316 The Woburn Pot- Culture Experiments, 1914. 



For more detailed information regarding the several plots 

 reference may be made to Table II. (continuous barley) in the 

 present Field Experiments report (page 289). 



It was determined to carry out three methods of treatment 

 in the case of each soil. In the first of these the soil as it 

 occurs in the field and without further treatment was taken. 

 In the second case carbonate of lime was added in the 

 quantities ascertained by Dr. Hutchinson to be sufficient to 

 just neutralise the soil acidity. In the third case carbonate of 

 lime was added to 50 per cent, in excess of the figures supplied 

 by Dr. Hutchinson, lime thus being in marked excess. 



The carbonate of lime (chalk) was in each case ground up 

 finely and intimately mixed with the whole of the soil used in 

 each pot. Earthenware pots, each holding 34 lb. of soil, were 

 used. On April 14, 1914, barley was sown, 12 seeds per pot, 

 the plants, being, later on, thinned to six per pot. 



The crops grew well throughout ; the chief points of 

 difference observed during the growth are given below, and the 

 crops were cut on August 26, 1914, and weighed. The results 

 are given in Table IV. 



Table IV. — Acidity of Soil, Stackyard Field. 

 Barley, 1914. 



Gontinuaus 



