Quiz 4

Question 1

what does soil color share the most

Answer 1

internal drainage and organic matter percent

Question 2

what is the size of soil?

Answer 2

sand: 0.05mm-2.0mm
silt: 0.002mm- 0.05mm
clay: <0.002mm

Question 3

what is the best type of soil?

Answer 3

loam

Question 4

what clay is the non-swelling type

Answer 4

Kaolinite

Question 5

what is the difference between texture and structure in soil

Answer 5

Texture determines soil water-holding capacity, permeability, and soil workability
Structure determines soil particles various sizes and shapes in aggregates

Question 6

tillage:

Answer 6

Destroys structure overtime and reduces porosity

Question 7

bulk density

Answer 7

mass per unit volume of oven-dry soil

Question 8

Soil structure:

Answer 8

Single, granular, platy, blocky, prismatic
bad^^, good^^^, bad^^, good^, good^^^

Question 9

Density of water

Answer 9

1g/cm^3

Question 10

Density of Quartz

Answer 10

2.65g/cm^3

Question 11

particle density weight

Answer 11

2.65g

Question 12

pore sizes

Answer 12

macropores and micropores

Question 13

macropores

Answer 13

> 0.08 mm
between aggregates and water only moves up and down

Question 14

micropores

Answer 14

<0.08mm
inside aggregates and water moves all directions

Question 15

what is the size of the small cube?

Answer 15

162ft^2