Land preparation：练习题

Which hand-operated tool is most suitable for the initial primary cultivation (digging) of a small garden plot with heavy soil?

Which of the following tools is most suitable for primary cultivation when preparing a small vegetable plot by hand?

When preparing land for a crop of Daucus carota (carrots), why is the achievement of a fine tilth during secondary cultivation more critical than for a crop of Zea mays (maize)?

Which of the following is considered a secondary cultivation task?

A farmer is preparing a piece of land that was previously covered in heavy bush. Which sequence of operations represents the correct order of land preparation?

Explain why secondary cultivation is typically performed closer to the time of sowing than primary cultivation.

Analyze the consequences of performing primary cultivation on heavy clay soils when the moisture content is too high, specifically regarding soil structure and drainage.

Distinguish between primary and secondary cultivation by stating the specific purpose of each in preparing a seedbed.

(a) Explain why the processes of clearing and stumping are necessary prerequisites for the use of mechanised primary cultivation implements.

(b) Distinguish between primary and secondary cultivation. In your answer, name one implement for each and describe how the soil structure is modified during each stage.

(c) Discuss how soil type and topography affect the choice of tools used during the land preparation phase.