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.

Roy Mangersnes / Man gathering crop of Coca (Erythroxylum coca) leaves using a net, the leaves are harvested six times a year, Bolivia, November. No release available.

Chris Gomersall / 2020VISION / A farmer lifting wheat grain into his hands for inspection in the grain store at Hope Farm RSPB reserve, Cambridgeshire, England, UK, August

Gary K. Smith / Domestic sheep (Ovis aries) being moved from pen at livestock market after auction, Hawes Mart, Yorkshire, UK, September 2011

Florian Möllers / Chinese farmers 'separating the wheat from the chaff', here with yellow peas (Pisum sativum). Zhouzhi Nature Reserve, Shaanxi, China, October 2006.

Ernie Janes / Combine harvester harvesting field of Wheat, Bedfordshire, UK, August 2006

Ernie Janes / Farmer changing plough shears on plough, Hertfordshire, UK

Juergen Freund / Aerial view of a seaweed farmer tending his crop, growing agar-agar for processing into carageenan (gelatinous extracts used as binder for food or product) Philippines, May 2009.