WASSILA THAW: “What played out here during the March-April-May season we do not think that is really La Niña. But it [is] probably mostly due to the atmospheric conditions that prevailed at that time.”

Mr. Thiaw says La Niña conditions might begin again by the end of this year. And if that happens, he says, then the October-through-December rainy season could again be dryer than normal.

Climate researcher Simon Mason at Columbia University in New York says East Africa has been getting drier over about the last ten years. Mr. Mason says this is at least partly the result of global warming. Rising temperatures in the Indian Ocean create conditions that pull moisture away from East Africa.

Claudia Ringler at the International Food Policy Research Institute also points to another issue. She said by Skype that much of the land in the drought-affected areas is not very productive even in good times.

CLAUDIA RINGLER: “It will not get any better. Even if we have a bit more rainfall, the general potential for more food production is not expected to improve dramatically in the region.”

In the United States, the latest La Niña pushed moisture away from the south, causing severe droughts. Texas has suffered billions of dollars in agricultural losses. Changes in the winds pushed the rain toward northern states, causing floods.

And that’s the VOA Special English Agriculture Report, written by Jerilyn Watson and Steve Baragona. To find transcripts and MP3s of our programs, or to post comments, visit our website voaspecialenglish.com. I’m Karen Leggett.