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Justus von Liebig proved in 1840 that plants needed nitrogen, potassium and phosphorus. Liebig's law of the minimum states that a plant's growth is limited by nutrient deficiency. [5] Plant cultivation in media other than soil was used by Arnon and Stout in 1939 to show that molybdenum was essential to tomato growth. [citation needed]
A grain is a small, hard, dry fruit – with or without an attached hull layer – harvested for human or animal consumption. [1] A grain crop is a grain-producing plant. The two main types of commercial grain crops are cereals and legumes.
Sorghum bicolor, commonly called sorghum [2] (/ ˈ s ɔːr ɡ ə m /) and also known as great millet, [3] broomcorn, [4] guinea corn, [5] durra, [6] imphee, [7] jowar, [8] or milo, [9] is a species in the grass genus Sorghum cultivated for its grain. The grain is used as food by humans, while the plant is used for animal feed and ethanol ...
The usage of corn for maize started as a shortening of "Indian corn" in 18th-century North America. [22] The historian of food Betty Fussell writes in an article on the history of the word corn in North America that "[t]o say the word corn is to plunge into the tragi-farcical mistranslations of language and history". [8]
The Three Sisters planting method is featured on the reverse of the 2009 US Sacagawea dollar. [1]Agricultural history in the Americas differed from the Old World in that the Americas lacked large-seeded, easily domesticated grains (such as wheat and barley) and large domesticated animals that could be used for agricultural labor.
The agriculture sector employs around 540,000 people in Taiwan, about 5% of the total population. In 1997, there were around 780,000 farm households, in which 80% of them were part-time farm households. There are 1.1 hectares of cultivatable land per farm family. [89]
Corn kernels are the fruits of corn (called maize in many countries). Maize is a grain , and the kernels are used in cooking as a vegetable or a source of starch . The kernel comprise endosperm , germ , pericarp , and tip cap.
The US is the world's largest producer of corn. [8] According to the United States Department of Agriculture (USDA), the average U.S. yield for corn was 177 bushels per acre, up 3.3 percent over 2020 and a record high, with 16 states posting state records in output, and Iowa reporting a record of 205 bushels of corn per acre.