Farms subject to the highest taxes switched to alternative crops.

"We've worked with a number of alternative crops, and this is the most promising we've found so far."

But, he said, alternative crops sometimes take too long to show a return, meaning that aid is needed - to people and governments.

Carver's work on peanuts was intended to provide an alternative crop.

At his experiment station, Carver worked to develop new uses for those alternative crops.

We also propose that alternative crops and the existence of other options be investigated.

Of course in a drought the farmers cannot grow alternative crops.

These offer farmers in many regions great potential for viable alternative crops while, at the same time, having a positive effect on the environment.

In order not to increase unemployment, the growers should be offered alternative crops and support to develop them.

And these people cannot move elsewhere or turn to alternative crops.