FIELD TESTS ARE BEST 361 



/ _ No treatment 



2 Acid 



5 Muriate of \ potash 



4- A/o treatment 



<S _ Aiitrate. of \&oda 



_ Acid phosphate and\ nitrate, of 



7 _ A/o treat \nent 



S^ _ AiCld phosphate. ana\ muriate. o 



? _ Muriate of potash and Citrate of 



/ _ /Vb tre at m ent 



// Acid phosphate j potash, land nitrate o-f 



/ Acid phosph&f'e, pofasH, <and nitrate of 



/J _ /Vb treatment 



14- 'Fhosphafe , pota&h and \nifraie of so da ^ com 



_/ _ ^ _ _ " i " ' " wheat 

 /* A/o treat be- nt 



n Some <?a // hut more, pho&phgte and" /e&s nitrates 

 // Manure. , $ tons, on , corn an 



No, 



2o Manure > -4- tons on\corr\ 



22 No 



b/ood 



2.4 Same as /?, but nitro'q <sn /n Sulphate ammon/a 

 _* A/o treatment 



27 S^?(? as 17 but fiiffoqen in n/firate of //' 



A/o 



Lime.. A/O ///<2. 



FIQ. 227. A aeries of experimental plots. (Ohio Station.) (See Fig. 229.) 



