Unit 3

Question 0

Compaction increases ……

Answer 0

Increases soil strength but inhibits root growth

Question 1

Density =

Answer 1

Weight / Volume

Question 2

Bulk Density is measured using what condition of soil?

Answer 2

Undisturbed, Dry Soil

Question 3

What is the Bulk Density rating of soil that has restricted root growth?

Answer 3

1.6 g/m3

Question 4

What is the bulk density rating of compacted soil?

Answer 4

2.0 g/m3

Question 5

What texture is a soil that compacts easily?

Answer 5

Fine textured soils

Question 6

What texture is a soil that doesn’t compact easily?

Answer 6

Coarse Textured soils

Question 7

What influences the bulk density of soil?

Answer 7

• ability of the soil to function as structural support
• ability for water and solute movement
• soil aeration

Question 8

What does High Bulk Density indicate?

Answer 8

• low soil porosity

- soil compaction

Question 9

What is Soil Tilth?

Answer 9

The physical condition of the soil as related to its ease of tillage or cultivation

Question 10

What is Soil Tilth often referred to as?

Answer 10

Soil Condition

Question 11

What is Tilth dependent on?

Answer 11

It’s dependent on the stability of aggregates.

Question 12

Define: Aggregate Stability

Answer 12

Ability of soil particles to continue to be held in a single mass or cluster

Question 13

What are the factors that increase aggregation of particles?

Answer 13

Organic Matter
Limestone
Biological Activity

Question 14

What are the factors that decrease aggregation of particles?

Answer 14

Sodium (Na) - it makes them fall apart

Question 15

Yellow Soil =

Answer 15

Drainage Problem (usually a season problem)

Question 16

Blue/Gray soil =

Answer 16

Serious drainage problem that needs to be addressed!

Question 17

Red Clay =

Answer 17

Good aeration

Question 18

Green Soil =

Answer 18

High levels of copper…which means low pH…

Question 19

Black/Brown soil =

Answer 19

High in OM

Question 20

White Soil =

Answer 20

No OM …. Sandy

Question 21

What are some soil colors that are encouraged by well aerated conditions?

Answer 21

Red
Brown
Yellow

Question 22

What are some colors encouraged by poorly aerated conditions?

Answer 22

Gray

Blue

Question 23

What system is used to determine your soil color?

Answer 23

Munsell Color System

Question 24

Where is the Munsell Color System used?

Answer 24

Anywhere in the world

Question 26

Why did they change the name to Rutgers College?

Answer 26

Colonel Henry Rutgers donated $5000 to the school.

Question 27

What did George H. Cook do that was so important? What year did he do it?

Answer 27

1840….He revised the New Jersey Geological Survey….which became the model for the U.S. Geological Survey

Question 28

Average Bulk density of soil is ?

Answer 28

1.33 g/m3