British farming faces major resource challenges: energy, gas, and water are all expensive. How can they be saved, and at what cost? Most farms need to save money urgently, and checking each overhead cost in turn is usually the best way to begin. Energy use is often recorded in detail, and even the simplest heating, lighting, and electrical controls offer significant savings potential. High gas bills for heating, drying, and spare capacity in peak electrical demand create market opportunities for biogas digestion if these costs can be reduced, and boiler replacement with larger, more efficient units or heat pumps are also options. Water used and wasted on farm for cleaning and irrigation also needs careful consideration. Are there any convincing arguments to reduce gas use even without the current price spikes? Farmers use gas and oil to control frost and reduce soil moisture content before sowing, and perhaps these resources should be carefully conserved in the same way as other environmental assets.
If present usage on a specific farm can be monitored and related costs estimated, all these improvements should be financially attractive without requiring change, investment, or system restructuring plus the extra funds freed up to pay for those changes. There could be many other simple savings that actually free up time and effort for the other economic improvements that simplest need more time. Water conservation around the farm does not require change in normal routines, but nor are the simple actions that make a difference always adopted. Do any operations, particularly for irrigation, create the same problems being corrected for soil and carbon usage?
2. Energy Basics in Modern British Farms
Energy for Modern Farming
Energy generation and consumption on British farms are changing rapidly. The main sources of energy now come from fossil fuels, electricity and biogas, and the quantities vary greatly between farms. The energy used on-site costs, on sunless nights the dairy on-site is fed from the grid, and when no electric vehicle is parked in the bioelectricity station.
The main bases of electrical loads are ventilation, lighting, milk pumping and washing. The blocks of energy are commodities, and their efficiency is penalised. Costs and margins are at an all-time high; some trading records have been broken; this balance is not sustainable without changes. Electric power prices have widespread changes, and trade patterns appear to be shifting again. The digesters are made using cube technology; power, heat and gas are produced as fuel for the farm and for sale.
The capacity for energy consumption on any farm comes from the operator and its staff, business decisions and the effect of compensation. Trading exercise is reduced on farms; much depends on farming style and the way of making decisions. A large amount of energy storage in the ground population allows a lower level of planning.
3. Efficient Heating and Ventilation
Costs associated with heating and ventilation tend to escalate significantly if care isn’t taken. Major energy savings can be achieved by improving insulation and implementing simple controls as well as through careful specification and management of heating systems.
A variety of heating options may be considered, including firing with gas, electricity, heating oil, biomass, or a combination of these, using boilers, under-floor heating, or infra-red systems. Good insulation always pays dividends, especially in heated buildings that remain occupied during the winter months. Insulation improvements are easiest and cheapest to install during new-build, but simple measures, such as battening out and filling with polystyrene bead, will pay for themselves quickly in existing farms, especially in those buildings that are heated.
With winter heating costs being so critical to many farms, and with rising energy bills now being experienced on almost all farms, it pays to look for the most economical solution to providing the heat required. The heating of buildings should be designed to provide the most comfortable working environment for the periods of peak activity. Health and welfare, particularly of livestock, can be affected adversely if ventilation rates are insufficient. To prevent this, the dry-bulb temperature should not drop below 13°C in winter for poultry; 15°C for pigs; and 16°C for cattle in a dry house and 11°C in a wet house. Air-change rates should be maintained below three changes/hr in pig houses and below 7 changes/hr in poultry housed continuously. Careful management of heating levels and ventilation rates will reduce energy use.
4. Lighting and Electrical Loads
Lighting accounts for a considerable amount of electricity use on most farms. A number of technologies and practices are available to reduce both the specified wattages and patterns of use. In addition to general reductions in electrical demand, all producers should be aware of opportunities for reducing the risk of expensive unplanned electricity consumption by checking for redundant circuits and timing switches, establishing standby practices, and scheduling irrigation or other loads where possible to avoid peak times.
Key suggestions include using daylight harvesting whenever possible, selecting high-efficiency fittings, installing occupancy sensors in amenity areas, using task lighting in work areas, reducing unneeded circuits, and timing loads to avoid peak demand periods. For any production and commercial operation, it is good practice to periodically run through a checklist of all these opportunities to ensure they are either in place or scheduled into works programs. A simple method of auditing electricity use on the farm is to establish an up-to-date circuit map with current controlled supplies marked. Circuits that are redundant, unmonitored, or provide large, unexpected peak loads are then highlighted for checking and may lead to simple, low-cost demand savings.
5. On-farm Power and Renewable Options
On-farm generation includes wind, solar, biogas, and any stored energy. Solar photovoltaics are the current favoured option; grid constraints deter wind installations. Both technologies have capital costs and payback periods, especially if storage is also included.
Fully amortised, grid-connected, weather-dependent solar or wind generation reduces electricity costs to zero; substantial savings are thus possible. Whether the farm can become energy self-sufficient depends on wind and solar resource ratios, the seasonal electricity-use profile, battery storage costs, and total grid capacity in the area. Many farms have enough roof area for solar panels either alongside or above crops. Installing panels in sunny, sheltered areas maximises generation; covering shaded areas is an alternative. Installing panels that can be angled to follow the sun generates 20% more than fixed panels.
Once the capital is available and the grid limitations explored, proceeding is straightforward. Be wary of exported power tariffs not being maintained. On-site generation enabling effluent treatment or heating further reduces grid demand, capital cost, and payback period. Capital support for wind power has been cut back since other options were introduced; considerable restrictions and planning difficulties remain. Local power buy-back arrangements can also enhance the wind option.
In addition to on-farm generation, careful operation of the farm can reduce the demand placed on the grid. Measurement or estimation of all electricity use will help reveal the scale of the demand side. Reducing the demand is often even more beneficial than on-farm generation because it is at least as expensive to produce as to consume electricity, usually more expensive if no capital is required or a very high interest rate is imposed. High energy-intensity, low-occupancy, potentially-deferrable farm activities are particularly worthy of close investigation. For example, heavy-load potato storage should be designed to require no heating or cooling when the ambient temperature is close to that of the potatoes.
Indeed, a simple audit can be done using two adjacent A4 pages. Heat sources and demands and high-wattage, intermittent loads are listed on the left-hand page; low-wattage equipment with low occupancy and the potential to be controlled automatically when not in use, or heavy-load tasks that can be scheduled or formed into blocks requiring little power at any one time, are recorded on the right-hand page. Detailed consideration of the left-hand page will reveal whether it is more economical to reduce heat loss, increase efficiency, or generate heat, while the right-hand page is a checklist of appliances requiring further thought.
6. Gas Use: Boilers, Digesters, and Alternatives
Heating, drying, generating, and other activities on British farms use a lot of gas. The question is whether all that gas is really needed. Some gas/heating loads are fixed: the gas is definitely required at the moment rather than available for short periods and should therefore be planned for rather than satisfied whenever possible or, worse still, treated as a luxury. In many cases, other systems (such as heat pumps) can provide part or all of the heating energy. These gas uses should be assessed and compared in terms of relative efficiency, control complexity, and emissions. Some other uses, such as drying or some cooling and hot-water systems, have a large degree of seasonal variation and can be matched with local renewable sources (wind, solar, water).
A gas boiler is the most common heating appliance found in British agriculture today and for good reason. Gas boilers are reliable, easy to install, lower cost, and capable of high-output heating in known quantity and at any time. Digestion of organic matter generates methane gas (biogas), which can be burnt directly, in a boiler, an engine, or a turbine, or used in a fuel cell. Heat and/or electricity generated can be used on the farm and any surplus exported to the grid, with income achieved through Feed-in Tariffs (FITs) or the Renewable Obligation. Excessive acidification of the biogas can be avoided by balancing the digestion with materials containing alkalinity, such as straw or wood. An alternative is combined heat and power (CHP) with a diesel or petrol engine that runs on the biogas produced by the digester.
7. Water Management and Conservation
Water management on British farms has two main dimensions: where does the water come from and where does it go? A farming business can lose water through its supply, distribution, or use and the losses can be minimised. Water for agriculture can come off the mains, through boreholes, surface or underground abstraction licences or be harvested directly from precipitation, either as runoff or slow drainage.
Water for cleaning and livestock is often provided by the mains supply. Estimates vary, but it is possible to lose 30% or more of mains supply through leaks. In many situations, water is provided for livestock through underground supplies which do not allow the same losses. Simple checks, including inspection, metering, and a bit of common sense, should identify most losses. Time-based watering schedules are useful. For example, if it takes X hours to fill a given tank, why not do it when it is least likely to be needed? Ever-increasing requirements for irrigation mean that, wherever possible, irrigation systems should be expandable, or at least designed to fill easily in the event of a monsoon-type rainfall. Water can also be lost through poor irrigation scheduling or through poor fittings, for example, blocked nozzles or, worse still, holes in pipes which deliver water where it is not wanted.
Water management is of increasing importance to all farming operations. The summer droughts of 2003 and 2004 have put irrigation in the limelight, but water is also needed for animal drinking and washing down barns or parlours. The past summer highlighted the ease with which that water can be wasted, both through irrigation and evaporation from open surfaces. A few simple conservation measures can help reduce loss.
8. Soil and Crop Practices to Reduce Resource Use
Improving soil health and moisture capacity reduces the demand for irrigation and increases the reliability of crops under stress. Practices that can help minimise demand include the use of cover crops, retaining crop residues in situ, deeper rooting or less thirsty crop varieties, and reducing tillage depth.
Covering bare soil with a growing cover crop has multiple benefits: it reduces the potential for soil erosion; it traps and stores nutrients, and it maintains soil structure, particularly during the winter months. Combinations of cereal cover crops and high carbon legumes are particularly effective, as they can store carbon in the soil and also improve its structure by increasing the biomass and activity of soil micro-organisms.
Retaining crop residues in the field also helps maintain soil moisture. Incorporating the residues into the soil, however, can lead to greater evaporation losses from subsequent crops. Crops with deeper rooting systems are generally better able to access residual moisture stored in deeper soil layers. Using a more drought-tolerant variety, such as winter-hardy barley instead of spring malting barley, will reduce the overall demand for water. Minimising the depth to which the soil is cultivated, while still achieving effective weed control, tends to improve moisture conservation.
9. Equipment Maintenance and Best Practices
Well-maintained equipment is essential to energy-efficient farming and care, wear, and tear and calibration faults can seriously undermine savings targets. Scheduled maintenance ought to include checks on: • recalibration of field machinery (especially sprayers and fertiliser spreaders) • cleaning of heat exchangers • replacement of worn-out lagging on hot pipes, vats, and uninsulated kettles (lagging saves up to 90% of pipe heat loss) • repair of tunnels and buildings (to cut heating and pumping costs) • cleaning of cooler/ventilating fans • examination and maintenance of milking machine and refrigeration systems (prevention is more profitable than cure).
Any suspect jump in fuel use or electricity demand should trigger a fault diagnosis check; in most cases an obvious fault will be soon evident and easily rectified. If obvious fails to strike, a systematic approach is needed, focusing on: • performing a maintenance check for an expired light bulb, drain blockage, etc. • undertaking basic fault-tracing where one or two possibilities will be far more likely than others • obtaining outside help on anything that would be too time-consuming or complicated to sort out in-house.
10. Economic and Policy Considerations
The suggestions outlined earlier have costs, and these costs can come from the farm’s own resource category (e.g. covering a concrete yard to save on extracting/hiring tipper lorries) or have an investment cost where loans, aid grants or capable suppliers would be required. These costs are usually closely associated with the tariffs for the energy used. Farmers have a history as energy consumers/air polluters/land-use change-contributors and many schemes exist on the carbon market that pay them to change this. Local planning policy for new housing in the area may make the saving of water as an extra resource more rewarding and local requirements/encouragements may consider the need for more on-site energy solutions.
It is vital to meet any present, short-term and future costs and follow any provided guidelines. Adaptation of the suggestions into actual farm practice, with the consequent savings, tend to fulfil those costs and often have a much larger-than-expected financial benefit. The actions can also be organised and completed to suit the practicalities of each farm and be attempted at any time of the year. Simple regular checks recommend themselves by showing when things are starting to go wrong rather than asking for special visits. Thus the resource-saving pathway is at first just the implementation of a well set-up monitoring scheme that notes the indicators requiring simple regular checks in time to deal with any faults before they cause unnecessary inefficiencies or energy supplies become very tight.
11. Practical Farm Case Studies
Real-life examples highlight achievable resource savings—often quick, cheap, or even free
The Furse family renovated and pared back the 1940s electric lighting around their Petersfield office, replacing with occupancy sensors and compact fluorescents upstairs and heading off energy waste on their Petersfield office. The lighting overhaul garnered the response: “STUNNING. All the old stuff’s gone. Even the massive floodlight was on full-time ’til it got smashed. It’s made the place really different now.” The brighter atmosphere has improved morale—and a switch to task lighting further reduces energy use.
Michael Briscoe, leasing Patrick Cummings’s Thatcham indoor pig units, turned down the hot tops—and not just because it gave the pigs breathing space underneath. “In 2009, Energy Bills were escalating. Switching from gas to solar seemed daft, but it turned out there are certain things ya can do with electric power that make huge savings.” Pig-clearance pee-stains on walls get blasted with a hot washer every time the rooms are empty; others less often. A wood-burner via an air-heat exchanger now keeps farrowing piglets comfy, boiling water for maintaining hygiene, and saves sorting out and hauling-in the wood.
When filling Medicines Inventory Records, close checks of the consumption consumables—not just the cost—showed everything was going through the roof! Staff now help with lowering what comes-in—with herbal prevention–stimulation anyway shown to cut the use of far more expensive chemicals.
12. Conclusion
A multitude of routes are available and appear relatively easy to implement. Energy and gas use are related, so tackling one focuses attention on the other. Investors should have no trouble finding opportunities to reduce costs through bills, tax credits and energy company schemes, especially with a detailed action plan. Practical, farm-based energy audits identify, quantify and monitor options. A preliminary statement of intent and resources will satisfy the accreditation and inspection requirements of the risk framework for the gambling opportunities presented by carbon reduction schemes.
Many of the suggestions also help to conserve water directly or indirectly. Take care with publicity, especially regarding drainage or conservation measures. While savings may be real and substantial, they create a perception of offering something for nothing. Transparent, good-farming practice and maintenance are inevitably the real source of value.
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