304 Journal of Agricultural Research voi. xv, No. 5 



garden soil, sifted peat, and sifted manure in varying quantities on the 

 toxicity of alkali in sand at the same and at equivalent moisture con- 



HqCI inp.p-m- of dry soil 



400 1.000 2,000 J.000 tooo 



no 

 manure^ 



manure '^^^^^^r^T^'^-^^J "^••••^•••^"♦^ • ' 



manure ' 



manure ^^A^3^^*Cf''^^^I>^^^^^^^ 



manure ^ 



20^. 

 manure ^tfij 



• = one plant -"^ = oigmdry mafUr 



Dqj, CDj in p.p- mofdryso il 



300 woo 3,000 S.OCO 7,000 



20'X 



manure 



• = one plant 



= 0-1 om- dry matter 



/lo^SO^ in p.p. m. of dry soi! 



SOO 1,000 J.OOO 5,000 7,000 10,000 



no 

 manure ^V?^ "'y^'VA 



manure ^ 



manure ' 



manure ' 



manure V^iy^^A^^^^ip?^^;/^!^^^^^^^^^ 



manure "^^^^h^^f^Jj^zb^^i^^^l^T^lMz^^ 



• = ont plant ■■^-« = o-iqnndrY matter 



Fig. i6.— Diagram showing the niunber of wheat plants up and the dry matter produced in 21 days in loam 

 with diEferent amounts of manure containing sodiimi chlorid, sodium carbonate, and sodium sulphate 

 added in various concentrations. Soils maintained at an equivalent moisture content. 



tents and of fresh chaff, peat, and manure on loam. The peat used was 

 a rotted woody and leafy material deposited by Logan River. The 

 manure was fairly well rotted. The results are shown in figures 8 to i6. 



