Ireland, County Offaly, Lough Boora Discovery Park, section known as the Black Forest in evening light, remains of black oak trees 5000 years old.

Ireland, County Offaly, Lough Boora Discovery Park, section known as the Black Forest in evening light, remains of black oak trees 5000 years old.

England, Cumbria, Lake District, The Money Tree in woodland at Aira Force, near Glenridding.

Oak, Quercus robur, Acorns growing on the branches of tree in late summer.

England, Gloucestershire, Trees, English Oak, Quercus robur. Single, ancient tree with twisted branches in exposed area subjected to flooding by the River Severn.

England, Wiltshire, Bales of hay in a field.

England, Wiltshire, Bales of hay in a field.

Sacred oak tree of Estonia considered a national symbol.

Ireland, County Offaly, Lough Boora Discovery Park, section known as the Black Forest in evening light, remains of black oak trees 5000 years old.

Ireland, County Offaly, Lough Boora Discovery Park, section known as the Black Forest in evening light, remains of black oak trees 5000 years old.

England, Cumbria, Lake District, The Money Tree in woodland at Aira Force, near Glenridding.

Oak, Quercus robur, Acorns growing on the branches of tree in late summer.

England, Gloucestershire, Trees, English Oak, Quercus robur. Single, ancient tree with twisted branches in exposed area subjected to flooding by the River Severn.

England, Wiltshire, Bales of hay in a field.

England, Wiltshire, Bales of hay in a field.

Sacred oak tree of Estonia considered a national symbol.

Ireland, County Offaly, Lough Boora Discovery Park, section known as the Black Forest in evening light, remains of black oak trees 5000 years old.

Ireland, County Offaly, Lough Boora Discovery Park, section known as the Black Forest in evening light, remains of black oak trees 5000 years old.

England, Cumbria, Lake District, The Money Tree in woodland at Aira Force, near Glenridding.

Oak, Quercus robur, Acorns growing on the branches of tree in late summer.

England, Gloucestershire, Trees, English Oak, Quercus robur. Single, ancient tree with twisted branches in exposed area subjected to flooding by the River Severn.

England, Wiltshire, Bales of hay in a field.

England, Wiltshire, Bales of hay in a field.

Sacred oak tree of Estonia considered a national symbol.

Team of donkeys used to thresh harvested wheat.

Farm workers sifting wheat

Field of ripe wheat.

Woman reaping wheat below Mount Yulong near Tibet

Wheat fields in evening sunlight

Small copse of tall Poplar trees on hill above green wheat with poppies