Doubt: Liters per hour for drip irrigation

Hi Gurus,

We are planning to install drip irrigation in our 9 acre farm.

The plan is to cultivate vegetables such as ridge gourd, bitter gourd, brinjal, bhendi, bottle gourd etc.

My doubts are as follows:

  1. What should be the lateral spacing (1.2M or 0.9M)?
  2. What should be dripper spacing (0.4M or 0.5M)?
  3. What is the ideal liters per hour?
  4. Or can we go along without drip irrigation?

Thanks in advance for the help.