Neco Model Questions Vol1 2022 Agricultural Science Question 4

A farmer intends to plough a rectangular field that measures 200 m in length and 250 m in width. The field will be ploughed in rows spaced 0.75 m apart. A 30‑horsepower (hp) diesel tractor is to be used. The tractor’s fuel consumption rate is 0.30 L per hp per hour when operating at full load. During ploughing the tractor works at 70 % of its rated power. The average speed of the tractor while ploughing is 5 km h⁻¹. Diesel costs ₦180 per litre. a) Calculate the total time (in hours) required to plough the whole field. b) Estimate the total volume of diesel fuel that will be consumed. c) Determine the monetary cost of the diesel for the operation. d) Briefly discuss two advantages of using a tractor for ploughing this field compared with animal‑drawn ploughing.