While the majority of carrots are cultivated in California, recent droughts and water use restrictions may impact the success of future crops. Even in states such as Wisconsin, where water is more abundant, crops must overcome fluctuating soil moisture regimes due to differences in soil drainage, water-holding capacity, and microclimate conditions. Organic vegetable crops can also be challenged by more slowly available soil nutrients, especially in newly organic land.
A major challenge for organic farmers lies in determining the right amount of nitrogen (N) to add to crops and the best time to do it. Farmers using organic nitrogen fertilizers such as manure and compost face serious limitations because these fertilizers, which often come from off the farm, are low in N content, often hauled long distances, and can contribute to soil salinization.
OFRF has awarded a grant to Iris Vaisman and Dr. Martin Entz at the University of Manitoba in Winnipeg to help increase the use of green manures (GMs), which play an essential role in organic grain-based systems on the Canadian prairies by contributing to soil health, cash crop yield, and grain quality.
Although California has weathered many droughts, the current multi-year spell has been more widespread than most and includes the driest and hottest three-year stretch in 120 years of recordkeeping. Deliveries of surface water have decreased by a third in California’s Central Valley and numerous growers received less or no irrigation water in 2015.
Although strawberry production is an important industry in Florida, with 11,000 acres and a production value of over $300 million (USDA 2014), the state lags behind other regions in certified organic acreage. In an effort to support more organic production, OFRF has awarded a grant to researchers from the University of Florida to develop integrated pest and pollinator management strategies on certified organic land.
