Subentries

– societies for promoting [4 references]

– recommendations for a national board or society [5 references]

– in college curricula [1 reference]

– pests [6 references]

– toast in praise of [1 reference]

– relationships of land, labor, profit [3 references]

– crop rotation [2 references]

– books on [4 references]

– observations of foreign travelers [1 reference]

– British improvements to [1 reference]

– fertilizer [5 references]

– study of soils [1 reference]

– role of, in U.S. economy [3 references]

– cultivation of melons [2 references]

– Mazzei's interest in [2 references]

– threshing machines [1 reference]

– American Board of Agriculture created [1 reference]