Neco Model Questions Vol1 2022 Agricultural Science Question 3

A farmer wants to assess the efficiency of two hand hoes, Type X and Type Y, for weeding a 0.5 ha cassava field. He conducts a timed trial on a 0.1 ha strip for each hoe and records the following data: - Type X: time taken = 45 min, weeds removed = 180, weight of hoe after use = 2.8 kg. - Type Y: time taken = 30 min, weeds removed = 150, weight of hoe after use = 2.5 kg. The initial weight of each hoe before use is 2.0 kg. The farmer defines work efficiency as: \[ \text{Efficiency}=\frac{\text{Weeds removed per minute}}{\text{Increase in weight (kg)}} \] Using the trial data, the farmer wishes to: a) calculate the work efficiency for each hoe; b) decide which hoe to adopt based on the highest efficiency; c) identify one possible source of error in the trial and suggest a method to minimise it.