Chapter 5, Problem 5.1P

To determine

The classification of soil based on United States department of agriculture textural classification chart.

Answer to Problem 5.1P

The classification of soil A as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Clay}}$.

The classification of soil B as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Sandy}\text{clay}}$.

The classification of soil C as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Loam}}$.

The classification of soil D as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Sandy}\text{clay}\text{and}\text{sandy}\text{clay}\text{loam}}$.

The classification of soil E as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Sandy}\text{loam}}$.

The classification of soil F as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Silty}\text{loam}}$.

The classification of soil G as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Clay}\text{loam}}$.

The classification of soil H as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Clay}}$.

The classification of soil I as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Silty}\text{clay}}$.

The classification of soil J as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Loam}}$.

Explanation of Solution

Calculation:

Consider soil A:

Refer Figure (5.1) “U.S. Department of agriculture textural classification (USDA)”

 in the text book.

Mark the percentage of sand for soil A as 20 %, percentage of silt as 20 %, and percentage of clay as 60 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil A as in Figure (1).

Refer Figure (1).

Hence, the classification of soil A as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Clay}}$.

Consider soil B:

Mark the percentage of sand for soil B as 55 %, percentage of silt as 5 %, and percentage of clay as 40 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil B as in Figure (2).

Refer Figure (2).

Thus, classification of soil B as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Sandy}\text{clay}}$.

Consider soil C:

Mark the percentage of sand for soil C as 45 %, percentage of silt as 35 %, and percentage of clay as 20 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil C as in Figure (3).

Refer Figure (3).

The classification of soil C as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Loam}}$.

Consider soil D:

Mark the percentage of sand for soil D as 50 %, percentage of silt as 15 %, and percentage of clay as 35 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil D as in Figure (4).

Refer Figure (4).

The classification of soil D as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Sandy}\text{clay}\text{and}\text{sandy}\text{clay}\text{loam}}$.

Consider soil E:

Mark the percentage of sand for soil E as 70 %, percentage of silt as 15 %, and percentage of clay as 15 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil E as in Figure (5).

Refer Figure (5).

The classification of soil E as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Sandy}\text{loam}}$.

Consider soil F:

Refer Figure (5.1) “U.S. Department of agriculture textural classification (USDA)”

 in the text book.

Mark the percentage of sand for soil F as 30 %, percentage of silt as 58 %, and percentage of clay as 12 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil F as in Figure (6).

Refer Figure (6).

Hence, the classification of soil F as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Silty}\text{loam}}$.

Consider soil G:

Mark the percentage of sand for soil G as 40 %, percentage of silt as 25 %, and percentage of clay as 35 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil G as in Figure (7).

Refer Figure (7).

Thus, classification of soil G as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Clay}\text{loam}}$.

Consider soil H:

Mark the percentage of sand for soil H as 30 %, percentage of silt as 25 %, and percentage of clay as 45 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil H as in Figure (8).

Refer Figure (8).

The classification of soil H as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Clay}}$.

Consider soil I:

Mark the percentage of sand for soil I as 5 %, percentage of silt as 45 %, and percentage of clay as 50 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil I as in Figure (9).

Refer Figure (9).

The classification of soil I as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Silty}\text{clay}}$.

Consider soil J:

Mark the percentage of sand for soil J as 45 %, percentage of silt as 45 %, and percentage of clay as 10 % in Figure (5.1) and mark the point of intersection of three lines.

Show the percentage of sand, silt, and clay of soil J as in Figure (10).

Refer Figure (10).

The classification of soil J as per the United States department of agriculture textural classification chart is $\underset{\_}{\text{Loam}}$.