Question: How much land in the country of the person who could describe the process of evaporation is good for farming?

with the introduction of the blast furnace to europe in the middle ages, pig iron was able to be produced in much higher volumes than wrought iron. because pig iron could be melted, people began to develop processes of reducing the carbon in the liquid pig iron to create steel. puddling was introduced during the 1700s, where molten pig iron was stirred while exposed to the air, to remove the carbon by oxidation. in 1858, sir henry bessemer developed a process of steel-making by blowing hot air through liquid pig iron to reduce the carbon content. the bessemer process was able to produce the first large scale manufacture of steel. once the bessemer process began to gain widespread use, other alloys of steel began to follow. mangalloy, an alloy of steel and manganese exhibiting extreme hardness and toughness, was one of the first alloy steels, and was created by robert hadfield in 1882. <SEP> Wang Chong (; 27 – c. 100 AD), courtesy name Zhongren (仲任), was a Chinese meteorologist, astronomer, and philosopher active during the Han Dynasty. This book contained many theories involving early sciences of astronomy and meteorology, and Wang Chong was even the first in Chinese history to mention the use of the square-pallet chain pump, which became common in irrigation and public works in China thereafter. He developed a rational, secular, naturalistic and mechanistic account of the world and of human beings and gave a materialistic explanation of the origin of the universe. His main work was the "Lunheng" (論衡, "Critical Essays"). Wang also accurately described the process of the water cycle. <SEP> Han-era astronomers adopted a geocentric model of the universe, theorizing that it was shaped like a sphere surrounding the earth in the center. They assumed that the Sun, Moon, and planets were spherical and not disc-shaped. They also thought that the illumination of the Moon and planets was caused by sunlight, that lunar eclipses occurred when the Earth obstructed sunlight falling onto the Moon, and that a solar eclipse occurred when the Moon obstructed sunlight from reaching the Earth. Although others disagreed with his model, Wang Chong accurately described the water cycle of the evaporation of water into clouds. <SEP> China's arable land, which represents 10% of the total arable land in the world, supports over 20% of the world's population. Of this approximately 1.4 million square kilometers of arable land, only about 1.2% (116,580 square kilometers) permanently supports crops and 525,800 square kilometers are irrigated. The land is divided into approximately 200 million households, with an average land allocation of just 0.65 hectares (1.6 acres). Although China's agricultural output is the largest in the world, only about 15% of its total land area can be cultivated. <SEP> cornwallis is a rural municipality located in the canadian province of manitoba. it surrounds the east, south and west sides of brandon, manitoba. most of the land comprising the municipality is farmland, but it contains a few settlements. one of the larger settlements, sprucewoods, sits at the north gate of canadian forces base shilo and contains a large group of the municipal population. in the past, there has been friction between the community and the farming base that make up much of cornwallis.