Soil Conservation & Land Use (Agron 2820) - Examination 1 Review

Flashcards covering material from Examination 1, including agricultural statistics, historical land use in Mesopotamia and China, soil properties, and basic biological formulas.

Iowa Human Population

3 million

Iowa Total Land Area

36 million acres

Acres of Farmland in Iowa

33 million acres

How many farms does Iowa have

85,000

Acres of Cropland in Iowa

25 million acres

Acres of Pastureland in Iowa

3 million acres

Acres of Woodland in Iowa

2 million acres

Iowa Corn Harvest (Annual Avg)

13 million acres

What percent of the calories that Iowa produced in 2024 was from corn?

66%

How many pigs does Iowa produce in a year

60 million

2024 Iowa Crop Calorie Production

400 trillion

How many people can iowa feed while taking into account direct and indirect movements of calories

60-80 million

How many acres of farmland does iowa lose per year

20.000

Global Arable Land

4 billion acres

Mesopotamian Crop Domesticates

Wheat and barley

Loess Plateau Cropping History

7,000 years

Loess Color

Yellow

Soybean Domestication

China

Dust Bowl Timing

50 years after settlers from Iowa and other areas moved to Oklahoma.

Water Needs for Corn Grain

5,000 tons

Plant Soil Nutrients

17

Plant Soil Nutrients needed from soil

12

Aerobic Respiration Formula

$$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O$$

when did agriculture start in mesopotamia

13,000 BP

Mesopotamian Rivers

Tigris and Euphrates

Mesopotamian Failure Causes

Land degradation and salinization.

when did farming start in greece

9000 BP

when did farming start in rome

4000 BP

China Loess Plateau Gullies depth

600 feet

Iowa Farm Count

90,000

Iowa Farmland to Urban Conversion Rate

20,000 ac/yr.

Fayette Soil A Horizon

The top layer- Maximum biological activity

Fayette Soil E Horizon

Eluviation

Fayette Soil Bt Horizon

Illuviation

Fayette Soil C Horizon

Parent Material- Loess.

Photosynthesis Formula

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$$

lees rule of thumb

1 ton of corn requires 100 tons/acre of plant available water during the growing season