A huge arable farm in Arizona, USA People first started to grow crops about 12,000 years ago. They discovered that certain wild plants, which produced seeds that were ground for flour to make bread, could be made to grow in fields. Crop, or arable, farming had begun. Today, huge swathes of land that were once natural grasslands or woodlands are under cultivation. Finding new land to farm is sometimes so important that tropical rainforest, desert and wetlands are turned into farmland. Even land under the sea has been claimed to find more room for crops.
In developed countries, intensive arable farming is practised: farmers use modern machines and methods to produce better crop yields—more grain from a certain size of field. This includes mechanical ploughing and planting, along with the use of chemical fertilizers and pesticides, and irrigation where rainfall is inadequate. Breeding new crops in the laboratory, often involving genetic engineering to produce types that are, for example, more resistant to pests or tolerant of drought, also improves yields.
A circular water sprinkling system in a bean field in the Mayabeque province, Cuba. Overhead irrigation, using centre-pivot or...Read More >>A circular water sprinkling system in a bean field in the Mayabeque province, Cuba. Overhead irrigation, using centre-pivot or moving sprinklers, gives a much more equal and controlled distribution of water than flooding. Crop irrigation accounts for 70% of the world's use of fresh water.
Rapeseed field near Planay, Burgundy, France. Rapeseed is known as a "break crop”, one that helps improve the yield of cereal...Read More >>Rapeseed field near Planay, Burgundy, France. Rapeseed is known as a "break crop”, one that helps improve the yield of cereal crops, especially wheat, that grown in the same fields on a rotation basis. Other important break crops include potatoes, sugar beet, peas and beans, all of which allow insects and fungal pests to die out between cereal crops.
Around 30% of the world's farmland is used for arable farming—the rest is used for planting permanent crops such as trees and vines, and for pastures and meadows.
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