1932 Print Nitrogen Green Manure Alfalfa Montana Grain Farming Field Soil FZ1 SAI This is an original 1942

This is an original 1942 black and white relief line-block print of the letter "F

This is an original 1933 halftone print of men not performing a dance routine

Clamshells

Pullman Company

Iron Illustrations Vintage Advertising

1932 Print Nitrogen Green Manure Alfalfa Montana Grain Farming Field Soil FZ1 SAI This is an original 1942This is an original 1932 halftone print of an alfalfa field in Montana. The caption writes, "The nitrogen industry can never wholly displace green manure which farmers grow on their own soil. Two crops are being harvested on this alfalfa field in Montana, a crop of forage and a crop of fertilizer. For the alfalfa plants, still growing after mowing, will be plowed under and (since alfalfa, like other members of the clover family, is a nitrogen