Concept:Mechanized farm practices are those carried out with machines. Non-mechanized practices rely on human effort or simple hand tools.
Explanation:Bush clearing can be done with bulldozers or tractors fitted with clearing blades.
Planting can be done using mechanical planters and seed drills.
Fertilizer application can be carried out using tractor-mounted spreaders or applicators.
Transplanting is usually done by hand, especially for delicate seedlings such as rice and vegetables.
It requires care and precision that simple machines cannot easily provide, so it is not typically mechanized.
Thus, among the given options, transplanting is the farm practice that is not mechanized.
Answer:D. transplanting.