D:-40
Correct Answer:- Option-A
Question68:-Among the following, is not an implement for secondary tillage.
A:-Cultivator
B:-Disc plough
C:-Harrow
D:-Plank and roller
Correct Answer:- Option-B
Question69:-A cropping system in which crop intensification occurs only in time dimension is
A:-Multi tier cropping
B:-Sequential cropping
C:-Relay cropping
D:-Mixed cropping
Correct Answer:- Option-B
Question70:-The 'stress hormone' which imparts drought tolerance to plant is
A:lAA
B:-ABA
C:-GA
D:-Cytokinin
Correct Answer:- Option-B

Question71:-Underground layer of porous rocks or soils saturated with water from above which yield significant amounts of
water are called

A:-aquicludes
aquifers
C:-aquitards
D:-water tables
Correct Answer:- Option-B
Question72:- is defined as the physical condition of the soil in relation to crop growth.
A:-Mellowness
:-Friability
C:-Tilth
D:-Aggregation
Correct Answer:- Option-C
Question73:-Growing of two or more crops simultaneously on the same piece of land with a definite row pattern is known as

A:-Intercropping
B:-Multiple cropping
C:-Relay cropping
D:-Polyculture
Correct Answer:- Option-A
Question74:-The Central Soil and Water Conservation Research and Training Institute is located at
A:-Dehradun
B:-Pantnagar
C:-Lucknow
D:-Hyderabad
Correct Answer:- Option-A
Question75:- law states that the flow of water through a unit cross section of soil is proportional to the gradient of
hydraulic head.
A:-Beer's
-Bernouli's

:-Liebig's
D:-Darcy's
Correct Answer:- Option-D
Question76:- is a herbicide used for weed control in zero tillage.
A:-2,4-D

B:-Oxyfluorfen
C:-Glyphosate
D:-Cyhalofop butyl
Correct Answer:- Option-C
Question77:-Overall biological advantage of intercropping is indicated when the LER is