Search results
Results From The WOW.Com Content Network
Teff is adaptable and it can grow in various environments, at altitudes ranging from sea level to 3,200 metres (10,500 ft). [22] However, it does not tolerate frost. Highest yields are obtained when teff is grown between 1,800 to 2,100 m (5,900 to 6,900 ft), with an annual rainfall of 450 to 550 mm (18 to 22 in), and daily temperatures range ...
The fungal ancestors of stem rust have infected grasses for millions of years and wheat crops for as long as they have been grown. [7] According to Jim Peterson, professor of wheat breeding and genetics at Oregon State University, "Stem rust destroyed more than 20% of U.S. wheat crops several times between 1917 and 1935, and losses reached 9% twice in the 1950s," with the last U.S. outbreak in ...
A survey of British wheat in 2006-2008 found average levels of 0.05–0.22 mg/kg with maximum levels of 1.2 mg/kg. [ 29 ] Evidence that traces of glyphosate used on crops could make its way into a final, processed food product was raised in 2016 by a German environmental group, Munich Environmental Institute (note that this example does not ...
Spring wheat does not undergo dormancy. Wheat requires a deep soil, preferably a loam with organic matter, and available minerals including soil nitrogen, phosphorus, and potassium. An acid and peaty soil is not suitable. Wheat needs some 30 to 38 cm of rain in the growing season to form a good crop of grain. [123]
Genetically modified wheat, which "is not approved for cultivation anywhere in the world", was found in an Oregon farm in June 2013. [13] The grain was modified by Monsanto to tolerate weed killer treatments. It is not known whether the unapproved wheat is present elsewhere. [14] U.S.A geographic distribution of winter wheat production 2009.
Winter wheat is grown as a cash crop or a cover crop.Optimal growing conditions for winter wheat include high-drainage soil with medium texture. Mid-quality soil nutrient content is best for winter wheat, with an appropriate supply of nitrogen being critical for the wheat to be able to establish itself in time before winter dormancy.
The Puccinia species causing wheat leaf rust has been called by at least six different names since 1882, when G. Winter (1882) described the Puccinia rubigo-vera. [5] During this time, wheat leaf rust was interpreted as a specialized form of P. rubigo-vera. Later, Eriksson and Henning (1894) classified the fungi as P. dispersa f.sp. tritici.
Einkorn is a short variety of wild wheat, usually less than 70 centimetres (28 in) tall and is not very productive of edible seeds. [5] The principal difference between wild einkorn and cultivated einkorn is the method of seed dispersal. In the wild variety the seed head usually shatters and drops the kernels (seeds) of wheat onto the ground. [1]