Columbia subject headings:
Harvard subject headings:
Agriculture and state--United States--Congresses.
Agriculture--United States--Congresses.
Land capability for agriculture--United States--Congresses.
Land use, Rural--United States--Congresses.
Produce trade--United States--Congresses.
Soils--United States--Congresses.
Princeton subject headings:
Agriculture and state--United States--Congresses.
Agriculture--United States--Congresses.
Land capability for agriculture--United States--Congresses.
Land use, Rural--United States--Congresses.
Produce trade--United States--Congresses.
Soils--United States--Congresses.