Some education for you.
1. The purposes of this information note are to:
• Outline the benefits of organic farming that the Scottish Government recognise.
• Give information on the organic sector in Scotland.
• Detail sources of further information
2. Organic Farming: an introduction
Organic farming plays a valuable role in helping to protect and enhance the environment as well as assisting producers to meet consumer demand for organic products. Evidence has shown that there are significant biodiversity, pollution control, energy efficiency and soil protection benefits associated with organic farming.
Organic farming is based on enhancing the natural biological cycles in soil (e.g. nutrient cycling in the soil), crop (e.g. encouraging natural predators of crop pests) and livestock (e.g. development of natural immunity in young animals); on building up soil fertility through the use of nitrogen (N) fixation by legumes and enhancing soil organic matter; and on avoiding pollution. Thus the aim is to work with natural processes rather than seek to dominate them, and to minimise the use of non-renewable natural resources such as the fossil fuel used for the manufacture of fertilisers and pesticides. Organic farming principles also encompass high animal welfare standards and the improvement of the environmental infrastructure of the farm.
Any farmer wishing to produce food for sale as organic must comply with EU Regulation 2092/91, which became operational in January 1993 (to be replaced on 1st January 2009 by EU Regulation 834/2007). This regulation sets out the minimum standards of production and stipulates that organic farmers must be registered with an organic certification body which itself must be approved by Defra, the National Certifying Authority for the UK.
3. Business Prospects
In 2007, the market for organic food was worth around £1.5 (Mintel, 2007), having increased by 70% since 2002. Increased product availability and rising consumer interest in health and premium food markets have fuelled sales. It is predicted that demand will continue to grow but, at present, further expansion in retail sales is constrained by lack of supply of primary product, at least for some products such as milk, eggs, table birds, pork, beef, and a seasonal undersupply of lamb. The expansion of non-ruminant production in particular is being held back by a severe shortage of organic feed grain. Vegetables (including potatoes) are profitable with ready markets, although production costs can be high.
These shortages are to some extent a result of the relatively slow rate of conversion of farms in the last 3-4 years, after a very rapid expansion of the sector in the late 1990’s and in 2000 to 2001. At the farm gate, therefore, prices are good for most products, particularly organic grain, beef and lamb (although seasonal over supply can make marketing of lamb challenging in the autumn glut period). Premiums for organic store cattle and lambs have also been available. The two year conversion period (when yields are reduced, no full organic premiums are available, and some investment costs may be necessary, e.g. for reseeding) is the most challenging period
financially, but once the organic system has been fully established, good market prospects and generally lower input costs should result in improved business profitability.
4. Contribution to Biodiversity
Many organic units comprise mixed farming systems and several studies have shown that mixed farms, both in upland and lowland situations, have a positive impact on biodiversity because of the mixed range of habitats provided spatially and over time[5;33;23;15]. Table 1 provides an illustration of the positive effects that organic farming can have on biodiversity in comparison to conventional arable, conventional mixed lowland, and LEAF farms [17].
Table 1. The impacts of farming operations in four farming systems on the biodiversity of soil organisms, plants, invertebrates, birds and mammals (the higher the score, the more beneficial the impact)[17].
|
Agricultural Practice |
Conventional Arable |
Conventional
Mixed Lowland |
LEAF |
Organic |
|
Cultivation |
-1.5 |
-1.5 |
-1.5 |
-1.5 |
|
Production |
-2.0 |
-1.0 |
-1.0 |
+4.0 |
|
Protection |
-6.0 |
-6.0 |
-6.0 |
-0.5 |
|
Post Cropping |
+4.5 |
+9.5 |
+9.5 |
+11.5 |
|
OVERALL |
-5.0 |
+1.0 |
+1.0 |
+13.5 |
4.1 Flora
The non use of agrochemicals is probably the key factor in increasing floral diversity on organic farms[12]. Synthetic herbicide and pesticide use can have a dramatic negative impact on wild flora[45]. A study of adjacent conventional and organic farms in England[42] showed that organic farms support significantly rarer and declining plant species. In another study[2], the diversity of threatened floral species within the field and in crop margins on organic farms was approximately double that of conventional farms. Evidence suggests that the use of agrochemicals can have a major negative impact also on faunal numbers and diversity[45].
4.2 Birds & bats
The BTO (British Trust for Ornithology) study of 22 paired organic and conventional lowland farms in England and Wales[9] showed that the density of all the bird species studied was greater on the organic holdings and was in proportion to the greater availability of invertebrates and other food sources. Other research into the abundance and diversity of insectivorous mammals, including bats, has also shown that the population and diversity of species is greater on organic than on conventional farms[4, 48], for similar reasons. Fuller et al. (2005)[15] concluded that organic holdings were likely to support 5-48% more spiders, 16-62% more birds and 6-75% more bats than conventional holdings based on data collected over 89 paired farms in England, including several upland ones.
Reducing stock numbers in pastures is likely to have a range of benefits for ground-nesting birds including the creation of more complex sward structures, reduced trampling and positive effects on food resources[14]. Stubbles can be particularly beneficial as food sources[20,49] and the
relatively greater use of spring cropping on organic farms is likely to be beneficial in this instance[9, 50,51].
4.3 Invertebrates
A German study[16] concluded that the population and diversity of insect-pollinated plants are greater under organic farming, compared to conventional cropping systems, presumably because invertebrate abundance and activity is greater. Organic standards prevent the routine use of prophylactic veterinary drugs and an Irish study[24] found that organic farming was beneficial to dung beetle communities, with dung on organic farms possessing greater beetle biomass than dung on intensively managed grassland. The number of beneficial predatory invertebrates (e.g. ladybirds and ground beetles) has also been found to be higher on organic systems compared to conventional systems [19,41]. The practice of undersowing, common in organic systems, is known to encourage earthworms and other beneficial soil fauna activity. The greater emphasis on clover in organic compared to conventional farming systems is beneficial to butterfly and bee species, including bumblebees[45;10].
5. Contribution to valued and attractive landscapes
A number of studies[9;25;39;40], have shown that on average, organic farms had a more attractive landscape than either extensive or intensive conventional farms of a similar type.
6. Contribution to protection and enhancement of water and soils
Mineral N fertiliser is prohibited in organic standards. Artificial sources of P & K are prohibited although some natural products may be permitted under certain circumstances. In organic farming, N is generated by legumes (e.g. grass/clover swards) and nutrient supply to crops is maintained by efficient recycling of manures, and by optimising soil N mineralization. This organic approach of recycling or restricting P & K, will tend to lead to lower soil indexes, compared to unrestricted nutrient application,
The non-use of inorganic N fertilisers is likely to reduce leaching, particularly when comparing net losses over the whole rotation and assuming timing and husbandry operations are sympathetically undertaken[35]. A review of European literature[43] also concluded that nitrate leaching per hectare from organic farms was generally less than conventional farms. Reduced use of P in less soluble forms, as happens on organic farms, is also likely to reduce impacts on water and eutrophication[25].
Soil flora and fauna are also likely to benefit from the non-use of mineral N fertilisers, as these chemicals are associated with reductions in arbuscular mycorrhizae (AM) and other soil fungal populations and diversity[34]. The beneficial effects of AM fungi including improved soil structure are liable to be stimulated in organic systems[6, 31].
On organic farms, it is often the practice to undersow cereal crops with grass/legume seed mixture. This provides soil cover which suppresses weeds, enhances crop fertility and grazing after harvest and in addition prevents nutrient leaching over winter on uncropped land. There is little evidence that storage and handling methods of slurries, manures and compost are significantly different between organic and conventional farm holdings[13]. However, the lower stocking density predominant in organic farming systems would tend to result in lower production of livestock manures per holding and hence lower risk of N leaching. Overstocking is also known to be a major factor in soil erosion, thus the lower stocking rates in organic systems should help to minimise risk of erosion.
As for feeding the world, we can do this already. Some people eat to much and get fat, some people dont get enough, the problem is with distribution.