Organic Farming : As a Climate Change Adaptation and Mitigation Strategy

Organic farming, as an adaptation strategy to climate change and variability, is a concrete and sustainable option and has additional potential as a mitigation strategy. The careful management of nutrients and carbon sequestration in soils are significant contributors in adaptation and mitigation to climate change and variability in several climate zones and under a wide range of specific local conditions. Organic farming as a systematic approach for sustained biological diversity and climate change adaptation through production management, minimizing energy randomisation of non-renewable resources; and carbon sequestration is a viable alternative. The purpose of potential organic farming is therefore to attempt a gradual reversal of the effects of climate change for building resilience and overall sustainability by addressing the key issues. Research is needed on yields and institutional environment for organic farming, as a mitigation and sequestration potential.

According to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), greenhouse gas (GHG) emissions from the agricultural sector account for 10-12% or 5.1-6.1 Gt of the total anthropogenic annual emissions of CO 2 -equivalent.However, this accounting includes only direct agricultural emissions; emissions due to the production of agricultural inputs such as nitrogen fertilizers, synthetic pesticides and fossil fuels used for agricultural machinery and irrigation are not calculated (IPCC 2007).
In general climate is one of the main determinants of agricultural production and climate alteration might cause variability in agricultural production.As climate pattern shifts, changes in the distribution of plant diseases and pests may also have adverse effects on agriculture.At the same time, agriculture proved to be one of the most adaptable human activities to varied climate conditions (Mendelson et al., 2001).It should be necessarily mentioned that refraining from the use of synthetic inputs does not qualify an operation as organic, as far as it is not accompanied by a proper farm design and management that preserves natural resources from degradation.
The Fourth Assessment Report of the IPCC (Inter-governmental Panel on Climate Change states that "a wide array of adaptation options is available, but more extensive adaptation than is currently occurring is required to reduce vulnerability to future climate change.There are barriers, limits, and costs, but these are not fully understood" (IPCC 2007).The Bali Action Plan from the UN Climate Change conference in Bali in 2007 (UNFCCC 2007) clearly emphasizes the importance of enhanced action on adaptation.Organic farming has an inherent potential to both reduce GHG emissions and to enhance carbon sequestration in the soil.(Table 1).However, the adaptation aspects of organic agricultural practices must be the focus of public policies and research.One of the main effects of climate change is an increase of uncertainties, both for weather events and global food markets.Organic agriculture has a strong potential for building resilience in the face of climate variability.Organic farming addresses many of the key challenges identified for adaptation to climate change and variability and it fulfils many of the criteria, which are seen as important general UN Millennium Development Organic farming.Reduce global warming by lowering emission of greenhouse gases hence temperature rise; 3.
Enhances biological diversity within the whole system and increase soil biological activity 4.
Minimizes indiscriminate use of pesticides affects on human and animal health, biodiversity of wildlife etc. & cause of environmental pollution.
Reduce energy loss for both animal and machine, and risk of crop failure.7.
Promote the healthy use of soil, water, and air, as well as minimize all forms of gaseous pollution that may result from agricultural practices.

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Highly adaptive to climatic change due to application of traditional skills, farmers knowledge, soil fertility building techniques and a high degree of diversity.

Challenges addressed
The main organic strategies are diversification and an increase of soil organic matter, which both could enhance resilience against extreme weather events.Organic farming avoids nutrient exploitation and increases soil organic matter content, hence soils under organic farming capture and store more water than soils under conventional cultivation.Production in organic farming systems is thus less prone to extreme weather conditions, such as drought, flooding, and water logging.Organic farming accordingly addresses key consequences of climate change, namely increased occurrence of extreme weather events, increased water stress and drought, and problems related to soil quality (IPCC 2007a).• Organic farming comprises highly diverse farming systems and thus increases the diversity of income sources and the flexibility to cope with adverse effects of climate change and variability, such as changed rainfall patterns.This leads to higher economic and ecological stability through optimized ecological balance and riskspreading.

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Organic farming is a low-risk farming strategy with reduced input costs, therefore, lower risks with partial or total crop failure due to extreme weather events or changed conditions in the wake of climate change and variability (Eyhorn 2007).As such, it is a viable alternative for poor farmers.In addition, higher prices can be realized for the products via organic certification.Higher The IPCC estimates that the reduction in the options of agricultural GHG mitigation is costcompetitive with non-agricultural options for achieving long-term climate objectives.However, the total amount of mitigation is difficult to quantify, because it is highly dependent on local environmental conditions and management practices.A win-win approach could be achieved by paying farmers for carbon sequestration (building organic matter), which sets up a scenario where CO 2 is removed from the atmosphere (mitigation) higher organic matter levels in soil increase the agro-ecosystem residence (adaptation) and improved soil fertility leads to better yields (production and income generation).The adaptive approach inherent to organic farming offers simultaneous climate mitigation benefits.Organic agriculture has a strong potential for building resilience in the face of climate variability (Table 2).
Organic farming as a mitigation strategy may address both emissions avoidance and carbon sequestration.The first is achieved through: • Lower N 2 O emissions (due to lower nitrogen input)-it is usually assumed that 1-2 percent of the nitrogen applied to farming systems is emitted as N 2 O, irrespective of the form of the nitrogen input.The default value currently used by the IPCC is 1.25 percent, but newer research finds considerably lower values, such as for semiarid areas (Barton et al. 2008).

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Less CO 2 emissions through erosion (due to better soil structure and more plant cover)-there usually is less erosion in organic farming systems than in conventional ones.

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Lower CO 2 emissions from farming system inputs (pesticides and fertilizers produced using fossil fuel).
The highest mitigation potential of organic farming lies in carbon sequestration in soils and in reduced clearing of primary ecosystems.Soil carbon sequestration is used to describe both natural and deliberate processes by which CO 2 is either removed from the atmosphere or diverted from emission sources and stored in the oceans, terrestrial environments (vegetation, soils and sediments).It is greatly enhanced through agricultural management practices (such as increased application of organic manures, conservation tillage, cover crops, nutrient management, irrigation, restoring degraded soils, pasture management, soil use of intercrops and green manures, higher shares of perennial grasslands and trees or hedges, etc.), which promote greater soil organic matter content and improve soil structure (Niggli et. al, 2008).Increasing soil organic carbon in agricultural systems has also been pointed out as an important mitigation option by IPCC (2007b).The global carbon sequestration potential by improved pasture management practices was calculated to be 0.22 t C per ha per year.Assuming 0.2 t C per ha per year for organic farming practices, the total carbon sequestration potential of the world's grassland would be 1.4 Gt per year at the current state, which is equivalent to about 25% of the annual GHG emissions from agriculture (FAOSTAT, 2009).
However, sequestration of CO2 in soils is not included in the clean development mechanism (CDM) agreed to in Kyoto protocol.The FAO Should play a leading role in this process, including the establishment of this process, including the establishment of a global soil carbon sequestration initiative, entrusted with the promotion of agricultural technologies that restore carbon pools and soil quality (e.g.organic agriculture, conservation agriculture) and to create tools to measure, monitor and verify soil-carbon pools and fluxes of green house gas emissions (viz.nitrous oxide) from agricultural soils, including crop lands and pastures.

CONCLUSION
Although remarkable, organic farming several critical issues remain to be resolved.To begin with, there is a need for more research.Recent research invalidates this prejudice, especially in the context of extensive farming systems, which characterize much of agricultural production in developing countries like India.Further research on this is, however, still needed.Currently the easy access to and increased development of local markets for the products, local processing possibilities, and export infrastructure are of particular importance for organic farming.For this, the role of international institutions and trade policies has to be discussed in context of organic farming.The institutional environment for organic farming as an adaptation and mitigation strategy also has to be identified, in particular, on a global level.To be successful, wider recognition of the potential of organic farming is needed among bodies that currently mainly promote pure conventional agriculture.