AVEKAGE PKODrci-: or IM.OTS :'>:, 



phosphate contains 37 per eeiit. pliospliatc luaiK- si.IuhU-. or Ci; Ih. ,,t soluhU- 

 phosphorie acid. 



On Plots 9, 15, 16, and 19 certain ehanjres in the niaiuirinjr have been 

 made (hning the progress of tlie experiments, which are set out in detail in 

 the "Memoranda" for 1901. 



Table XV. shows the average production of grain and 

 straw for the whole period of fifty-one ycar.s for thr la.st ten 

 years, and for the single year 1902. 



Table XV. — Experiments on IVlicat, Broadhalk Field, rrodnce of Grain 

 and Straw per acre. Average over 51 years (1852-1902); and ovrr 10 

 years (1893-1902) ; aho Produce in 1902. 



Produce by Minerals 



Produce by Ammonium-salts 



The grain is expressed in measured 1)iis1il'1.s per acri", tiie 

 weight of the bu.shel depending on the plot and season. The 

 .straw, which includes chaff, etc., is given in cwt. per acre. 



Table XVI. shows the average production of certain of the 

 plots for the five successive ten-year periods from 1862 to IImh. 

 Although ten-year periods are not long enough to entirely 

 remove the effect of season, yet the table enables one to judge 



