crop

• corp: corporal 或 corporation的缩写。
• crop [Origin: cropp 'bird's crop, top part of a plant'] 所以有“平头”、“剪成平头”的意思。
  • A cash crop is a crop that is grown in order to be sold.
  • A subsistence crop is a crop that people grow to use or eat themselves in order to keep alive, rather than to sell for profit.

Crops | National Geographic Society [会; 社; 团体]

A crop is a plant or plant product that can be grown and harvested for profit or subsistence. By use, crops fall into six categories: food crops, feed crops, fiber crops, oil crops, ornamental crops, and industrial crops.

Food crops, such as fruit and vegetables, are harvested for human consumption. Grains, such as corn, wheat, and rice, are the world’s most popular food crops.

Food crops were the first crops to be harvested through agriculture. Agricultural development and the growth of civilizations led to the diversity of other types of crops.

Feed crops, such as oats and alfalfa [苜蓿], are harvested for livestock consumption. These crops contain nutrients that animals need to develop. They are grown in agricultural fields but can also be found in natural meadows and pastures.

Forage [饲料] crops are important for livestock farming. Animals feed directly on forages, such as grasses. Forages that are cut and fed to livestock while they are still fresh are called green chop. Alfalfa is a popular crop fed to livestock as green chop.

Fiber crops, such as cotton and hemp, are harvested for textile and paper products. Textiles, or cloth, are made from the dried and processed fibers of certain plants. Most fibers used to make textiles are taken from the stem or roots of plants such as flax. Flax is used to make linen.

Oil crops, such as canola [芥花籽; 油菜籽] and corn, are harvested for consumption or industrial uses. Technologies developed in the past century have enabled crops to be processed and broken down into their primary components, including oil. Soybeans, for example, represented 61 percent of world oilseed production and 79 percent of all edible oil consumed in the United States in 2000.

Ornamental crops, such as dogwood and azalea, are harvested for landscape gardening. Ornamental crops are most often grown in nurseries, where they are purchased for residential or commercial settings.

Industrial crops, such as rubber and tobacco, are harvested for their products’ use in factories or machines. Industrial crops include all crops used in the production of industrial goods, such as fiber and fuel products.

The heavy reliance on chemicals has disturbed the natural environment. 橙剂

Genetically modified organisms (GMOs or GM foods) are common throughout the developed world. Critics argue that GM foods have less nutritional value and decrease biodiversity. Organic and free-range food industries have grown in opposition to industrial farming.

转基因大豆可以抵抗杀草剂——草甘膦（毒滴混剂）。草甘膦会把普通大豆植株与杂草一起杀死。

In order to preserve biodiversity, seed banks have been created around the world to store seed samples. Seed banks may specialize in a specific crop or in the crops of a region. The International Potato Center, based in Lima, Peru, houses 150 wild potato species and other tubers of Andean origin.

The Svalbard Global Seed Vault, the world’s most diverse seed bank, was established in 2008. The Norwegian government built the Seed Vault into the side of a permafrost-covered mountain on the island of Spitsbergen, part of the Svalbard archipelago about 1,030 kilometers (620 miles) from the North Pole.

六级/考研单词: corporal, subsistence, harvest, fibre, ornament, vegetation, grain, wheat, diverse, livestock, meadow, pasture, chop, cotton, textile, stem, linen, component, edible, consume, unite, seldom, nursery, rubber, tobacco, disturb, modify, organism, nutrition, decrease, globe

标签：livestock,crops,crop,harvested,world,such
来源： https://www.cnblogs.com/funwithwords/p/16626372.html