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Agricultural Issues

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by

Manvinder Kaur Bhamra

on 4 November 2013

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Transcript of Agricultural Issues

Agricultural Techniques
Till Farming
V.S.
No Till Farming
Method used to plant crops with tools that run through soil
EX. shoveling, raking, using cultivators or plows, etc.
Method used to plant crops without the use of tools which will alter the soil, herbicides can still be used
Till Farming v.s. No Till Farming
No Till Farming
CONs
Global

PROs
-Reduces labour(save money)
-Reduces fuel, irrigation and machinery
PROs
-Reduces carbon emissions
Pros & Cons
-May increase carbon-based
organisms (debatable)
Financial
-Reduces labour (less jobs
available)
Global
Financial
Soil
-Greatens albedo by absorbing less radiation when the moisture is dried by turning over to the top, causing global cooling
-Without tillage, the residues from crops will decompose. If we grow winter cover
crops on top, the carbon loss will be
slowed, and eventually reversed.
(the carbon holds the soil
particles together)
costs
-Provides monetary grants and rewards to farmers
-Better soil quality (more stable)
-Higher water infiltration rate and capacity
-Increases organism life and biodiversity
-Decreases erosion
-Increases amount of nutrients and water by
limiting evaporation
Till Farming
PROs
-Helps mix nutrients evenly
CONs
-Can cause crop diseases if they are harboured in surface residues and then spread due to tilling, which would produce unsellable crops
CONs
-Can attract harmful insects
Soil
-Loosens the soil, making it easier to plant
-Increases growing potential of poorly drained soil
-Dries the soil before you plant seeds (advantage in wetter climates)
Soil
-Herbicides are still used
-Reduces organisms living in the soil
-Dries the soil before seeding (disadvantage in drier climates)
-Causes soil to lose a lot of nutrients (fertilizer, nitrogen), as well as its ability to store water
-More runoff and erosion is caused (slower infiltration rate)
Financial
Global
-Increased carbon emissions (est'd that 78 bil.
metric tonnes of carbon that was trapped in
the soil has been released because of tillage)
-Lowers albedo – more global
warming
Financial
Soil
-May use herbicides
Full transcript