Dry farming in western Canada Dry farming in western Canada . dryfarminginwes00brac Year: 1921 THE PRINCIPLES OF TILLAGE 113 Soil Looseners. Among the soil looseners—and these include inter- tilling machines—are those having discs, cutting blades or stirring points. Those having revolving discs are known as disc harrows, while most of those having stir- ring points are called drag harrows. Those having cutting blades may have spring teeth, 'duck' feet, or long slanting knives and are generally spoken 6f as Fig. 39.—Types of Cultivators, (a) Wide-bladed or duck-foot cultivator; (b) Spring-t
Dry farming in western Canada Dry farming in western Canada . dryfarminginwes00brac Year: 1921 THE PRINCIPLES OF TILLAGE 113 Soil Looseners. Among the soil looseners—and these include inter- tilling machines—are those having discs, cutting blades or stirring points. Those having revolving discs are known as disc harrows, while most of those having stir- ring points are called drag harrows. Those having cutting blades may have spring teeth, 'duck' feet, or long slanting knives and are generally spoken 6f as Fig. 39.—Types of Cultivators, (a) Wide-bladed or duck-foot cultivator; (b) Spring-tooth cultivator; (c) Narrow-bladed two-row intertillage cultivator; (d) Alfalfa renovator at work. cultivators. But all are soil looseners and their chief functions are to control weed growth and to loosen llie surface soil in order to kill weeds or make a soil mulch or admit air. 85. Cultivators.—The cultivators have cutting points of various widths and designs. The wide bladed or '•duck footed' types ( Pig. 39A) arc chiefly used to cut
Size: 1731px × 1155px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
