Trends in Illinois farmland parcel size
click image to zoom The recent upswing in U.S. farmland prices is well-documented, with recent posts describing the USDA's estimate of annual valuation change, and comparisons to other asset classes. The other key dimension of farmland sales, the amount of farmland transferred, is less frequently evaluated. This post discusses temporal and regional trends in parcel size of Illinois farmland sales from 1979 to 2011 using Illinois Department of Revenue (IDOR) farmland transfer data. To ensure the most representative collection of IDOR data, only arms-length sales of unimproved farmland classified as a farm or an empty lot were analyzed. Furthermore, only transfers between 10 acres and 1280 acres in size and between $100 and $20,000 in per-acre price were included in the data used in this analysis. These screens do limit a few potential outliers, but help provide a more realistic view of "typical" sales.
Figure 1 displays the average Illinois farmland transfer sizes from 1979 to 2011. The notable increase in parcel size transferred may reflect expansionary pressures in the agricultural sector that are a product of trends in farm technology and the economics of farming. From 1979 to 2011, the average Illinois farmland transfer size grew from 53.7 acres to 68.9 acres, an increase of 28.2 percent. Similarly, USDA data show that, from 1978 to 2012, the average Illinois farm operation size grew from 270 acres to 358 acres, an increase of 32.6 percent. Though not directly correlated, to the extent that some farm sales are "whole operations", the increase in transferred parcel size may simply follow the natural change in operation size.
click image to zoom Figure 2 further delineates transfers by showing the shares of annual transfers that fall into various size categories. The shares of farmland transfers in the two largest size categories have increased through time while the shares of farmland transfers in the two smallest size categories have done the opposite. Figure 2 indicates that transfers of 40 to 80 acres have historically been very common in the Illinois farmland market, a pattern that is unchanged in recent years. Sales of 20 to 40 acres and sales of 80 to 160 acres are also relatively common. In fact, in every year from 1979 to 2011, at least 75 percent of Illinois farmland transfers were between 20 and 160 acres in size. There was a marked downturn in small (10 to 20 acre) farmland transfers from 1979 to 2011. Transfers of 10 to 20 acres decreased from 20.3 percent of all Illinois farmland transfers in 1979 to 14.4 percent of all transfers in 2011, a 30.8 percent decrease in relative activity. On the other hand, sales of 160 to 320 acres were 162.6 percent more common in 2011 than in 1979. Together, changes to the frequencies of 10 to 20 acre sales and 160 to 320 acre sales were responsible for much of the upward trend in average transfer size shown in Figure 1.