Moisture & Absorption

Q. Raman wanted to measure the percentage of water absorbed by a given soil sample. For this Raman took a plastic funnel, a filter paper (or a piece of newspaper sheet). He then took X g of dry, powdered soil and pour it into the funnel. He measured a certain amount of water in a measuring cylinder and pour it drop by drop on the soil. He did not let all the water fall in one spot and poured water all over the soil. He kept pouring water till it starts dripping. Which of the given formulas would be used by him to do so?

Given; ( X= Weight of soil taken); (U= Initial volume of water); (V= Final volume of water)

1. $\frac{V-U}{X}\times 100$
2. $\frac{X}{U-V}\times 100$
3. $\frac{U-V}{X}\times 100$
4. $\frac{X}{V-U}\times 100$

Q. Which of the following soils has the least capacity to hold the water?

1. 
   Sandy soil
2. 
   Loamy soil
3. 
   Clay soil
4. 
   Silt soil

Q. Continuously water-logged soils are advantageous for plant growth.

1. True
2. False

Q. Which among the following soil has the highest amount of moisture content ?

1. sandy soil
2. clayey soil
3. loamy soil
4. sandy loam soil

Q. Clayey soil is well aerated and retains more water.

1. True
2. False

Q. The water holding capacity is highest in the clayey soil.

1. True
2. False

Q. Hydroponic plants are plants grown without using any soil.

1. False
2. True

Q.

Appu’s father plans on opening an Anthurium flower farm. He read that Anthurium plants require soils with good water absorption capacity along with good aeration. He has three choices: Clayey soil, Sandy Loam soil and coco peat (an artificial soil made from coconut husks). He took 50 g of each soil and determined the volume of water it absorbed. He also determined the soil particle size using a microscope and tabulated the results.

$\begin{array}{ccc}\text{Soil Type}& \text{Volume of water absorbed by 50g of soil}& \text{Particle size}\\ \text{Clayey}& \text{35 ml}& \text{0.002 mm}\\ \text{Sandy Loam}& \text{15 ml}& \text{1 mm}\\ \text{Coco Peat}& \text{350 ml}& \text{1 mm}\end{array}$

Which soil should Appu’s father choose?

1. Coco Peat

2. Clay soil

3. Sandy soil

4. Can’t say

Q. If a 50 g sample of soil absorbs 15 ml of water, the moisture absorption is %.

1. 30
2. 10
3. 300
4. 3

Q. If a 100g sample of soil absorbs 20mL of water, the percentage of moisture absorption is ___%.

1. 15
2. 20
3. 30
4. 40