Organic Farming is not a difficult subject to learn. You can refer to LEISA (Checkout L Narayana Reddy). He is a organic farmer and not a consultant but you can contact him. His details are available in LEISA and he is in Karnataka.
The main thing in Organic Farming is that no chemical inputs are to be used.
You can check my blog for details related to Farm Design, Soil Improvement, Natural Fencing, Roads Design, Water Management (still more to come). All the points have been covered keeping in mind Organic Farming only and no way related to Chemical Farming.