California's dry farms

A field of dead almond trees is seen during a drought in Coalinga in the Central Valley, California May 6, 2015. Almonds, a major component of farming in California, use up some 10 percent of the state's water reserves according to some estimates. REUTERS/Lucy Nicholson

A farm worker takes a break while picking table grapes in Maricopa, California, United States, July 24, 2015. California is in the fourth year of a catastrophic drought. REUTERS/Lucy Nicholson

A farm worker picks table grapes in Maricopa, California, United States, July 24, 2015. Due to the drought, some farm workers are losing days of work or working shorter hours. REUTERS/Lucy Nicholson

Children play at a migrant farm labor housing center in Bakersfield July 23, 2015. REUTERS/Lucy Nicholson

Workers pick strawberries in a field on a farm in Oxnard February 24, 2015. REUTERS/Lucy Nicholson

A farm worker picks table grapes in Maricopa July 24, 2015. REUTERS/Lucy Nicholson

A worker prunes almond trees in an orchard near Bakersfield in the Central Valley January 17, 2015. California ranks as the top farm state by annual value of agricultural products, most of which are produced in the Central Valley, the vast, fertile region stretching 450 miles (720 km) north-sound from Redding to Bakersfield. REUTERS/Lucy Nicholson

Farm worker Jose Adolfo Casares, 40, sits with his one-year-old daughter, Guadalupe, at a migrant farm labor housing center in Bakersfield July 23, 2015. REUTERS/Lucy Nicholson

Paula Isidoro, 55, dries grapes outside her home at a migrant farm labor housing center in Bakersfield July 23, 2015. REUTERS/Lucy Nicholson

A worker fixes an irrigation pipe in a cornfield at the Bowles Farming Company in Los Banos May 5, 2015. REUTERS/Lucy Nicholson

Dead almond trees are seen near Bakersfield July 23, 2015. REUTERS/Lucy Nicholson

Workers plant crops in the Central Valley near Fresno May 6, 2015. REUTERS/Lucy Nicholson

A farm worker picks table grapes in Maricopa July 24, 2015. REUTERS/Lucy Nicholson

A worker checks irrigation pipes in a cornfield at the Bowles Farming Company in Los Banos May 5, 2015. REUTERS/Lucy Nicholson

Workers pick grapes in the Central Valley May 6, 2015. REUTERS/Lucy Nicholson

A farm worker picks table grapes in Maricopa July 24, 2015. REUTERS/Lucy Nicholson

Children play soccer at a migrant farm labor housing center in Bakersfield July 23, 2015. REUTERS/Lucy Nicholson

Bob Weimer looks over a fallow field on his 1,000-acre farm that grows sweet potatoes, almonds, peaches and walnuts, near Livingston April 21, 2015. REUTERS/Robert Galbraith

Workers pick strawberries in a field on a farm in Oxnard February 24, 2015. REUTERS/Lucy Nicholson

A worker walks through farm fields in Los Banos May 5, 2015. REUTERS/Lucy Nicholson