Drainage And Irrigation
Gbogbo ọrọ náà
Plant roots need water, but they also need air. A waterlogged soil drowns the roots by filling the spaces that should hold oxygen, while a soil that drains too fast may dry out before the crop can drink. Good farming is about getting this balance right, and the two tools for the job are drainage, which removes excess water, and irrigation, which adds water when the rain falls short.
In this lesson you will learn how gravitational water moves down through the soil, why waterlogging starves roots of oxygen and harms the organisms that keep soil healthy, and how ditches and drains rescue wet land. You will then study why and when crops need irrigation and compare the main methods, surface, sprinkler and drip, weighing each for its effect on water use, yield and crop quality.
Ebumnobi
- (a) describe drainage as movement of gravitational water down through the soil and understand the drainage of waterlogged land by means of ditches and the loss of plant nutrients due to leaching.
- (b) understand the effects of poor drainage on soil organisms and root respiration.
- (c) explain the need for irrigation and describe methods of irrigation with the effects on crop yield and quality (details of irrigation programmes for individual crops and of equipment specification are not required).
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Drainage And Irrigation. 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.
- Drainage of a soil is best described as the movement of: A. Nutrients up to the leaves B. Gravitational water down through the soil C. Air out of the leaves D. Salts up to the surface Answer: B
- The loss of dissolved plant nutrients as water drains down through the soil is called: A. Leaching B. Erosion C. Transpiration D. Evaporation Answer: A
- Why do roots in a waterlogged soil grow poorly? A. There is too much oxygen B. There is little oxygen for root respiration C. The soil is too acidic D. There are too many nutrients Answer: B
- Which irrigation method generally uses water most efficiently? A. Surface (flood) irrigation B. Furrow irrigation C. Drip (trickle) irrigation D. Basin flooding Answer: C
- Which soil is most likely to become waterlogged after heavy rain? A. A sandy soil with large pores B. A heavy clay soil with tiny pores C. A well-structured loam D. A gravelly soil Answer: B
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Drainage And Irrigation? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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