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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 ...
Farming was the primary occupation of 72% of the national labor force in 1820, 60% in 1860, 37% in 1900, and 26% in 1920. The 50% level came in 1877. [8] [9] In 1900 29.1 million Americans were gainfully employed, of whom 10.4 million were on farms.
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The number of farms tripled from 2.0 million in 1860 to 6.0 million in 1906. The number of people living on farms grew from about 10 million in 1860 to 22 million in 1880 to 31 million in 1905. The value of farms soared from $8 billion in 1860 to $30 billion in 1906. [22] [23]
The United States Emancipation Proclamation came into power on January 1, 1863, allowing a "new journey for people of African ancestry to participate in the U.S. Agriculture Industry in a new way." [14] Sharecropping became widespread in the South during and after the Reconstruction Era. [15] [16]
Records from the Warring States, Qin dynasty, and Han dynasty provide a picture of early Chinese agriculture from the 5th century BC to 2nd century AD which included a nationwide granary system and widespread use of sericulture. An important early Chinese book on agriculture is the Qimin Yaoshu of AD 535, written by Jia Sixie. [88]