Aim: To explain the concept of sustainable agriculture in terms of energy efficiency ratios and sustainable yields.

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Presentation transcript:

Aim: To explain the concept of sustainable agriculture in terms of energy efficiency ratios and sustainable yields.

What is a sustainable yield? Sustainability - meeting the needs of the present without compromising the ability of future generations to meet their own needs. A sustainable yield involves the production of food in such a way as to maintain the capacity for growing food from the same land in the future. Production of sufficient food Farmers standard of living/profits Soil conservation and soil health Nutrient recycling e.g. animal waste being used for fertilizer Biodiversity –a minimal use of chemicals on the land Animal welfare Fair wages and treatment for workforce – farm is part of the rural community Which are social, economic and environmental?

What is energy efficiency ratio? Measures of the amount of energy put into a system compared with the output. Inputs : outputs Put these in order from most to least efficient.. Shifting cultivation Deep sea fishing Intensive poultry farming Rice cultivation on terraces Cattle grazing Dairy farming Coastal fishing Shifting cultivation 1:20 Rice cultivation on terraces 1:5 Cattle grazing 1:2 Dairy farming 1:1 Coastal fishing 1:1 Intensive poultry farming 2:1 Deep sea fishing 10:1

Sources of energy include: Indirect Fertilizers and pesticides Seeds Irrigation Electricity (eg. Greenhouse) Transport Direct Labour Machinery Fuel Financial Capital Whilst farming in HIC’s may be highly productive – it is not always energy efficient, requiring many inputs for success

Factors affecting efficiency Am I more or less efficient? Greenhouse Open field Subsistence Cash crop Beef farming Rice farming Cooler climate Warmer climate Wetter climate Drier climate

How can farmers increase sustainability?

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