Sample of different soil types are packed in glass tubes whose lower ends are plugged with cotton wool, if these tubes are suspended in a trough of water, water will rise highest after a few hours in
sand
loamy
clay
humus
Explanation
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The correct option is B. loamy.
Explanation
The height of water rise in soil tubes over time is governed by capillarity. While clay has the smallest pores and the highest potential for capillary rise, it also has the highest resistance to flow due to those tiny spaces, making the rise extremely slow.
Sandy soil has large pores, allowing water to rise fastest initially, but it reaches its maximum height very quickly and that height is the lowest among the three types.
Clay soil will eventually reach the absolute highest level, but this process takes a very long time (often days or weeks) because of its high resistance to flow.
Loamy soil, being a mixture, provides a balance. It has a faster rate of rise than clay and a higher potential height than sand. Therefore, within a moderate timeframe like "a few hours," water will have progressed significantly further in loam than in the slow-moving clay, resulting in the highest water level at that specific time.
Thank you all for your unending support and contributions. It is well appreciated. Correction has been made please.
C is correct ✔️
Water rises highest in clay..
Followed by loam..
Then Sandy soil
Clay--Loam--Sandy✔️💥
Please, my school, questions like this demand explanation for better understanding.
Myschool pls review the answer
Soil capillarity is highest in clay then loamy then sandy
So the correct option is C
Greetings, The Myschool Team.
The correct answer is C(clay) and not A(sand). There is a time difference for capillarity effect to manifest. While water levels rise highest initially in sandy soil, this is only initial, after a few hours, the water level is highest in loamy soil.
Reference: Essential Biology, Ninth Edition, pg. 166(Topic: "Basic Ecological Concepts: Water holding capacity of soil"). Thank you.
