12(3 HATCH EXPERIMENT STATION. [Jan. 



from 1892 to 1<S9!> inclusive, at the rate of 400 pounds per 

 acre; since 1900 the rate of application has been 250 pounds 

 per acre. Fine-ground bone at the rate of 600 pounds per 

 acre has been yearly applied to all plots. The number of 

 plots in the field at present is ten, five receiving muriate of 

 potash, and alternating with the same number of plots which 

 yearly receive sulfate of potash. Various crops have been 

 grown in rotation, including potatoes, field corn, sweet corn, 

 grasses, oats and vetch, barley and vetch, winter rye, clovers 

 of various kinds, sugar beets, soy beans, and cabbages. 

 Most of these crops have been grown during several years. 

 With few exceptions, good yields have been obtained. 

 Among the crops grown, the potatoes, clovers, cabbages and 

 soy beans have usualU^ done best on sulfate of potash. The 

 yield of corn, grasses, oats, barley, vetches and sugar beets 

 has been about equallj'- good on the two salts, while the 

 quality of the potatoes and sugar beets when grown on sul- 

 fate of potash has been distinctly better than on mui'iate of 

 potash. Three years ago, two of the plots in this field were 

 set to small fruits, asparagus and rhubarb, — on each plot 

 one row each of raspberries, blackberries, asparagus and 

 rhubarb. Aside from the crops just named, those of the past 

 3^ear have been cabbages on two plots and three varieties of 

 clover, namely, Mammoth Red, Medium Red and Alsike, 

 each on two plots. The clover was sown in the spring, and 

 the product of the plots was considerably mixed with weeds ; 

 for this reason, the weights were not taken. There was no 

 readily distinguishable dilference in the growth of either the 

 Medium or the Mammoth clovers that could be attributed to 

 the difference in potash manuring. The Alsike clover upon 

 the plot manm-ed with sulfate of potash has made a distinctly 

 better start than that on the muriate. Neither the asparagus, 

 raspberries nor blackberries have yet become sufficiently 

 established to give a full crop, and the results will not be 

 reported in detail. The yield of asparagus was substantially 

 equal on the two potash salts. The yield of raspberries on 

 the muriate of potash was considerabl}^ greater than on the 

 sulfate. Observation of the growth of the berry bushes and 

 asparagus since they were set indicates that the rate of 

 manuring Avliich has been the practice on this field does not 



