Maine State College Experiment Station Eeport, 1895. PI ale TV. 



Barley. 



Corn. 



Box 1. Soluble Phosphoric Acid. 



Box 2. Insoluble Phosphoric Acid — Florida Kock. 



Box 3. Insoluble Phosphorate of Iron and Alumina. 



Box 4. No Phosphate added. 



