212 



and by the bad weather during harvest time it was useless to re- 

 cord the weights. A second application of 10 cwt per acre of 

 ground lime was given to one of the plots. Wheat follows in 1910. 



J. AUGUSTUS VOELCKER. Experiments with Magnesia on Wheat, 

 1909, at Woburn. Journal of the R. Agric. Soc. of Eng- 

 land, Vol. 70, 1909, pp. 362-388. 



Field experiments begun in 1908. The quantities of magnesia 

 (Mg O) applied for the wheat crop of 1908 were 3 cwt. per acre 

 and 6 cwt. (376 and 753 kgs. per hectare). 



The harvest results, as expected, did not show anything marked 

 as regards difference of crop weights, but the produce of each plot 

 was submitted to practical milling and baking tests, and these 

 showed that as the amount of magnesia in the soil was increased 

 the inferiority of the grain was more marked. 



These results being considered of much importance, the experi- 

 ments were continued in 1909. Wheat was sown in 5 plots; Be- 

 sides superphosphate and sulphate of potash, i */,, cwt. of magnesia 

 (ground fine) per acre (186 kgs. per hectare) was given as top 

 dressing in November. 



Examining the harvest results, the figures of the plots which 

 received the larger quantity of magnesia show the tendency of 

 magnesia to reduce the crop. The quality of the wheat was also 

 poorer. 



J. AUGUSTUS VOELCKER. Experiments with Magnesia on Po- 

 tatoes. (Journal of the R. Agric. Soc. of England, Vol. 70, 

 1909, pp. 387-388). 



Experiments were made in 1909, at the Woburn experimental 

 station of the R. Agric. Soc. of England, with magnesia in different 

 forms on potatoes. The forms used were: 



1) Magnesia (Mg O) at the rates of 3 cwt. and 6 cwt. per 

 acre (376,5 and 753 kgs. per hectare). 



2) Carbonate of magnesia 3 and 6 cwt. per acre. 



3) Magnesian lime, 6 cwt. per acre. 



4) Magnesian limestone, finely ground, 10 cwt. per acre (1255 kg. 

 per hectare). 



Magnesian limestone is carbonate of lime and carbonate of mag- 

 nesia, and the magnesian lime was the same material after burning. 



