摘要：An empirical model accurately estimates row crop and extensive crop acreage in the North Central region. It shows (a) for each 1-acre increase in diversion, rcw crops decrease 0.62 acre and extensive crops decrease 0.12 acre, and (b) the annual shift to .row crops is diminishing.
关键词：Soybeans;corn;acreage;North Central region;regression analysis;time series.
