For the first time in decades, poultry emerged as Marin County’s most valuable agricultural commodity last year, edging out organic milk production, which was battered by three years of drought. Organic milk production decreased by 25 percent, dragging down the total gross value of the county’s agricultural production to $85.3 million in 2023, a decline of 9 percent, according to the latest Marin County crop and livestock report. The gross value of Marin’s poultry rose…