Keyline Vermont offers contract subsoil plowing services, using a three shank Yeomans Keyline plow direct from Australia. 
For nearly 40 years, Yeomans Plow Co. has been designing and producing what are known by some to be the ‘Rolls Royce’ of subsoil plows. Their machines have been used extensively throughout Australia to decompact and aerate degraded soils, improve soil moisture holding capability, and create a more hospitable environment for soil microbiology - the true soil builders. Numerous subsoiling implements already exist - so what makes the Yeomans plow standout?
For nearly 40 years, Yeomans Plow Co. has been designing and producing what are known by some to be the ‘Rolls Royce’ of subsoil plows. Their machines have been used extensively throughout Australia to decompact and aerate degraded soils, improve soil moisture holding capability, and create a more hospitable environment for soil microbiology - the true soil builders. Numerous subsoiling implements already exist - so what makes the Yeomans plow standout?-
Narrow shank profile - Yeomans cast iron shanks are 3/4” thick which means less soil mixing and disturbance -
Low cutting angle - the foot of the Yeomans shank rests at a 25° angle, again minimizing surface disturbance & mixing
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Seed box attachments - Our Yeomans plow comes fitted with seed boxes directly over each shank so it’s simple to plant directly into the rips as you go, reducing weed pressure and providing an ideal soil environment for crops.
‘The Soil Maker Supreme’
In his pioneering work and research during the 60s and 70s, P.A. Yeomans found that subsoil tillage coupled with well-timed pasture management could result in the rapid transformation of degraded subsoils into healthy, living topsoil. 
In fact, it’s not uncommon to hear results of 12-18” of topsoil development in as little as three years. What’s important to note here is that subsoil plowing, while a critical component of the soil building process, is only one half of the procedure. Just as critical is the subsequent management of the land - and current research reveals that the optimal management strategy for rapid soil building is management intensive/holistic high density grazing as plants reach optimal vegetative growth. While mowing has also been found to produce similar results, the rapid nutrient cycling and animal impact of high density grazing is currently the most effective way to unlock the benefits of ‘the Soil Maker Supreme’. Keyline Vermont works with expert grazing consultants who can provide advice on paddock and fence layouts, stocking density, timing and more.
In fact, it’s not uncommon to hear results of 12-18” of topsoil development in as little as three years. What’s important to note here is that subsoil plowing, while a critical component of the soil building process, is only one half of the procedure. Just as critical is the subsequent management of the land - and current research reveals that the optimal management strategy for rapid soil building is management intensive/holistic high density grazing as plants reach optimal vegetative growth. While mowing has also been found to produce similar results, the rapid nutrient cycling and animal impact of high density grazing is currently the most effective way to unlock the benefits of ‘the Soil Maker Supreme’. Keyline Vermont works with expert grazing consultants who can provide advice on paddock and fence layouts, stocking density, timing and more. Our ‘Fertility-Injection’ System
Mounted directly behind each 22” shank on our Yeomans Keyline plow is a seedbox that enables us to drop seed directly into the rips created by the shanks. Whether it’s a pasture grass or legume to boost feed value, a taprooted dynamic accumulator to mine fertility and build soil or a secondary crop maximizing the use of your field, this system provides a simple and effective means of making use of the friable planing bed the plow creates.
Additionally, we’re in the process of developing a liquid feed injection system. This simple tractor mounted system makes it possible to literally pour fertility directly into the subsoil rips via 1/8” tubing mounted behind the shanks. Liquid fertilizer amendment options include compost tea, sea minerals, skim milk and more. This simple system allows you to get even more out of each pass.
Keyline Pattern Cultivation
Keyline Pattern Cultivation refers to the application of natural patterning to the layout of fields, paddocks, fencing and treelines. 
This strategy employs a slightly off-contour approach, which, when coupled with keyline subsoil plowing, can effectively more evenly distribute water across the landscape - draining valleys and humidifying ridges. Contour layouts are recognized as providing a more natural, erosion-resistant land-use pattern, but generally result in uneven spacing of fencelines and field edges. Once the ‘keyline’ in the landscape has been established, all subsequent layout follows parallel, thus providing a much more management-friendly system. Keyline Vermont is happy to discuss the benefits and appropriateness of keyline patterning on your property.
This strategy employs a slightly off-contour approach, which, when coupled with keyline subsoil plowing, can effectively more evenly distribute water across the landscape - draining valleys and humidifying ridges. Contour layouts are recognized as providing a more natural, erosion-resistant land-use pattern, but generally result in uneven spacing of fencelines and field edges. Once the ‘keyline’ in the landscape has been established, all subsequent layout follows parallel, thus providing a much more management-friendly system. Keyline Vermont is happy to discuss the benefits and appropriateness of keyline patterning on your property.
Keyline Subsoil Plowing
Photo and layout courtesy of Darren Doherty - permaculture.biz