Farmlands chairman Lachie Johnstone said the pair were displaying "a degree of naivety".
"The deferred expenditure makes up about $6 million of the $38 million - $32 million is still a significant amount of money," he said.
The board had tried to address the concerns of Mr Pedersen and Mr Ritchie "at considerable expense to shareholders" over the last two months, meeting with them in Hawke's Bay yesterday, shortly before the pair released their statement.
The board had voted unanimously to take the merger proposal to members subject to changes in wording demanded by the pair, he said.
"We responded accordingly, but clearly that was not enough."
He said it appeared the dissenting directors had a personal agenda.
"Charlie wasn't selected by his peers to go into representing Farmlands in the new entity and Hugh's family situation creates a dilemma - his family came out publicly against the merger before we had presented any relevant information. Given that they operate a large successful family farming business it must be challenging to have two people with opposing views, when they are both passionate people."
Mr Ritchie's father David is a former chairman of Farmlands.
"Both Hugh and Charlie have political backgrounds," Mr Johnstone said.
"I don't know about Charlie but this is Hugh's first commercial-governance role. The rest of us have been around for a fair while."
He said board members recommending the merger had extensive experience, including a bank chairman and a Landcorp director.
"We have people with experience long and deep. None of them is concerned about the process to date and these two, because they feel they have not been listened to, feel aggrieved. It is problematic."
Farmlands members would be fully informed, he said.
"The board thinks there is enough value in the transaction to present it to shareholders and let them have their say. The only thing we are trying to do is set Farmlands up for the future."