PROCEEDINGS OF THE COTTESWOLD CLUB III 



These were, before the end of the season, attacked by 

 plant Uce, and the resuhs somewhat vitiated thereby. In 

 1884 some shght modifications were made in the quantities 

 of Potassium and Phosphoric Acid supplied, but the 

 results not only confirmed those of the preceeding year, 

 hut were more pronounced. The plants with little or no 

 Nitrogen after growing well for a few days passed through 

 a period which the experimenters call a period of inanition, 

 then proceeded by leaps and bounds and passed all the 

 rest. 



In 1885 a greater number of pots was taken with no 

 Nitrogen supplied to them, but the same results followed, 

 though with some irregularity as to the time when the 

 inanition period terminated. 



Analyses and tabulations of the results no less elaborate 

 and thorough than in the case of the Cereals corroborate 

 the deductions from the appearances of the growing plants, 

 and support the general conclusions arrived at by 

 Hellriegel and Wilfarth. These were : 



1st — The quantity of dry produce in oats and barley 

 is in strict relation to the Nitrate supplied, for 



{a) Without any Nitrogen in the soil the produce is 

 Nil. 



{b) Maximum growth is only reached with large 

 doses. 



(r) There is an oscillation in the growth with a variation 

 in the quantity of Nitrate. 



{d) Each dose of Nitrate produced proportionate 

 results. 



2nd — There is no indication whatever in oats and 

 barley of any other modes of obtaining Nitrogen. 



3rd — Peas showed no relationship whatever between 

 their growth and produce and the amount of Nitrogen 

 supplied to them, for 



{a) Luxuriant vegetation was shown with no Nitrogen 

 at all. In 1883 one pot of peas with no Nitrogen 



