72 



EFFECT OF PHOSPHATES 



year makes its appearance towards the end of May if the season is 

 a suitable one. During a dry unfavourable season like that of 1919 

 clover was almost entirely absent (Table XXII). Moisture and tem- 

 perature determinations were made on Plot 2 basic slag, and Plot 3 

 untreated, throughout the season of 1920, and the records are shown 

 in Table XXXVII. 



TABLE XXXVII. EFFECT OF BASIC SLAG ON THE MOISTURE CONTENT 

 AND TEMPERATURE OF THE SOIL AT MARTIN'S HEARNE 



At Martin's Hearne there is no appreciable difference in the tempera- 

 ture records of the two plots either at a depth of 3 inches or at 9 inches. 

 There is a big difference in the yield of hay on the two plots, namely, 

 31-9 cwts. per acre on Plot 2, and 22-0 cwts. per acre on Plot 3. The 

 bottom in both plots however is an open one, due to the recent 

 practice of cutting every year, and the better growth on the slag plot 

 does not act as a cover to any appreciable extent. 



