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between the technical methods of agriculture and their effects on the 

 water regime of the soil. The lack of sufficient statistics on the humidity 

 of soil, or various methods of investigating soil-water in the root inha- 

 bited soil layers and as a consequence of this the ignorance of the 

 laws regards the circulation of water in the soil made it difficult to 

 gather deductions regarding the latter or which is the same thing regar- 

 ding the phenomena of drought. 



The Odessa Experimental Field has several thousand sets of sta- 

 tistics at its disposal got together in the course of 15 years. And this 

 makes it possible, in my opinion, to get nearer to the truth. 



