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Water retention is highest in soils which are rich in…

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Water retention is highest in soils which are rich in

A. sand, poor in humus and devoid of clay

B. clay and sand, but poor in humus

C. clay and humus, but poor in sand

D. clay, poor in humus and devoid of sand

QUICK ANSWER…

D

DETAILS…  

To refresh your memory,

  • Clayey soil is the most compact type of soil with a very high level of water retention.
  • Sandy soil is a coarse and porous kind of soil, with low level of water retention.
  • Humus is in-between clayey and sandy kind of soil, they have less water retention than clayey kind of soil, but higher than that of sandy soils.

Now for the right answer to the above question:

  1. A is not the right answer. devoid of clay? Rich in sand?
  2. B is incorrect. clay and sand?
  3. C is incorrect. clay and humus will have some water retaining ability, but this will be less than clay only.
  4. D is correct. this is the most water retaining combination. Devoid of sand, poor in humus but high in clay.
RELATED!  The increasing order of the particle size in the following soil types is…

KEY-POINTS…

You may please note this/these:

  • Clayey kind of soil is the most water retaining.
  • An option that features only clayey soil will definitely be the answer.

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/ culled from 2020 JAMB-UTME biology past question 8 /

Water retention is highest in soils which are rich in... » QuizTablet
Water retention is highest in soils which are rich in... » QuizTablet

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