KWALKWALAWA, Nigeria — After two decades of working his farm in northwestern Nigeria, Umaru Muazu now struggles to find water for his crops.
A murky puddle is all that remains of a river near his 5-hectare farm and those of others in this community in arid Sokoto state. Because the 62-year-old Muazu can't afford to dig a well to keep crops like millet and maize from withering, he might abandon farming.
''Before, with a small farm, you could get a lot," he said.
Climate change is challenging agriculture in Nigeria, Africa's most populous country. With long dry spells and extreme heat, water bodies are drying because the arid season is becoming longer than usual. The wet season, though it can dump excessive rain, is short.
It's fresh pain in a country where the World Food Program says 31 million people already face food insecurity. Efforts to recover from one climate shock are overlapped by the next, said WFP spokesperson Chi Lael.
The challenges faced by farmers in the north, who account for most of what Nigeria eats, are affecting food prices and availability in the booming coastal south that's home to the megacity of Lagos.
More than 80% of Nigeria's farmers are smallholder farmers, who account for 90% of the country's annual agricultural production. Some work their fields with little more than a piece of roughly carved wood and their bare hands.
Farmers are facing low yields because the government has failed to develop infrastructure like dams to help mitigate the effects of climate change, said Daniel Obiora, national president of the All Farmers Association of Nigeria.