About 4,000 wild bee species are native to North America. Other bee species on the continent were imported from Europe to produce honey. Bees also serve as crop pollinators-carry material from one plant to another. This helps the plants produce seeds so farmers become dependent on this bee ...
Pecan is the only major nut crop native to North America; however, many important wild relative species of nut crops, including chestnut, hazelnut, pecan, pistachio, and walnut, are native to North America and are important sources of useful genes. This chapter briefly covers the history and ...
阅读理解Bees play an important part in the growth of crops.About 4, 000 wild bee species are native to NorthAmerica. Other bee species on the continent wereimported from Europe toproduce honey. Bees alsoserve as crop polinators(授粉者).These pollinatorscarry material from oneplant to another...
, along with other warm-season grasses, is native to the precolonial tallgrass prairie in North America and is identified as an alternative energy crop for cellulosic feedstocks. This article describes a phenology-based geospatial approach to mapping the geographic distribution of this perennial ...
cacti, native to north and south America and the West Indiescacti, serving as agricultural and industrial crops - and as animal feed, vegetables and fruitssalinity stress, two major components - water stress and ion toxicitycacti as animal feed...
Corn is even partly responsible forthe survival of early settles in North America. But for allits usefulness, corn—a member of the grass family-wasonce considered little more than a weed.Unlike today's corn plants, which produce ears up to afoot long, the ancestor of the modern cornstalk(...
In North America it is grown as a fallow crop and the leaves can be used as animal fodder. Daikon Read More » Jerusalem artichoke Crops, Vegetables Jerusalem artichoke is related to the sunflower. It originates from eastern North America and is grown in temperate climates for its tubers...
2. What happens to the good parts of wormy apples? A. They are thrown away. B. They are made into apple juice. C. They are sold to customers. D. They are fed to the chickens. 3. What does the author learn from his friend? A. Apples are not native to North America. B. Other...
Sustained by First Nations: European newcomers' use of Indigenous plant foods in temperate North America Indigenous Peoples of North America have collectively used approximately 1800 different native species of plants, algae, lichensand fungi as food. When Eur... NJ Turner,PV Aderkas - 《Acta Soci...
Highbush blueberry (L.) is a native North American crop dependent upon pollen movement by bees for high fruit set and large berries. Commercial blueberry f... JK Tuell,JS Ascher,I Rufus - 《Annals of the Entomological Society of America》 被引量: 588发表: 2009年 加载更多来源...