PDF Notes: UNIVERSITY OF IBADAN

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    What forces act on a tillage tool?

    Includes draft, vertical, lateral, and soil reactions.

    What factors affect draft force?

    Depends on depth, width, speed, soil type, and tool shape.

    How does a mouldboard plough differ from a disc plough?

    Mouldboard inverts soil; disc cuts and mixes for tough conditions.

    What is the principle of a rotary tiller?

    Blades rotate to cut, throw, and pulverize soil.

    What are the objectives of tillage?

    Aims for soil loosening, weed control, and seedbed preparation.

    How can mechanization be improved in Nigeria?

    Involves subsidies, local fabrication, and training programs.

    What is the role of adhesion in tillage?

    Affects how tools interact with soil during operation.

    What is salvage value?

    The residual value of machinery at the end of its life.

    What is service life in machinery management?

    The economically useful period of a machine.

    Why do smaller rolls sink deeper in soil?

    Higher contact pressure due to weight distribution over a smaller area.