Cheryl-Samantha Owen / Lynn Ballagh closing gate on his cattle ranch, Sandhills of Nebraska, Garfield County, Nebraska, USA.

Pete Oxford / Tea picker, collecting Tea leaves (Camelia sinensis) wearing large straw hat, Assam, North East India, October 2014.

Pete Oxford / Woman with basket on her head picking tea (Camellia sinensis), Assam, North East India, October 2014.

Steve O. Taylor (GHF) / Rice farmers pounding freshly harvested rice, Port Loko district, Sierra Leone, 2004-2005.

Merryn Thomas,Merryn Thomas / Tractor driving through Grape vines (Vitis vinifera), Knightor Winery vineyard, Roseland Peninusla, Cornwall, England, August 2012.

Pete Oxford / Chagras or cowboys on an overnight ride at a hacienda during the annual cattle round-up, with Mt Antisana in the background, Ecuador

Pete Oxford / Chagra cowboys herding cattle and burning the hillsides to keep cattle on the move and rejuvenate the pasture at a hacienda during the annual overnight cattle round-up, Andes Mountains, Ecuador

Pete Oxford / Two Chagra cowboys on an overnight ride at a hacienda to herd cattle, Andes Mountains, Ecuador

Heather Angel / Chinese farmer wearing traditional bamboo hat ploughing flooded Rice (Oryza sativa) paddy with Water buffalo (Bubalus bubalis). Xingping, Nr Guilin, Guangxi Zhuang Autonomous Region, China. October 19...

David Woodfall / Crofters managing Balranald Nature Reserve by grazing Beef cattle. Farmer distributing hay for cattle. North Uist, Scotland, UK, June.

Axel Gomille / Farmer with sheep dogs which guard the herd from wolves. Saxony, Germany, June 2015.

Magnus Lundgren / Wild Wonders of China / Farmer with two cows in background. Stone village in Wuliangshan Nature Reserve, Jingdong, Yunnan Province, China. October 2017.