What Are the Costs Associated with a "Zero Tillage" Cropping

What are the costs associated with a "zero tillage" cropping system?

A) Farmers use tiles to precisely measure the area between each crop so the cost is labor hours
B) Farmers leave crop residue at the end of harvest and plant the next crop without removing it,costing the famer extra labor and irrigation
C) Farmers leave crop residue at the end of harvest and plant the next crop without removing it,costing the famer extra difficulty with pest control
D) Farmers remove crop residue and use it as fertilizer instead of traditional fertilizers,costing the farmer in reduced crop yield