61.
Milpa system of Central America is a modified form of

62.
Heavy applications of potassium fertilizers often lead to reduced absorption of

63.
Number of essential mineral nutrients for plants

64.
Disk Plough is a

65.
Origin of groundnut was

66.
Pusa-9 variety of arhar mature in

67.
% of impurity in a seed sample is termed as

68.
Which of the following is semi tolerant crop of salinity?

69.
Find the Rice equivalent yield of a system where, Rice yield = 6 t/ha, wheat yield 40 q/ha, price of rice Rs. 30,000/ton and price of wheat is Rs. 2,000/qt.

70.
Fruit of Mustard is known as

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