Organic Farming

Organic Farming Methods

Organic farming is not just one cookie-cutter way of farming. It's a collection of techniques and practices that shun certain industrialized aspects of modern agriculture.

Naturally-Derived Agrochemicals

Every plant requires an array of nutrients to grow well, with the two biggest ones being nitrogen and phosphorous. These nutrients are found in nature, but humans can artificially add them to the soil to ensure crops grow better, faster, and more reliably. While the synthetic fertilisers and pesticides used today are more potent than ever before, humans have actually been using naturally found versions of them for thousands of years.

Fig. 1 - Sign warning gardeners to not spray pesticides on an apple orchard in Washington State.

Ground-up bones, animal manure, and even some essential oils have a history of usage as fertilisers and pesticides. All of these are found naturally occurring in nature with minimal processing required, so they are considered acceptable in organic farming.

Compared to conventional farming, the overall agrochemical use on organic farms is much less.

Crop Rotation

While also practised in some non-organic farms, crop rotation is especially important in organic farming. Growing the same crop on a plot of land over and over is known as monocropping. While this can be a profitable practice, it is very damaging to the soil, depriving it of key nutrients, eroding it, and dooming future crops to failure if no intervention is made. By switching out what crop is used each season or every couple of growing seasons, the negative impact on soils can be reduced or eliminated.

Cover Cropping

As previously stated, planting the same crop over and over results in soil erosion, meaning the nutrient-rich upper soils are removed. Often, as part of a crop rotation schedule, cover crops are planted outside the regular growing season. During times of the year when profitable crops can't be grown, a cover crop is planted to protect the soil, which prevents erosion and restores nutrients. Cover crops can also be used as feed for livestock before a new crop is planted. Not all cover crops add nutrients to the soil, but some, like clover, can increase nitrogen levels in the soil, which is one of the most impactful fertilising nutrients.

Integrated Pest Management

To reduce the impact on the environment and human health that comes from using synthetic fertilisers while still combatting pests, a system called integrated pest management (IPM) has been implemented on many organic farms. The focus of IPM is not on the total eradication of pests but on controlling their populations in the least invasive ways possible, balancing crop health with the environment.

Fig. 2 - Plough in Lincolnshire, England, turning up the soil and exposing insects to natural predators, in this case, gulls. Using natural predators compared to chemicals is a component of integrated pest management.

The traditional solution to pests is to apply heavy amounts of pesticide, both as a preventative measure and in response to pests. IPM seeks to use small amounts of pesticides only once a threat is present, but focuses on non-chemical controls like weeding by hand or introducing natural predators to reduce pests. Prevention is also a key part of IPM, ensuring that farms are not creating environments conducive to pest infestations.

Advantages of Organic Farming

The appeal of organic farming is not just for people who want to eat more "natural" foods. It comes with several tangible benefits.

Sustainability

Today's modern farming, while highly productive, causes much more environmental damage than traditional agriculture. Pesticides can negatively impact native plant and animal life, leading to biodiversity loss and habitat destruction. When over-applied, fertilisers can end up in bodies of water and, through a process called eutrophication, end up starving them of life, even resulting in toxic water supplies. While organic farming does not eliminate agrochemical use entirely, it is used much more sparingly, and a focus is placed on minimising environmental impact.

Fig. 3 - Organic farm in Sintra, Portugal

The practice of crop rotation also promotes sustainable use of the land. By giving the soil time to replenish, there's no need for the application of synthetic fertilisers, and thus, none of the negative side effects that come with it. Soil is more delicate than it seems, and organic farming can allow for more sustainable farms and healthy local ecosystems.

Higher Market Prices

Because many people prize organic products as a more sustainable alternative to conventional food, it's generally priced higher. For the farmer, this means the generally higher costs of organic farming can be offset by charging their customers more for their products. Whether organic products are indeed superior to conventional ones in terms of health and taste is a more contentious matter, but some people feel it's worth the extra price for one reason or another.

Cons of Organic Farming

Organic farms are, by and large, better for the environment than conventional ones, but there are some downsides.

Lower Yields

The biggest downside to organic farming is that less food is produced overall compared to conventional farming. In conventional farming operations, getting the highest yields possible is paramount, with few concerns for environmental sustainability. This means synthetic fertilisers and pesticides are extensively used, causing faster and more reliable plant growth. For their part, organic farms shun the use of synthetic agrochemicals, which creates more unpredictability and lower yields in general.

The main problem stemming from this is that more land is then needed to grow the same amount of crops compared to conventional farms. In areas with rapidly growing populations, this might not be feasible and can exacerbate already fragile ecosystems if more land needs to be converted to farmland.

Higher Cost

Certain organic farming practices, like integrated pest management, are much better for the environment but are more labour-intensive. A process like weeding a field by hand requires lots of workers to accomplish. Because yields are more unpredictable, the risk of a year when crops fail and a farm is unprofitable is higher. However, all of this has to take into account the current price of organic crops. Even with the high costs compared to conventional farming, a farmer can come out with more profits due to favourable prices.

Organic Farming vs Conventional Farming

Let's summarise the differences between organic farming and conventional farming, looking at the factors of agrochemical use, impact on the environment, costs, and crop yields.