EXPERIMENT STATION BULLETINS. 



399 



TABLE 3 LIGHT SANDY SOILS RESPOND QUITE READILY TO LIME AND POTASH 



CASS COUNTY FARM. 



Plat 

 No. 



I 



Is 



2 



6 



6s 



7 



10 



11 



lis 



Treatment. 



Neither lime nor fertilizer applied 



Ground limestone 6,300 pounds per acre. 



Ground limestone 6,300 pounds per acre. 

 Acid phosphate 200 pounds per acre .... 

 Sodium nitrate 100 pounds per acre. . . . 

 Potassium chloride 100 pounds per acre. 



Ground limestone 6,300 pounds per acre. 

 Acid phosphate 200 pounds per acre .... 

 Sodium nitrate 100 pounds per acre. . . . 



Ground limestone 6,300 pounds per acre. 

 Sodium nitrate 100 pounds per acre. . . . 

 Potassium chloride 100 pounds per acre. 



Ground limestone 6,300 pounds per acre. 

 Acid phosphate 200 pounds per acre .... 

 Potassium chloride 100 pounds per acre . 



Neither lime nor fertilizer applied 



Ground limestone 6,300 pounds per acre. 



Ground limestone 6,300 pounds per acre 

 Sodium nitrate 100 pounds per acre. . . . 



Ground limestone 6,300 pounds per acre, 

 Potassiiun chloride 100 pounds per acre. 



Ground limestone 6,300 pounds per acre 

 Acid phosphate 200 pounds per acre .... 



Ground limestone 6,300 pounds per acre , 

 Rock phosphate 1 ,000 pounds per acre . . 



Neither lime nor fertilizer applied 



Ground limestone 6,300 pounds per acre 



Yield of Sweet 

 Clover. Green 

 Weight per Acre 

 Ave. 1920-1921. 



Seeding total failure. 

 3.508 



7,544 



i 4,476 



i 6.736 



i 6,158 



Seeding total failure. 

 5,248 



I 4,872 



I 6,456 



j 3.885 



I 3,360 



Seeding total failure. 

 3,800 



The four highest yielding plats received ground limestone and 

 potassium chloride either in combination with sodium nitrate and acid 

 phosphate or alone. The third highest yielding plat received only lime 

 and potash. None of the other plats received potash. Three plats re- 

 ceived neither lime nor fertilizer and on these plats the sweet clover 

 seeding was a total failure. The results secured from the use of the 

 fertilizer on the rye and wheat were also quite pronounced. 



Inoculation. 



If neither sweet clover nor alfalfa has been grown successfully on 

 the field, artificial inoculation should be made. Since inoculation en- 

 ables sweet clover to make use of the free nitrogen of the air, it is 

 especially important to inoculate when seeding on soils low in nitrogen 

 and organic matter. There are several different methods of inoculation, 

 the pure culture being the simplest and easiest to apply. Material for 

 the pure culture method may be secured from the Department of Bacter- 

 iology of the Michigan Agricultural College, East Lansing, Mich. The 

 priqe is twenty-five cents per bottle and one bottle is sufficient to inofu- 



