Green Options

Uganda’s Agriculture Minister said that she regretted the fact that Ugandan citizens are still dying of hunger in a country that has enough crops to export to other parts of Africa. New national laws may be imposed that require every household to grow its own root crops such as cassava and sweet potatoes.

Editor’s Note: I was in Houston, TX, last week, celebrating the International Year of the Planet at the first ever joint meeting between the American societies of Soil Science, Geology, Crop Science and Agronomy. With a significant focus on biofuels, this conference was rife with interesting materials.

The Challenge: Find biofuel crops that are “pro-poor.”

One Answer: Crops that can be grown with limited resources by small-scale farmers, can be converted to biofuel with existing cheap technology, and can simultaneously provide food, fuel, and livestock feed.

In my last post I discussed how agriculture could regain its rightful place as the keystone of civilization due to the rise of biofuels over the next 30 years or so. But, in what seems a ridiculously colossal conundrum, hundreds of millions of impoverished people worldwide could face starvation due to competition of fuel land with food land.

According to the US Department of Agriculture,  recent experiments show that sweet potatoes and tropical cassava yield two to three times as much carbohydrate for ethanol production as field corn. Sweet potatoes and cassava also require significantly less fertilizer and pesticide than corn.

The experiments are unique in that all three crops were grown at the same time in two different areas of the country.

But sweet potatoes and cassava are not without disadvantages.