300 Journal of Agricultural Research voI.xv.no. 5 



tolerant at the equivalent moisture content; but with the organic matter 

 added, which greatly increased the equivalent moisture, there is no 



DaC/ inp.p.m. of dry soil 



^00 1000 2000 3000 4000 



no 

 manure ' 



s% 

 manure ^.•y^'.^T.^'^ _ „ _ _ 



manure ^TIj'^nil'^TsJ'r^T^""^""'^^ 



is% 

 manure ' 



manure 



''^ont plant »— > =o.igm- dry mofler 



DajCOj in p.p. m. of dry soil 



500 1.000 3.000 5.000 1000 10000 



manure ^<iy^^ilMzy^:^A_J^^jK^A.J^ 



— one plant 



'O.iffmdrymofter 



Hoj SQf in p.p. m. of dry soil 



500 1.000 3.000 5.000 7,000 lO.OOO 



■monurs ^iy^zy<^^y<^'^^ 



manure _ _ _ 



manure. Q5^!5©^vJi^l(j^j^^ 

 10% ~ ~ 



manure 



IS 7, 



manure 

 manure 



*=ont plant ""^ '^ o.i ym. dry rftattcr 



Fig. 13.— Diagram showing the number of wheat plants up and the dry matter produced in sand with 

 diJIerent amounts of manure containing sodium chlorid, sodium carbonate, and sodium sulphate added 

 in various concentrations. Soils manintained at an equivalent moisture content. 



appreciable effect. All these results considered together seem to indicate 

 that loams are more tolerant than sands or clays, and that at the same 



