bushel. It was on these non-potash plots that rust and other 

 fungoid diseases were most rampant. As a rule potash shows its 

 maximum effect in dry rather than in wet seasons like 1909. 



The barley was sown on Hoosfield (the 58th successive crop) on 

 April 6th, 1909. Owing to the favourable weather during April and 

 May a good plant was obtained, and the yield was rather above the 

 average, in fact considerably above the average of recent years. 

 Many of the plots were laid, the dunged plot suffering most. 



On the permanent grass plots the herbage was late in starting 

 growth. The yields were generally below the average ; the pro- 

 portion of leguminous plants in the herbage was also below the 

 average. Great contrasts are now to be observed between the limed 

 and unlimed portions of the plots that have become acid through 

 the long continued use of ammonium salts. The patches of dead 

 herbage are extending on the acid portions, while the limed portions 

 have come back to a normal appearance. 



The Mangold field was sown on April 21st and 22nd, 1909, and 

 though the seed was a little slow and irregular in germinating, 

 eventually a good plant was obtained, except on the ammonium 

 plots. The yield was generally above the average, especially on 

 those plots receiving dung or rape cake. The usual fungoid attack 

 of Uromyces betae on the plots receiving an excess of nitrogen was 

 not so prominent this year. 



On the Agdell field barley was grown. The yield was fair, but 

 showed no special features. 



Barley was also grown on Little Hoos field, where the duration 

 of manurial residues is being tested. A good plant was obtained 

 and the yields generally were high, although there was an excessive 

 amount of straw and many of the plots were laid. 



On Little Hoos field also some subsidiary plots were put down 

 to demonstrate the comparative value of nitrogen in the new 

 fertilisers — cyanamide and nitrate of lime — as compared with 

 sulphate of ammonia and nitrate of soda. Each plot received 

 50 lbs. of nitrogen per acre, rather too large a quantity for the wet 

 season, with the result that all the plots were laid. The yields from 

 the four fertilisers were very similar, sulphate of ammonia being a 

 little the best and cyanamide the worst, though the differences would 

 fall within the limits of experimental error (see p. 14). 



In the Laboratory the investigations, by means of plants grown 

 in pots, of the question of whether a plant unfits the soil for its 

 repeated growth was continued, though no results can at present be 

 reported. Drs. Russell and Hutchinson's investigation of the effect 



