Global food and agriculture.docx

5 Pages
Unlock Document

Simon Fraser University
Resource & Environmtl Mgmt
REM 100
Karen Ruckman

Global food and agriculture Method for food production: 1. Expand the area of agriculture  Protect existing farmland by reducing degradation  More land into operation 2. Expand per hectare production in agricultural exporting countries  Increase industrial agriculture productivity in developed countries using pesticides, fertilizers, and irrigation techniques 3. Increase total farm productivity  Increase productivity of existing farmland Environmental Effects of CURRENT Agriculture - Biodiversity loss - Soil degradation - Air Pollution - Global Warming (Fertilizers and fossil fuel use) Option 1. Land Degradation: - Causes decline in agricultural productivity Causes: • Water/wind erosion • Waterlogging & Salinity • Loss of soil fertility (b/c of nutrient depletion) • Compaction and crusting • Acidification and toxic pollution Potential Solutions:  Encourage natural processes and relationships  Reduced use of damaging inputs  Greater use of local knowledge  Increase self-reliance b/w farmers and equity for access to productive assets  Emphasis on integrated production system that include conservation Option 2. Industrial agro-chemical based agricultural system - Pesticides reduce beneficial species – Worms, pollinators - Pests  Gain resistanceMore pesticides used Irrigation Systems - Artificial application of water to land/soil  Evaporation leaves salt behindDecrease in fertility  Plants weakened More vulnerable to pests More pesticides  Run-off from fields contain salt, fertilizers and pesticides into streams/rivers Costs  Stresses water source Potential problems  Poor X buy pesticides  Energy intensive Option 3. Preserve existing soils Irrigation efficiency - Pipelines instead of ditches - Downward pointing irrigation - Computer controls to prevent overwatering - Low tillage and mulching improves soil structure - Green manure suppresses weeds
More Less

Related notes for REM 100

Log In


Don't have an account?

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.