Question

define the term curvature of the field​

Answer 1

Answer:

a defect in an optical system that results in points on an object plane perpendicular to the axis being imaged on a curved surface rather than on a plane.

Answer 2

Answer:

Field cultivator are widely used in relatively light residue low herbicide system to control successive flushes of weeds prior to planting . Wide , low-profile sweeps optimise weed control and minimise soil mixing