@article {38662,
	title = {An economic comparison of the costs of direct seeding and a conventional seeding system under systems evaluation. In : 30th Annual Alberta Soil Science Workshop Proceedings, "Research, education and extension", February 22-24, 1993, Edmonton, Alberta},
	year = {1993},
	pages = {118-124},
	institution = {Alberta Soil Science Workshop},
	author = {Appleby, T.}
}
