when tillage begins, other arts follow. the farmers, therefore, are the founders of human...

When tillage begins, other arts follow.  The farmers, therefore,

are the founders of human civilization. 

Daniel Webster, Remarks on Agriculture

How long has man been farming?

• Our planet is around 5 billion years old• Man (Homo sapiens) have been around for 100-

200, 000 years• Man has been farming for around 10, 000 years• Agriculture is the world's largest economic

sector. • On a worldwide basis, more people are involved

in agriculture than in all the other occupations combined.

What is sustainable agriculture?

• An integrated system of plant and animal production practices that over the long term:

• satisfy human food and fiber needs• enhance environmental quality and the natural resource

base upon which the agricultural economy depends • make the most efficient use of nonrenewable resources

and on-farm resources and integrate, where appropriate, natural biological cycles and controls

• sustain the economic viability of farm operations • enhance the quality of life for farmers and society as a

whole.

Farming 101• The basic processes

of farming include:• preparing the land• Fertilization• Irrigation• weed and pest

control.

Preparing the land• Machinery powered by

fossil fuels prepare the soil

•Plowing was done by the farmer or draft animals

Fertilizing

• Fertilizer was animal manure

• Synthetic Fertilizer

Irrigation

• Irrigation involved water flowing through ditches

• Modern overhead irrigation

Removing weeds

• Weeds were removed by hand

• Synthetic herbicides

Controlling pests

• Biological control • Pesticide sprayer

http://www.wpro.who.int/hse/pages/agriculturallist.html

Harvest

• Harvesting corn by hand

• Combining corn

Precision agriculture - http://www.youtube.com/watch?v=hJcrDRnuLCU

Conventional Corn in Iowa

• May 16, 2007 32,000 treated corn seeds/acre planted

• May 17, 2007 fertilized with145 lbs Nitrogen/acre along with 2.25 oz/acre of Balance Pro™ herbicide.

• June 25 sprayed with 0.66 oz/acre of Accent, (herbicide) 1 pt/acre of Buctril, (herbicide) 4 oz/acre of NIS, and 1.5 lbs/acre of AMS (herbicide).

• October 29th harvest (188bu/acre)

Iowa Agriculture

• Over 90% of Iowa’s land is used for agriculture

• Iowa ranks 1st in the U.S. for corn and soybean production

• There are 13.9 million acres of corn in Iowa with a value of $9.47 billion

• Iowa is home to 19.2 million hogs• Iowa chickens produced 13.9 billion eggs

in 2007

What is all this corn for?

• Animal feed• Ethanol• Of 10 000 items in a

grocery store, how many contain corn?

• 2 500• Corn syrup, cornmeal,

cornstarch, sorbitol, medicines, cosmetics, xanthan gum

The changing nature of farming

• There are 5 million fewer farms in the U.S. than there were in the 1930’s

• Between 1974 and 2002, the number of corporate-owned U.S. farms increased by more than 46 percent.

• The U.S. has the cheapest food in the world

• At what cost?

Is conventional agriculture sustainable?

Ecological concerns include:• Loss of soil organic matter• Erosion• Non-point source pollution• Eutrophication• Salinization• Water scarcity• Loss of wetlands• Pesticide resistance• Reduced genetic diversity

Economic and social concerns include:

• Increasing numbers of agri-businesses

• Loss of family farms• Loss of rural

communities and local markets

• Urban sprawl

Health concerns

• Pesticide residues in food

• Antibiotic resistance due to over use in animal production

• Farm workers poisoned by farm chemicals

• Pesticide drift

• Nitrate contamination of drinking water