Analysis of the farm economic opportunities for vegetable crops after the peanut quota phase-out : "an environmental-economic farm model for the Tar-Pamlico river basin, North Carolina"

arachide cacahuate carolina del norte caroline du nord environment environnement eua exploitation agricole explotaciones agrarias farms groundnuts hortalizas linear programming légume medio ambiente north carolina producción production programación lineal programmation linéaire reglamentaciones regulations réglementation usa vegetables états-unis