Editing Tillage (section)

==General comments==
* The type of implement makes the most difference, although other factors can have an effect.<ref name="miss-extension">[http://extension.missouri.edu/explore/agguides/agengin/g01650.htm Conservation Tillage and Residue Management to Reduce Soil Erosion] University of Missouri: Extension</ref>
* Tilling in absolute darkness (night tillage) might reduce the number of weeds that sprout following the tilling operation by half. Light is necessary to break the dormancy of some weed species' seed, so if fewer seeds are exposed to light during the tilling process, fewer will sprout. This may help reduce the amount of herbicides needed for weed control.<ref>{{cite web |url=http://www.ars.usda.gov/is/AR/archive/dec95/tilling1295.htm |title=Nightmare in Tilling Fields – a Horror for Weed Pests |publisher=Ars.usda.gov |access-date=2012-07-05}}</ref>
* Greater speeds, when using certain tillage implements (disks and chisel plows), lead to more intensive tillage (i.e., less residue is on the soil surface).
* Increasing the angle of disks causes residues to be buried more deeply. Increasing their concavity makes them more aggressive.
* Chisel plows can have spikes or sweeps. Spikes are more aggressive.
* Percentage residue is used to compare tillage systems because the amount of [[crop residue]] affects the soil loss due to erosion.<ref name="miss-extension"/><ref>{{cite web |url=http://www.ipm.iastate.edu/ipm/icm/2002/5-13-2002/cropresidue.html |title=Methods for measuring crop residue |author1=Mahdi Al-Kaisi |author2=Mark Hanna |author3=Michael Tidman |publisher=[[Iowa State University]] |date=13 May 2002 |access-date=2012-12-28}}</ref>