Bulletin Volume 71-74 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...M. Nature Study as a Link Between School and Home--Mrs. Phelps. 11:00 A. M. Discussion. 11:15 A. M. Home Economics in Connection With Farm Bureau Work--M iss M ills. 11:45 A. M. Discussion. 1:30 p. M. Pound Table: How Can We Fse Lqst Year's Experience to Better This Year's Work? 2:30 p. M. Canning Club Work--Miss Nye. 3:00 p. M. Discussion. 3:15 p. M. Home Economics at the College of Agriculture--Prof. Van Rensselaer. 3:45 p. M. Discussion. 4:00 p. M. The People's Choral Union in New York: Can Its Methods be Adapted to the Needs of Rural Communities?--Miss Huff. Wednesday 9:00 A. M. Practical Farm Cooperation--Mr. Cole, Mr. Mitchell. Farm Management--Dr. Warren, Mr. Burritt. Farm Bureaus--Mr. Burritt. Summary of Findings of Agricultural Experiment Stations--Mr. Hall. The Latest in the Poultry Industry--Prof. liice Summary of Proceedings of the Sixteenth Annual Normal Institute for New York State Workers THE RELATIONS OF PHOSPHORIC ACID TO AGRICULTURE Dr. L. L. Va: s Slyke 1. Definition: The term phosphoric acid used in its chemical sense means the oxide of phosphorus (P2 06), but used agriculturally it means the compounds of phosphorus or phosphoric acid, which are called phosphates. It is the custom to express the amount of phosphate compounds in the form of phosphoric acid; for example, acid phosphate contains 14 per cent of phosphoric acid (P2 Os); bone 20 to 25 per cent, etc. 2. Forms or Compounds of Phosphoric Acid: In fertilizers phosphoric acid is usually present in the form of three different calcium (lime) compounds: (1) soluble phosphoric acid (acid or mono-calcium phosphate) (2) reverted phosphoric acid (neutral or di-calcium phosphate) (3) insoluble phosphoric acid (tri-calcium phosphate) The first two forms taken together are called available ph...