Scarification is performed by contour plowing, furrow grading, contour discing, or any other means of abrading the surface parallel to ... Mulching (hay) approximate average cost is $100 per hectare ($ 40 per acre). Contour plowing should range from $0.80 to $1 .60 per meter ($0.75 to $1 .50 per yard), depending on terrain.
|Title||:||Processes, procedures and methods to control pollution from mining activities|
|Author||:||Skelly and Loy, Penn Environmental Consultants, United States. Environmental Protection Agency|