frank J.}
}
