Maine State College Experiment Station Eeport, 1895. Plate 1. 



Peas. 

















Si 







r a 







?| - 



* ■.■■ : ' 









1 ^yHHBsli 



W 1 * 



Box 1. Soluble Phosphoric Acid. 



Bos 2. Insoluble Phosphoric Acid — Florida Eock. 



Box 3. Insoluble Phosphorate of Iron and Alumina. 



Box 4. Xo Phosphate added. 



