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Work done by pipe A in 1 minute = 1/12 Work done by pipe B in 1 minute = 1/15 Work done by pipe C in 1 minute = -1/10 Net work done in 1 minute = (1/12 + 1/15 - 1/10) = 3/60 Time taken to fill the tank = 1 ÷ 1/20 = 20 minutes Correct answer: c) 20 minutes
Immediate and ultimate source of nitrogen is
Vegetatively propagated crops are usually:
The average land holding of a marginal farmer in India is
Which one of the following is a micro-nutrients in plants?
‘Murrah’ is a popular breed of
The term to refer a shoot with a different colour flower or leaf that may arise in a group of plants is
Cut or excised leaves remain green for long if induced to root or dipped in_____
Green manure crop suitable for alkaline and water logged soil is
Which fertilizer has 2 primary essential nutrients?
A vertical marketing system is: