TillagePatterns(详见附件)Anoptimaltillagepatternreducesthetimespentinnon-productivework.One
ofthemostimportantobjectivesofatillagepatternistominimizethenumber
ofturnsandmaximizethelengthofthetillageruns.Thereareseveralpatterns
thatcanbeusedwhentillingafield.Thesearecircuitous,upandbackor
headlandandworkinginlands.