| Arable Land |
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| CATEGORIES ABOUT ARABLE LAND | |
| land management | |
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In Geography , arable land (from Latin ''arare'', to Plough ) is a form of Agricultural Land Use , meaning Land that can be (and is) used for growing Crops . David Ricardo incorporated the idea of arable land into Economic Theory . Of the earth's 57 million square miles (148,000,000 km&2) of land, more than 12 million square miles (31,000,000 km&2) are arable. Most of the arable land on earth is around the largest rivers on earth. Some examples are: the Nile River, the Tigris and Euphrates Rivers, the Yellow River , the Amazon River , the Ganges and the Rhine River. These rivers flood regularly, overspilling their banks. When the flood is over, the rivers recede, leaving behind rich Silt . This silt is excellent fertilizer for Crops . Even if the land is overfarmed, and all the Nutrient s are depleted from the soil, the land renews its fertility when the next flood comes. Rivers and streams can make desert land arable. UNARABLE LAND On unarable land, farming is nearly impossible unless more advanced methods of Agriculture are used. Unarable land usually has no source of fresh water, and is often too hot (desert), too cold (arctic), too rocky, too mountainous, too salty, too rainy, too snowy, or too cloudy. Clouds block the sunlight plants need for Photosynthesis (making sunlight into food). The plants starve without light. Starvation and Nomad ism often exist on unarable land. Unarable land is sometimes called 'wastes', 'badlands', 'worthless' or 'no man's land'. Sometimes, unarable land can be turned into arable land. New arable land makes more food, and can prevent Starvation , saving lives. This also makes the country more Self-sufficient and politically independent, because the country doesn't have to buy food from other countries. Making unarable land arable often involves digging new irrigation canals and new wells, aquaducts, Desalination plants, planting trees for shade in the desert, Hydroponic s, fertilizer, nitrogen fertilizer, Pesticide s, Reverse Osmosis water processors, PET Film insulation or other insulation against heat and cold, digging ditches and hills for protection against the wind, and greenhouses with internal light and heat for protection against the cold outside and to provide light in cloudy areas. Some examples of infertile unarable land being turned into fertile '''arable''' land are:
Some examples of fertile arable land being turned into infertile '''unarable''' land are:
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