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791.

An implement that is used in till plant system is:

A.	Ridger	B.	Sweeps
C.	Furrower	D.	All are correct

792.

The purpose of ploughing is:

A.	To improve soil aeration	B.	To prevent soil erosion
C.	To add fertility to soil	D.	All are correct

793.

No till system reduces runoff by:

A.	25%	B.	50%
C.	7%	D.	90%

794.

The conservation of moisture is not possible when working with:

A.	Chisel plough	B.	Sub surface
C.	MB plough	D.	None of these

795.

The uneven fields are left when working with:

A.	Chisel plough	B.	Rotary plough
C.	MB plough	D.	None of these

796.

Area covered per day of 8 hours by 4 bottoms, 35 cm tractor plough if the speed of ploughing is 6 Km/h is:

A.	626 m3	B.	6.26 ha
C.	62.6 m3	D.	62.6 ha

797.

The purpose of harrowing is to:

A.	Pulverize soil	B.	Destroy weeds
C.	Break clods	D.	All are correct

798.

A vertical plate that is used to control depth and adjust line of pull in plough is:

A.	Vertical suction	B.	Vertical clevis
C.	Horizontal suction	D.	Horizontal clevis

799.

A device that is used to adjust the lateral movement of plough is:

A.	Vertical suction	B.	Vertical clevis
C.	Horizontal suction	D.	Horizontal clevis

800.

A draft required to pull 4-botton 30 cm tractor plough working to a depth of 15 cm operated at speed of 6 Km/h. The soil resistance is 0.7 kg/cm2:

A.	12.6 kg	B.	126 kg
C.	1260 kg	D.	None of these