Ploughing Towards the Future
by Stuart Harrison of Devon, UK
A few weeks ago I stopped my mare and the gig I was driving to watch a neighbour ploughing a field on his farm using a huge tractor and a brand new 12 bottom reversible plough. What caused me to stop and stare was that this neighbour had, a few years ago, told me that ploughing was now frowned upon, and that the new way of crop cultivation was “direct drilling” and that it attracted government payments for “carbon capture.”
At that time several years ago he had just invested in a piece of machinery whose cost, when he told me the price, made me wince. Fast forward a few years, and the expensive hunk of metal, wiring, pipes, tines and other appendages of the latest “uni~drill,” is now sitting unloved in a shed, covered in cobwebs, dust, and a sprinkling of hen droppings.
Ploughing is an age-old agricultural practice, a cornerstone of farming since it’s earliest beginnings. The method involves turning over the top layer of soil to prepare it for planting, effectively controlling weeds, aerating the earth, and incorporating organic matter into the soil structure. While modern agriculture has seen the rise of no-till and reduced-tillage methods, ploughing remains a vital process for many farmers to this day.
The advantage of ploughing lies in it’s ability to promote crop growth. It’s a practice that has evolved over centuries, adapting to technological advancements while maintaining it’s core purpose: to enhance soil quality and improve crop yields. The benefits ploughing offers, from soil aeration to weed control and moisture retention, means this age old methodology still has a role in sustainable agriculture.
The primary goal of ploughing is of course to prepare a seedbed that is conducive to uniform seed germination and growth. A well-prepared seedbed ensures that seeds are planted at the correct depth and have good contact with the soil, which is essential for successful germination. Ploughing is the first stage in creating a well prepared seedbed. It helps to break up large clods of soil, creating a finer and more even soil texture, further enhanced if necessary by harrowing. This fine seedbed allows seeds to be planted evenly and at a consistent depth, which is crucial for a uniform emergence of the crop.
In essence, ploughing creates a healthier soil structure that benefits both the plants and the microorganisms that live within it. This makes it an important practice for farmers seeking to optimise their crop production.
When seeds are planted in a well-prepared seedbed they have better access to water, nutrients, and air, all of which are necessary for germination and growth. In addition to improving seed-to-soil contact, ploughing also helps to remove any obstacles, such as rocks or debris that could hinder seedling growth. By creating a clean and level surface, ploughing ensures that seeds have the best possible start.
So how else does ploughing help the farmer? Let us start with one of the most significant advantages of ploughing, soil aeration. When soil is turned over by the plough, it introduces air into the soil structure. Aeration is crucial for root development and nutrient absorption, both of which are essential for healthy plant growth. Roots require oxygen to function properly and compacted soil can restrict this oxygen supply. By breaking up the soil, ploughing reduces compaction and allows roots to penetrate deeper, enabling plants to access water and nutrients more efficiently. This process also facilitates the exchange of gases in the soil, which is important for the microorganisms that contribute to nutrient cycling and soil fertility.
Moreover, ploughing helps create larger soil aggregates, which improve water infiltration and reduce runoff. In regions with heavy rainfall this can prevent waterlogging and ensure that crops have access to a steady supply of water without the risk of drowning in it. Soil aeration also plays a critical role in temperature regulation within the soil. A well-aerated soil can warm up more quickly in the spring, providing an optimal environment for seed germination and early root development. This early start can lead to stronger, more resilient plants and, ultimately, higher yields.
Weed control is another advantage of ploughing. Weeds compete with crops for essential resources such as nutrients, water, and sunlight. By ploughing, you can bury weed seeds and unwanted seedlings beneath the soil surface, reducing their ability to grow and spread. The mechanical action of the plough turns the soil over, effectively uprooting weeds and burying them deep enough that they cannot re-emerge. This is particularly beneficial for controlling perennial weeds, which can be difficult to manage through other methods. Ploughing also disrupts the life cycle of many weed species, preventing them from reaching maturity and producing seeds.
Compared to chemical herbicides, often an important part of non-till systems, ploughing offers a far more environmentally friendly approach to weed control. I never use herbicides myself, but I appreciate that herbicides can be highly effective and some farmers rely upon them especially in no-till regimes. However, their overuse can lead to herbicide-resistant weeds and potential harm to beneficial organisms in the soil. The effects upon animals (both human and other species) of such chemicals is still not fully understood. Ploughing, on the other hand, provides a simple physical solution that reduces reliance on chemicals and promotes healthier soil ecosystems.
Ploughing can help to manage weed populations over the long term. By regularly turning the soil, farmers can prevent the build up of weed seed banks in the soil, reducing the likelihood of future weed infestations and saving farmers time and money while protecting their crops from competition. For generations, ploughing has been seen as an effective method for managing weeds, offering both immediate and long-term benefits. By integrating ploughing into their weed control strategies, farmers of all types can maintain cleaner fields and improve crop yields without relying on chemical inputs.
Yet another advantage of ploughing is that it plays a vital role in the incorporation of organic matter into the soil, which is essential for maintaining soil fertility and structure. Organic matter, such as crop residues, manure, and compost, is a key component of healthy soil. When ploughed into the soil, it decomposes and releases nutrients that plants need to grow. The process of ploughing helps mix organic matter evenly throughout the soil profile, ensuring that nutrients are distributed where plant roots can access them. This not only improves nutrient availability but also enhances the soil’s physical properties. Organic matter acts as a binding agent, helping to create soil aggregates that improve soil structure and water retention. Moreover, organic matter serves as a food source for soil microorganisms. These microorganisms break down the organic material, converting it into forms that plants can use. This process, known as mineralization, is essential for maintaining a continuous supply of nutrients in the soil.
Incorporating organic matter through ploughing has long-term benefits for soil health. Over time, regular addition of organic matter can increase the soil’s organic carbon content, which improves soil fertility and resilience. Soils rich in organic matter are better able to withstand drought and erosion, making them more sustainable.
It is also true that ploughing helps to speed up the decomposition of organic matter, which can be beneficial in cooler climates where decomposition rates are slower. By incorporating organic matter into the soil, ploughing ensures that nutrients are released in time for the growing season, supporting healthy crop growth and maintaining soil health and fertility.
I was once told by an old gardener, that “the hoe is mightier than the hose.” It was his belief that “fluffing the soil” with a hoe was better than an irregular watering regime with a hose pipe. Moisture retention is another significant advantage of ploughing. In agriculture, as in gardening, maintaining adequate soil moisture is crucial for crop survival and productivity, especially in regions prone to drought or irregular rainfall. Ploughing helps improve the soil’s ability to retain moisture by creating a more porous soil structure that can absorb and hold water.
When soil is ploughed, it breaks up compacted layers and creates larger spaces between soil particles. These spaces allow water to infiltrate more easily and be stored within the soil profile. This increased infiltration reduces surface runoff, which is a common cause of water loss in agricultural fields. By minimizing runoff, ploughing ensures that more water is available to the crops.
In addition to improving water infiltration, ploughing also helps to reduce soil crusting. Soil crusting occurs when the soil surface becomes hard and compacted, preventing water from entering the soil. Ploughing breaks up these crusts or “pans,” allowing water to penetrate the soil and reach the plant roots more effectively. The effect of continuous long-term direct drilling in the UK is seen as at least partially responsible for the dramatic reduction in earthworm populations, with some estimates that over a third of the UK’s earthworms have been lost owing to soil compaction, hence the return of ploughing to favour.
Furthermore, ploughing can help mitigate the effects of drought by enhancing the soil’s waterholding capacity. Soils that are well-structured and rich in organic matter, both of which are promoted by ploughing, are better able to retain moisture during dry periods. This moisture retention is critical for sustaining crops when water availability is limited.
Yet another benefit of ploughing is as an effective method for controlling pests. In turning over the soil, ploughing disrupts the life cycles of many soil-borne pests, reducing their populations and minimizing the damage they can cause to crops by exposing them to unfavorable conditions. When soil is turned, pests that reside in the upper layers of the soil are brought to the surface. Here they are more vulnerable to predators, such as birds and insects, as well as environmental factors like sunlight and drying winds. This exposure can significantly reduce pest numbers, especially for species that rely on the soil for shelter and reproduction. Ploughing can help to bury pest eggs, larvae, and pupae, making it more difficult for them to reach the surface and continue their life cycles. By interrupting these stages of development, ploughing can help prevent pest outbreaks and protect crops from infestations.
From an environmental and sustainability standpoint, ploughing can reduce the need for chemical pesticides. By decreasing pest populations through mechanical means, farmers will need less chemical inputs, reducing the impact on the environment and non-target organisms like beneficial insects and us humans.
Ploughing will also play a crucial role in enhancing nutrient availability in the soil, which is essential for healthy plant growth. By turning over the soil, ploughing redistributes nutrients from the surface to deeper layers, making them more accessible to plant roots. When soil is left undisturbed, nutrients can become concentrated in the upper layers, where they may not be fully utilized by plants. Ploughing helps to mix these nutrients throughout the soil profile, ensuring that they are evenly distributed and available to plants at all levels. This process is particularly important for deep-rooted crops that require access to nutrients from lower in the soil. As organic material is broken down by soil microorganisms, the essential nutrients nitrogen, phosphorus and potassium are made available to plants. This increased nutrient availability supports stronger plant growth and higher crop yields.
While it is clear that ploughing offers numerous benefits, it is important to consider some of the disadvantages of the practice and the impact on the climate and on sustainability. In recent years, there has been growing concern about the effects of ploughing on soil maintenance, carbon emissions, and long-term sustainability.
Ploughing can contribute to soil erosion, particularly on sloped or vulnerable lands. When soil is disturbed, it becomes more susceptible to being washed or blown away, leading to the loss of valuable topsoil. To mitigate this many farmers are adopting conservation tillage practices, such as reduced tillage or notill farming (as previously described), their aim being to preserve soil structure and reduce erosion. Ploughing it is said, can release stored carbon from the soil into the atmosphere, contributing to greenhouse gas emissions. This has led to increased interest in practices that minimize soil disturbance and promote carbon sequestration, such as cover cropping and agroforestry.
Despite these concerns, ploughing still plays a beneficial role in sustainable agriculture when used intelligently and judiciously. By combining ploughing with other conservation practices, such as crop rotation, cover cropping, and proper soil management, farmers can still maintain the benefits of ploughing while minimizing it’s environmental impact.
Ploughing is, and will remain, a fundamental practice in agriculture, offering numerous advantages that contribute to soil health, crop growth, and overall farm productivity. From improving soil aeration and moisture retention to controlling weeds and pests, ploughing plays a crucial role in creating optimal growing conditions for crops.
Incorporating organic matter and enhancing nutrient availability through ploughing ensures that soils remain fertile and productive over the long term. While concerns about soil erosion and carbon emissions have led to the rise of conservation tillage practices, these methods are not unambiguously beneficial, and can at times cause there own set of problems. It’s clear that ploughing is once again seen as a valuable tool when used thoughtfully and in conjunction with other sustainable farming methods. Ultimately, the advantages of a plough lie in its natural ability to enhance soil quality and support healthy, resilient crops.
As I picked up the lines and told Bella to walk on, it struck me forcibly that agriculture will continue to evolve, often by trial and error as in the past; that ploughing will likely remain an important practice, adapting to meet the needs of both farmers and the environment. That 12 bottom plough certainly made easy work of that field….now how many horses would I need to pull that?
