Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Agriculture Lecture: Slash and Burn to Industrial Agriculture and Genetic Engineering - Pr, Study notes of Ecology and Environment

An overview of the evolution of agriculture from slash and burn methods to industrial agriculture, including the use of fertilizers and pesticides. The document also discusses the potential benefits and drawbacks of industrial agriculture, focusing on human health and environmental issues. The lecture concludes with a discussion on genetic engineering in agriculture and its safety.

Typology: Study notes

Pre 2010

Uploaded on 08/18/2009

koofers-user-pi2
koofers-user-pi2 🇺🇸

10 documents

1 / 4

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
1
Today’s Outline Announcements
!History
!SlashandBurnAg.
!IndustrialAgriculture
!Potentialproblemsin
paradise?
!GeneticEngineering
Ecology (BIOL 250)
Lecture 23: Agriculture
Fire
(Homo
erectus)
Homo
sapiens
Agricultural
revolution
H u n t i n g a n d g a t h e r i n g
Industrial revolution
Cultural evolution of agriculture
Slash and burn (Swidden) Agriculture
Slash and Burn Agriculture
Slash and Burn Agriculture
Cultural evolution of agriculture
"Slash and burn
"Early intensification
#Terracing
#Rice Farming
pf3
pf4

Partial preview of the text

Download Agriculture Lecture: Slash and Burn to Industrial Agriculture and Genetic Engineering - Pr and more Study notes Ecology and Environment in PDF only on Docsity!

Today’s Outline (^) Announcements ! ! ! ! !

Ecology (BIOL 250)

Lecture 23 : Agriculture Fire (Homo erectus) Homo sapiens Agricultural revolution

H u n t i n g a n d g a t h e r i n g

Industrial revolution

Cultural evolution of agriculture

Slash and burn (Swidden) Agriculture

Slash and Burn Agriculture

Slash and Burn Agriculture Cultural^ evolution^ of^ agriculture

"Slash and burn "Early intensification #Terracing #Rice Farming

Cultural evolution of agriculture

"Slash and burn "Early intensification "Industrial agriculture #Mechanization #Fertilize the soil with artificial chemicals #Control pests with biocides

Industrial Agriculture - Mechanization

The farm beginning to approximate more closely to a factory. “Agriculture, ancient and modern” (Samuel Copeland 1865 ). "Lack of nitrogen, potassium, and phosphorus often limits plant growth. #Adding nutrients via fertilizer usually stimulates growth and increases crop yields. #Manure and nitrogen-fixing bacteria are alternative methods of replenishing soil nutrients.

Industrial Agriculture - Fertilizer Industrial Agriculture - Fertilizer

Pest Control

Industrial agriculture - PESTICIDES Industrial agriculture

Input Vs. Output

"Spraying

kills high percentage of pests, but...

"Resurgence

all pests are never killed! Due to genetic resistance and

natural “hide-outs” "Secondary pest outbreaks

due to killing of beneficial insects

"Evolution of resistance

Industrial agriculture - Pesticide Treadmill

How it functions

Genetic Engineering

"Genetically Modified Organisms (GMO’s) #Contain DNA possessing genes borrowed from unrelated species. "Can produce crops with pest-resistance and wider tolerance levels. "Opponents fear traits could spread to wild varieties, and increased expense would largely hurt smaller farmers. #Estimated that 60% of all processed foods in North America contain transgenic products.

Is Genetic Engineering Safe?

" Environmental and consumer groups have campaigned against “transgenic” organisms. #“Frankenfoods” " U.S. Food and Drug Administration declined to require labeling of foods containing GMO’s. #New varieties are “substantially equivalent” to related traditionally-bred varieties.

Genetic Engineering