Using biological forms of fertilizer such as compost, animal manures, and legume cover crops, builds soil organic matter, even when routine tillage is used for weed control. Building soil organic matter increases soil water retention and nurtures more active soil microbial communities that retain nitrogen in the soil longer and transform it into non-reachable gaseous forms. There is a small but telling body of research in the US that suggests that improved soil quality influences the ability of crops to withstand or repel insect attack and plant disease.
Organic biological fertilizer sources release their nutrients slowly over time, providing more opportunity for the nitrogen to be digested by soil organisms and taken up by crops before leaching below the root zone. Increased soil organic matter in the soil leads to tighter nutrient cycling and greater water holding capability in organically managed soils, with the result that nitrate leaching from groundwater is about half that of conventionally farmed soils. Recent data from a 12-year study shows that fields under organic management had half the annual nitrate leaching losses than fields under conventional management.
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Organic farms use production practices with environmental benefits such as water management practices, no-till or minimum tillage, habitat maintenance for beneficial insects and vertebrates, and biological pest control. These ecologically protective practices contribute to enhanced ecosystem services and benefit water quality, soil health, and biodiversity.
Conventional farming typically uses minimal crop rotations, growing the same single crop year after year on the same land. This practice, known as mono cropping causes the depletion of nutrients and minerals. In order to continue growing crops in this depleted soil, nutrients and minerals must be added back in the form of hydrocarbon based fertilizers and mined minerals such as phosphate. Conventional GM farming is dependent on earth-based non-renewable resources. Mono cultures and the resulting poor health open the way for infestations of insects, diseases and weeds. Healthy bio-diverse soil keeps these infestations in check. The lack of biodiversity requires synthetic pesticides and herbicides to be used, further destroying the national soil biology.
Organic farming is agriculture that makes healthy food, healthy soils, healthy plants, and healthy environments a priority, along with crop productivity. Organic farmers use biological fertilizer inputs and management practices such as cover cropping and crop rotation to improve soil quality and build organic soil matter. By increasing the amount of organic matter in the soil, organic farmers enhance the soil’s ability to absorb water, reducing the impacts of drought and flooding. Improving soil organic matter also helps it to absorb and store carbon and other nutrients need to grow healthy crops, which, in turn, are better able to resist insects and diseases.
Organic production systems do not use genetically modified (GM) seed, synthetic pesticides or fertilizers. Some of the essential characteristics of organic systems include design and implementation of an organic system plan that describes the practices used in producing crops and livestock products; a detailed record keeping system that tracks all products from the field to point of sale; and maintenance of buffer zones to prevent inadvertent contamination by synthetic farm chemicals from adjacent conventional fields.
The use of genetic engineering, or genetically modified organisms (GMOs) is prohibited in organic products. This means an organic farmer can’t plant GMO seeds, an organic cow can’t eat GMO alfalfa or corn, and an organic soup producer can’t use any GMO ingredients. To meet the USDA organic regulations, farmers and processors must show they aren’t using GMOs and that they are protecting their products from contact with prohibited substances from farm to table.