تلخیص
The study was carried out on two soil profiles i.e., Lyallpur(TypicCamborthids) and Khurrianwala soil series (Natric Camborthids). Routine physical and chemical characterisation classified the Lyallpur Soil Series to be normal and Khurrianwala as salinc-sodic. Clay was measured by three methods i.e., Bouyoucos; Day's and Pipette. Clay measurement by Pipette method was considered as standard, and the values of clay measured by other two methods were compared. Comparison reveals an overall overcstimation of clay as 3.6% by Day's method and 29% by the Bouyoucos method. In the individual soil scries the overcstimation is 1.7% (Day's method) and 21% (Bouyoucos method) in Lyallpur soil series and 6.7% (Day's Method) and 42% (Bouyoucos method) in the Khurrianwala soil scries. Considering the above finding it is recommended that Day's method of particle-size analysis should be used in other similar arid-zone soils of low organic matter
S.A. Shahid , D.A. Jenkins . (1991) COMPARATIVE STUDY OF CLAY MEASUREMENT BY VARIOUS METHODS , The Journal Soil & Environment , Volume 6, Issue (3-4).
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