Automation in agriculture/gardening - Drip irrigation

Given :
 Water is required by plants(roots only),
When :
 The traditional way of putting water using hose pipes
Then
  Water and energy(electricity) is wasted

Solution:
  Drip irrigate the plant roots like human circulatory system (network of pipes - remember to use T-bends at 90 degrees to avoid lag in flow).
  Reuse existing overhead tank to circulate the water into this system. (Overhead tank uses gravity. Fill this tank when sun shines using a solar powered water pump to make it self sustaining)
     -Also can add a rain water harvesting system
  Connect automatic timer on the tap to irrigate water on certain times of day/month/year
  Sow the seeds and enjoy self sustaining flower and fruit plants.
 
  Scale it to a farm!

Exceptions 
  Cost of building overhead tank (reuse existing tank or water tap)
  Clogging of pipes (needs maintenance)

Practicals
  This i will try and post in detail when in India.
 
Links:
  Drip irrigation timer only on Alibaba or ebay(buy pipes and connectors in local shop to save Rs.) :
 
 Pls leave a comment if you find it useful. That would keep me motivated :)

ॐ सर्वे भवन्तु सुखिनः
सर्वे सन्तु निरामयाः ।
सर्वे भद्राणि पश्यन्तु
मा कश्चिद्दुःखभाग्भवेत् ।
ॐ शान्तिः शान्तिः शान्तिः ॥  meaning