Soil Erosion And Soil Conservation
Gbogbo ọrọ náà
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.
Ebumnobi
- (a) describe types of soil erosion, their causes, agents, prevention and control.
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Soil Erosion And Soil Conservation. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Soil Erosion And Soil Conservation? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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