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In the early 1900s there were few fungicides available to treat the rust, which threatened the American lumber industry. [5] In response to concerns the federal government banned the cultivation, sale and transport of blackcurrants in 1911 and funded a program of eradication by chemical spraying, later often carried out by members of the ...
The blackcurrant requires a number of essential nutrients to thrive; nitrogen provides strong plant growth and stimulates the production of flower sprigs; phosphorus aids growth, the setting of fruit and crop yield; potassium promotes growth of individual shoots and increases the weight of individual fruits; magnesium is a constituent of ...
Removal of Ribes used to be practiced in full force, which heavily affected blackcurrant production in the United States, however through a combination of the pathogen's hardiness and ability to travel airborne for nine hundred feet, as well as the Ribes ability to regrow from an extremely small root portion, researchers have focused their ...
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Most farms were geared toward subsistence production for family use. The rapid growth of population and the expansion of the frontier opened up large numbers of new farms, and clearing the land was a major preoccupation of farmers. After 1800, cotton became the chief crop in southern plantations, and the chief American export.
The cotton industry in the United States hit a crisis in the early 1920s. Cotton and tobacco prices collapsed in 1920 following overproduction and the boll weevil pest wiped out the sea island cotton crop in 1921. Annual production slumped from 1,365,000 bales in the 1910s to 801,000 in the 1920s. [23]
The Neolithic founder crops (or primary domesticates) are the eight plant species that were domesticated by early Holocene (Pre-Pottery Neolithic A and Pre-Pottery Neolithic B) farming communities in the Fertile Crescent region of southwest Asia, and which formed the basis of systematic agriculture in the Middle East, North Africa, India ...
But US iron and steel production dropped drastically during the recession of the late 1970s and early 1980s. From a combined iron and steel production of 203 million tons in 1979, US output fell almost in half, to 107 million tons in 1982. Some steel companies declared bankruptcy, and many permanently closed steelmaking plants.