The effect of enamel-coating on the draught performance of an animal-drawn
mouldboard plough was studied. A single furrow swing mouldboard plough-Maun
Series, and the same type enamel-coated plough both ox-drawn, are compared under
similar working conditions such as soil moisture content, depth and width of cut and
approximately constant speed of ploughing. It was found that the enamel-coating
reduces both the plough draught and the specific draught. The percentage reduction of
the plough draught for enamel-coated plough compared to uncoated plough varied
from 12.7% at 25% soil moisture content to 18.1% at 32% soil moisture content (dry
basis). It was also found that the percentage reduction of the specific draught achieved
with the enamel-coated plough in comparison with the uncoated plough varied from
20.3% at 32% soil moisture content to 25.7% at 25% soil moisture content (dry basis).