Students attend a chemistry class at Kweichow Moutai Co.'s Moutai University in Renhuai.

Students attend a chemistry class at Kweichow Moutai Co.'s Moutai University in Renhuai.

Students attend a chemistry class at Kweichow Moutai Co.'s Moutai University in Renhuai.

Urea granules, a nitrogenous compound fertiliser, lie on a dry floor beside tractor tracks where wheat will be planted. Around October, when the land is dry, many local farmers apply fertilisers, irri...

Urea granules, a nitrogenous compound fertiliser, lie on a dry floor beside tractor tracks where wheat will be planted. Around October, when the land is dry, many local farmers apply fertilisers, irri...

Irrigation water floods fertilised furrows in a field where wheat will be planted. Nitrogenous based fertilisers present their highest nitrous oxide emissions when used during the irrigation process.

Rafael Parra takes a rest from opening channels to allow water to flood fertilised furrows in a field where wheat will be planted. Nitrogenous based fertilisers present their highest nitrous oxide emi...

Rafael Parra uses a shovel to allow water to flood a fertilised furrow in a field where wheat will be planted. Nitrogenous based fertilisers present their highest nitrous oxide emissions when used dur...

Jorge Alberto Ruiz (30), Antonio Viles (40), Armando Gaxeola (21) and Carlos Antonio Gaxeola (22) eat wheat tortilla tacos and Coca Cola for lunch while they wait for more urea fertiliser to be distri...

Carlos Antonio Gaxeola (22) cooks chili and wheat tortilla tacos over am improvised grill during a lunch break while he waits for more urea fertiliser to be distributed. Carlos grew up next to the cro...

Jorge Alberto Ruiz (30) observes how urea granules fall from a local agro-industrial economic consortium's truck into a fertiliser spreader in a dry field where wheat will be planted. Around October,...

Jorge Alberto Ruiz (30) observes how urea granules fall from a local agro-industrial economic consortium's truck into a fertiliser spreader in a dry field where wheat will be planted. Around October,...

Jorge Alberto Ruiz (30) observes how urea granules fall from a local agro-industrial economic consortium's truck into a fertiliser spreader in a dry field where wheat will be planted. Around October,...

Jorge Alberto Ruiz (30) observes how urea granules fall from a local agro-industrial economic consortium's truck into a fertiliser spreader in a dry field where wheat will be planted. Around October,...

Urea granules fall from a local agro-industrial economic consortium's truck into a fertiliser spreader in a dry field where wheat will be planted. Around October, when the land is dry, many local farm...