land is irrigated by a river . find value of cotton produced if the usher given is Rs. 9786.5
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Answer:
The majority of U.S. cotton (about 65%) is currently produced under non-irrigated conditions. In the South and the Southeast, non-irrigated cotton systems dominate, while in the arid West nearly all of the crop water requirements are met by irrigation water. With rising production costs and the devastating effect of drought on yield, adopting irrigation to supplement rainfall in the humid areas, and improving irrigation water management in the drier areas, is becoming increasingly essential to stay competitive.
Irrigation has economic benefits to the producer by increasing yield per unit land area, and benefits to society by providing a consistent and dependable source of food and fiber. Irrigation offers safeguards against poor crop performance and/or failure due to insufficient and/or untimely rainfall. Safeguarding against rainfall uncertainties is highly desirable in today’s competitive markets where substantial investment has been committed at cotton planting time. Irrigation also facilitates agro-chemical management through the use of fertigation and chemigation practices.
Irrigation Stabilizes and Boosts Yield
It is estimated that approximately 70% of the world’s fresh water consumption is for irrigation (all crops, not just cotton), and for good reasons. Irrigation can boost yield as well as stabilize yield and quality by ensuring adequate soil water during the entire growing season or at least during critical growth stages in areas where water resources are limited. In the sandy Coastal Plain soils in the Southeast, irrigation has been shown to nearly double the non-irrigated cotton yield from about 750 to near 1,200 to 1,500 lbs. of lint per acre during water limited years. These large differences in yield are mainly because irrigation supplements rainfall, ensuring adequate water in the root zone to meet crop water needs on a consistent basis. The lower non-irrigated yields are mostly due to insufficient soil water during the season, even though yearly rainfall in the humid parts of the Cotton Belt is about 45-55 inches, or almost twice as large as the seasonal cotton water use.