organic farming

Document Sample
organic farming Powered By Docstoc
					Done By: Ang Ray Yan
         Bryan S Wang
- Definition

- Rationale

- Methods

- Impacts

- Video
Organic Farming is the form of agriculture relying on:
       - crop rotation
       - green manure
       - compost
       - biological pest control
       - etc…

to control soil productivity and control pests without:

       - synthetic fertilizers
       - synthetic pesticides
       - livestock feed addictives
       - genetically modified organisms
    Reliance of Synthetic                          Increased environmental
          Fertilizers                                     awareness



- Reduced transport cost                        - An increasing consumer market

- Reduce pollution                              - Sustainable form of farming


    Government Subsidies                                Premium Prices



- Incentives for farmers                        - More revenue for farmers




It is believed that Sir Albert Howard was responsible for the organic farming
movement, beginning in the early 1930s.
Soil management:

- Plants need nitrogen, phosphorus and micronutrients,
  which originate from the soil.

Weed control:

- Handweeding, natural herbicides
- One recent innovation includes the introduction of
  ducks and fish into paddy fields.

Controlling pests:

- Use of natural predators and diverting focus on plant
  health.
Crop Rotation:

growing multiple crops to
prevent the overuse of a
particular nutrient.



                                     Green Manure:

                                     These are cover crops which help prevent the
                                     growth of weeds, soil erosion and most
                                     importantly provide nitrogen for plants.



Natural pH adjustments:

The use of lime and sulfur help balance the pH
of the soil to suit to suit the growth of plants.
Mulches:

Mulches cover the soil to prevent the growth
of weeds, moderate temperatures, and
prevent soil erosion


                             Organic Herbicides:

                             Organic Herbicides include Spices and Vinegar.
                             However D-limonene (Citrus oil) is the most
                             environmentally safe as it strips the weeds of
                             its cuticle, causing dehydration and death.

Solarization:

Clear plastic is spread across the
ground in hot weathers to absorb heat
required to kill pathogens and weeds.
Natural Predators:

Natural Predators that are not harmful
to crops are employed in the fields to
remove insects, anthropods, etc.
                                           Minute pirate bug    Big eyed Bug

                                    Organic Fungicide:

                                    Organic fungicides are effective against
                                    diseases concerning the roots. (e.g. Bacillus
                                    subtilis). Potassium and sodium bicarbonate
                                    are also effective against fungus.


Less toxic organic insecticides:

These insecticides repels or kills most pests
and does not affect the growth of crops and
most beneficial insects. (e.g. Neem derivatives)
Type of impact   Developing Countries          Developed Countries
Social           There might not be much       Those changing from the
                 change as most forms of       impacts of the Green
                 traditional farming are       Revolution could receive
                 somewhat organic.             government subsidies as
                                               incentives for organic farming,
                                               a more eco-friendly alternative.

Economy          Farmers could grow richer     Prices could become more
                 due to the premium prices     expensive as the demand for
                 organic crops are sold at     healthier food rises in
                 and reduced cost as no        developed nations.
                 fertilizers are needed,
                 boosting the economy of
                 the country.
Environment      Less pollution in water supplies and less damage to global
                 warming.

                 Insects dependent on weeds to survive might face extinction
                 if organic farming continues to spread across the world.
http://www.dailymotion.com/video/xa3gdd_planet-earth-our-
loving-home-how-to_tech
Questions?

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:19
posted:8/31/2012
language:English
pages:11