he experiments here depicted and described have been conducted 

 partly in Culture Pots and partly on the Experimental Field of 

 the Bernburg Experimental Station. Of the vegetation experi- 

 ljl|jj'^%i|jl^ ments, those with grass were conducted in soil, the others in a 

 mixture, very poor in plant food, of sand along with 6" .. purified 

 mould. The field experiments are permanent experiments and the photographs 

 represent the yields, in the case of wheat and potatoes as the results of 1912. 

 On account of the unfavourable weather conditions — in the case of the potatoes, 

 the seed in addition was found to be bad - the crops of 1912 were poor in 

 this locality and the changes on the plants, caused by the various dressings have 

 thereby not been influenced. 



Accompanying the photographs of the crop of 1913, the yields are given. 



Summer wheat. 

 (Tables 1 and 2). 



Variety: Red Bordeaux. 

 Field Experiment 1912. - Field on the Experimental Station. Strip - G. 



Plots 2 n and 3. 

 Medium Loam. - Sown 18"' March. - Harvested 30"' August, 

 Photographed S^h August 1912. 



7 — 



