Will Twin-Row Planting Systems Enhance Potato Production in Northern Maine? (P-21)

Potato production in Northern Maine has traditionally relied on single-row planting. As growers seek greater efficiency and sustainability, twin-row planting systems present a promising alternative. This study evaluated the feasibility of twin-row configurations with a focus on plant population, input use, and yield performance.
Field trials conducted from 2022 to 2024 compared twin- and single-row systems under uniform fertility and irrigation. Twin-row planting increased plant population by 40–60%, reduced labor by up to 60%, and allowed for a 15% reduction in fertilizer inputs. Yield consistently improved under twin-row management. In 2023, Caribou yielded 417 cwt/ac in twin rows vs. 324 cwt/ac in single rows; Burbank yielded 352 vs. 224 cwt/ac. In 2024, Caribou yielded 420 vs. 299 cwt/ac, and Burbank 372 vs. 294 cwt/ac, respectively.
These results indicate that twin-row systems can enhance productivity while reducing inputs. Further trials are needed to evaluate long-term impacts on soil health, disease pressure, and profitability, but early findings suggest twin-row planting is a viable option for growers in Northern Maine.