Sugarcane cultivation has to compete with lucrative crops like rice and wheat.

FORBES: Magazine Article

For the first time since the 1960s the yields of the world's most important crops, wheat and rice, are rising more slowly than the global population (see special report).

ECONOMIST: The future of food

Staple crops like wheat, soy bean, rice and potato -- things that would provide carbohydrates, protein and fat -- they're the final end point.

CNN: To boldly grow where no one has grown before

It recommends they use rice and wheat straw for mulch instead of burning it, rotate their crops, use a range of different seeds, manure their fields, and so on.

ECONOMIST: Punjabis are poisoning themselves

After the second world war, dwarf varieties of wheat and rice (which overcame the problem that heavily fertilised crops in hot countries grew too tall and fell over) boosted developing-country output.

ECONOMIST: Make it cheaper, and cheaper | The

For example, in order to maintain the highest level of genetic purity, distinct varieties of self-pollinated crops such as wheat, rice, soybeans and barley need to be separated by at least 60 feet.

FORBES: Magazine Article

Over the past few years, it has convened a series of meetings that brought together leading experts for each of the main food crops, such as wheat, rice, lentils and maize.

BBC: 'Climate-proof' crop hunt begins

They predict that the world's three biggest crops in terms of calories provided - maize, rice and wheat - will decrease in many developing countries.

BBC: Bananas could replace potatoes in warming world