Tillage

Question 1

What does a positive rake ange (less than 90) do to the soil?

Answer 1

• loosening
• cutting
• inverting
• smoothing

Question 2

What implements would have a positive rake angle?

Answer 2

• chisel tines
• plough shares
• bulldozer blades

Question 3

What is a sub soiler for?

Answer 3

Designed to shatter subsoil to allow roots, oxygen and water to penetrate profile

Question 4

Conditions needed to use a mole plough?

Answer 4

• topsoil needs to be dry
• subsoil needs to be clay
• no stones in the clay

Question 5

Potential problems with a subsoiler?

Answer 5

If done in wet conditions the subsoiler may act only as a square mole. It should be done wen as dry as possible

Question 6

What is the criticle level for any tine to operate?

Answer 6

6 x Width of tine
Below this level the soil squeezes into itself

Question 7

How much should you space the tines of a subsoiler with simple tines alone?

Answer 7

1.5 x depth of work

Question 8

How much should you space the tines of a subsoiler with winged tines alone?

Answer 8

2 x depth of work

Question 9

How much should you space the tines of a subsoiler with winged plus shallow tines?

Answer 9

2.5 x depth of work

Question 10

What would you use for surface incorporation?

Answer 10

Discs