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Policy Briefings

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Invisible fencing in wood pasture - A comparison of costs

Why invisible fencing?

Invisible fencing is an innovation that allows the control of cattle movement without needing physical barriers. In open areas, cattle can be fitted with a Geographical Positioning System (GPS) which will signal when a cow approaches a boundary.

Under trees in a wood pasture, due to the intermittent GPS signal, an alternative method is to bury an electric cable in the soil surface that emits a shortwave radio signal which is sensed by a transponder on a cattle collar. The transponder emits a noise as a cow approaches the boundary and, if she does not turn back, it provides an electric pulse similar to an electric fence. At Epping Forest, each collar also includes a GPS sensor which helps to locate the cattle.

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Featured Farm of the day

Wakelyns Agroforestry - a diverse organic silvoarable system in the UK

The general layout of the farm (Google Earth UK postcode IP21 5SD) is a series of 2 ha alley-cropping systems, with all production hedges aligned north-south on each side of 12m wide cropping areas. There are two coppice systems (hazel, willow), two mixed hardwood systems (ash, hornbeam, Italian alder, oak, small-leaved lime, sycamore, wild cherry, with or without apple) and two mixed fruit and nut systems. The organic crop rotation (cereals-ley-potatoes/squash-ley-cereals) runs as a single cycle around the whole farm.

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2nd EURAF Conference, 4-6 June 2014, Cottbus, Germany

Oak agro-silvo-pastoral system

Willow coppice, Netherlands

Cereal silvoarable agroforestry (South Portugal)

Silvopastoral system with Ash at Loughall, Northern Ireland

Willow silvopasture

Red Tractor Farm

Darliner Farm

Sheep grazing vineyards (Vitipasture system)

Xeromero valonia oak forest/silvopastoral system (West Greece)