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This book examines and evaluates the performance of four standard
chisel plough tines: heavy duty, double heart, double heart with
wings and duck foot, which were connected with a rigid shank.
Experiments were conducted in a soil bin filled with sandy loamy
soil, and the experimental factors included varying operation
conditions (speed and depth) and their dependency upon a draft
force and their components (horizontal and vertical force),
specific force (force per unit area), specific power (power per
unit area), soil loosening percentage (above and below the original
soil surface) and soil profile parameters (e.g. furrow height,
furrow width, ridge height, area of ridge and furrow etc.). The
evaluation involved developing regression equations based on
Glancey and Upadhyaya's model by adding new terms related to the
tine geometric parameters or by adding a dummy term variable. These
two techniques made up the general study parameters and had the
same trend effect on operation conditions to compare between tines.
Lab results such as force components and the width of furrow were
verified in a field test. Furthermore, a model to predict the draft
force by using principles of soil mechanics and soil profile
evaluation was designed.
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