Soil Erosion And Soil Conservation
Muhtasari
Topsoil is a farmer's working capital. It holds the nutrients, the water and the living organisms that crops depend on, yet a single heavy storm on a bare hillside can strip away a layer that took centuries to form. Once the topsoil has gone, yields fall, the land is harder to work and gullies can cut a field in two. Soil erosion is therefore one of the most serious threats to food production, and it is almost always made worse by the way land is farmed.
In this lesson you will learn how moving water and wind detach and carry soil away, why slopes and bare ground are so vulnerable, and how farmers fight back. You will study practical conservation measures, from terracing and contour ploughing to cover crops, mulching and windbreaks, and learn to explain not just what each one does but exactly how it protects the soil and the harvest.
Malengo
- (a) describe types of soil erosion, their causes, agents, prevention and control.
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Hongera kwa kukamilisha somo la Soil Erosion And Soil Conservation. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Which is the most severe form of water erosion? A. Splash erosion B. Sheet erosion C. Rill erosion D. Gully erosion Answer: D
- Soil erosion is best defined as: A. The build-up of nutrients in the topsoil B. The detachment and removal of topsoil by water or wind C. The breakdown of rock into soil D. The leaching of salts deep into the soil Answer: B
- Ploughing across a slope, along the contour, rather than up and down it is called: A. Strip cropping B. Terracing C. Contour ploughing D. Mulching Answer: C
- Which measure mainly reduces wind erosion of a bare, sandy field? A. Planting windbreaks B. Adding lime C. Deep ploughing up and down the slope D. Removing all plant cover Answer: A
- Which practice both protects the soil surface and adds organic matter as it rots? A. Overgrazing B. Mulching C. Leaving the field bare D. Burning the stubble Answer: B
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