10 KEPORT ON" THE KLAMATH MARSH EXPERIMENT. 



CONCLUSIONS. 



(1) The Klamath marshlands on the Lower Klamath Lake have 

 been formed through the disintegration of aquatic vegetation and 

 without the deposition of any considerable quantity of rock sediment 

 or silt. They are therefore lacking in essential elements of fertility. 



(2) These swamp lands contain a sufficient quantity of alkaline 

 salts, chiefly carbonate of sodium (black alkali), to render them 

 unfit for crop production until these salts are leached out. 



(3) On account of the highly impervious character of the marsh- 

 land, the leaching out of these alkaline salts is rendered very difficult 

 and appears to be impracticable by any methods at present known. 

 The expense would exceed the prospective value of the land. 



(4) The air-drainage conditions on the Klamath marshlands are 

 such that low temperatures and killing frosts are likely to occur 

 exery month in the year, thus limiting the possible agriculture to the 

 hardier species of crop plants. 



Approved : 



Ja3ies Wilson, 



Secretary of Agriculture. 



Washington, D. C, July 2'2, 1911. 



[Clr. 86] 



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