Exploring the Soil Textural Triangle

The video tutorial explains how to use the soil textural triangle to determine soil texture from samples. It covers the components of the triangle: clay, silt, and sand, and demonstrates how to analyze soil samples by plotting their percentages on the triangle. The tutorial also discusses the properties of different soil textures, such as water infiltration, aeration, and workability, using examples of sandy loam and silt. The video aims to help viewers understand soil texture classification and its practical implications.

What are the three components of the soil textural triangle?

• Silt, Gravel, and Sand

• Clay, Silt, and Gravel

• Clay, Gravel, and Sand

• Clay, Silt, and Sand

In the soil textural triangle, where does the clay percentage start and end?

• 0% at the bottom to 100% at the apex

• 0% at the bottom to 50% at the apex

• 100% at the left-hand side to 0%

• 0% at the apex to 100% at the right corner

For a sample with 75% sand, 10% silt, and 15% clay, what is the soil texture?

• Loamy Sand

• Clay Loam

• Silt Loam

• Sandy Loam

If a soil sample has 75% sand, 10% silt, and 15% clay, what should the total percentage be?

• 90%

• 110%

• 95%

• 100%

In the second example, what is the percentage of silt?

• 10%

• 15%

• 75%

• 83%

What is the texture of a soil sample with 10% sand, 83% silt, and 7% clay?

• Sandy Loam

• Silt

• Clay Loam

• Loamy Sand

How do you calculate the missing silt percentage if you have 42% sand and 37% clay?

• Subtract the sum of sand and clay percentages from 100

• Add the sand and clay percentages

• Multiply the sand and clay percentages

• Divide the sum of sand and clay percentages by 2

What is the calculated silt percentage for a sample with 42% sand and 37% clay?

• 42%

• 37%

• 21%

• 79%

Which soil type has medium water infiltration, aeration, and workability?

• Gravel

• Sand

• Clay

• Silt

What is the water infiltration characteristic of sandy loam soil?

• Excellent

• Very poor

• Poor

• Between good and medium

Tags

NGSS.MS-ESS2-4