6 books
A Treatise on Soils, Plants, and Manures (Classic Reprint)
Modern High Farming. a Treatise on Soils, Plants, and Manures - Scholar's Choice Edition
The Phosphates Of America. Where And How They Occur; How They Are Mined; And What They Cost. With Practical Treatises On The Manufacture Of Sulphuric Acid, Acid Phosphate, Phosphoric Acid, And Concentrated Superphosphates
Modern High Farming. a Treatise on Soils, Plants, and Manures
Modern High Farming
The phosphates of America