Glensaugh Agroforestry Site

Glensaugh National Network Site

Glensaugh (56^o54'N 02^o33'E) is an upland site at 250m a.s.l..
Three-year mean monthly minimum, maximum and mean temperatures are 2.4, 17.4 and 9.1 ^o Celsius respectively.
Three-year mean annual precipitation is 1050mm.
The site is on a free draining cultivated brown forest soil on sandy to fine sandy loam.
The ryegrass-dominated permanent pastures are between 15 and 25 years old.

There are three tree species planted at a number of densities in separate plots (marked x in the table)

The 2500 trees/ha treatments are Farm Woodland Controls with no grazing.
There is a sheep-grazed Agricultural Control which has no trees.
The silvopastoral treatments are sheep grazed, trees are individually protected.
There are three replicates of all treatments and controls.
Grazed plots are either 0.72ha or 0.80ha in area.
Farm Woodland Controls are a minimum of 0.10ha in area.
On this site, trees are planted in rows oriented North-South on all plots.
Greyface ewes (average mature live weight 76kg) are mated to Suffolk rams.
The Greyface has an average prolificacy of 1.9 lambs born per ewe.
Mating commences in mid-October when ewes are removed from the experimental plots.
Ewes are off-wintered on silage with the addition of concentrates in late pregnancy.
Lambing takes place in a lambing shed.
Grazing on the experimental plots commences immediately after lambing, commencing in early April.
Lambs are weaned in mid-July.

Data collection conforms with National Network standards.

Site management conforms with National Network protocols.

For more information on the Glensaugh experiment, contact Alan Sibbald or Max Hislop