The Fertilizer Needs of the United States

Abstract

I. Introductory: the country's fertilizer requirements, 209. — Effects of farming methods, 211. — II. Nitrogen, 213. — Sources of supply, 214. — Nitrate of soda, 217.— III. Phosphoric acid, 219. — The phosphate beds of the South, 220. — IV. Potash; divergent opinions, 221. — Detailed survey of needs, by states, 222. — Domestic sources of supply, 235. — V. Conclusion, 237.