limiting factors

Question 1

What can these be?

Answer 1

= PH
= temperature
= light intensity
= co2
=

Question 2

What do agricultural practices do?

Answer 2

= remove limiting factors
= artifical light
= heating
= burn fuels to provide co2
=

Question 3

What are the profit ascpect?

Answer 3

= cost for heating, fuel and lighting, a cost effective is implace, whatever is being paid have to get more profit because of it