Orchardist Brett Guthrey's calls come after farmers and representatives from the NSW Farmers' Association and AGL met in Cobbitty last week for an information forum on coal seam gas mining.

Mr Guthrey said the association wanted mining legislation changed to reflect four key points: the need for a statewide strategic plan to identify areas of agricultural significance; enforced aquifer protection; an independent monitoring system; and adequate compensation and just contract terms for farmers.

He said there was concern that if a farmer signed a contract with AGL to receive compensation for any loss of water resources due to mining, any neighbours also affected may be put out of business.

AGL Camden Gas Project manager Adam Lollback said the company was committed to working with groups such as the NSW Farmers' Association.

Mr Lollback said the next phase of the project was the proposed northern expansion: 12 wells over 38 square kilometres.

"The Camden gas project now supplies up to 6 per cent of the NSW gas market, making it a very important project in a state which has to import more than 90 per cent of its gas needs from other states."

State Resources and Energy Minister Chris Hartcher said he was aware of an immediate need to strengthen the assessment of coal seam gas extraction impacts on agricultural land and water resources and the government would consult with all key people involved.