Who developed the idea of Crop rotation?
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The 18th Asian Games also known as 'Asiad' will be held in 2018 in
If sinθ+ cosecθ=2, then the value of sin-7∅+cosec7∅ is
Which of the following is called the Land of White Elephants?
The Indian musical instrument 'Surbahar' is of which type?
Growing agricultural crops between rows of planted trees is known as
Which is used as an Air pollution indicator?
Ornithophily is effected by