144 HATCH EXPERIMENT STATION. [Jan. 



that the differences in yields under the two systems of manuring 

 will increase from year to year, and that the superiority of the 

 mixture of fertilizers containing more potash will therefore be- 

 come increasingly evident. 



X. — Experiment in manuring Grass Lands. 



In this experiment, which has continued since 1893 upon 

 one uniform system, our object is to test the value for pro- 

 duction of grass of the system of using wood ashes, ground 

 bone and muriate of potash, and manure, in rotation. 

 Owing, however, to the fact that the land has been for 

 many years in grass, and that it has never been cultivated 

 consecutively for a sufficiently great length of time to free 

 it from weeds, the sod had become considerably infested 

 with daisies, ragged robin, buttercups, and a number of 

 other species. It has accordingly been decided to break up 

 and reseed a part of the land. A portion has been culti- 

 vated for two years, and is now reseeded. This portion 

 constitutes a f)art of plot 3. This year, after the harvest 

 of the first crop, which was cut early to avoid ripe weed 

 seeds, a portion each of plots 1 and 2 was broken up. This ' 

 was frequently harrowed between the date of ploughing, 

 which Avas about the middle of July, and the date of seed- 

 ing, which was August 15. The portion of plot 3 not 

 previously broken up has been similarly treated. The area 

 reported upon this year, therefore, comprises only a por- 

 tion of the plots included in this field, the total area of 

 which is about nine acres. 



The rates at wdiich the several manures are employed are 

 as follows : wood ashes, 1 ton per acre ; ground bone, 600 

 pounds, and muriate of potash, 200 pounds, per acre ; ma- 

 nure, 8 tons per acre. 



The plot which receives wood ashes one year is the next 

 year manured with bone and potash, and the third year 

 with manure. 



The manuring of the several plots is so planned that each 

 year we have one plot under each of the systems of manur- 

 ing. For the last three years the plots receiving respec- 

 tively wood ashes and bone and potash have also received 



