Healthy and mature farming system (2-7)

I believe the answer is:

no-tillage

I'm a little stuck... Click here to teach me more about this clue!

'farming system' is the definition.
The definition suggests a singular noun which matches the answer.

'healthy and mature' is the wordplay.
I cannot really see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is located in the answer.
'mature' could be 'age' (synonyms) and 'age' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

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