Why were fewer farm workers needed doing the early 1900s?

Fewer farm workers were needed in the early 1900s primarily due to the advent of new agricultural technologies and machinery, such as tractors and mechanical harvesters, which significantly increased efficiency and productivity. Additionally, the rise of industrialization drew many workers away from agriculture to jobs in factories and urban areas, further reducing the demand for labor on farms. These changes marked a shift in agricultural practices that allowed for larger-scale farming with fewer hands.