Report of progress of work and guide to experimental plots, North Central Experiment Station, Grand Rapids

At head of title: The University of Minnesota, Agricultural Experiment Station.

Precision planter and fertilizer applicator for use on experimental plots /

Cover title.

Report - Rothamsted Experimental Station.

At head of title: Rothamsted Experimental Station, Harpenden, England.

Report.

Reports for <1908-1929> include Supplement to the "Guide to the experimental plots".