The Internet Archive has a preservation copy of this work in our general collections.
Apart from the intrinsic values of the soils from a chemical' point of view, they grade mechanically by easy stages from sand to clav. The sand, although largely of quartz, has a fair proportion of felspar, together with a considerable quantity of aeolian dust, hence its productive but not lasting qualities under irrigation. The ordinary red soils are a mixture of sand and. clay, matured by oxidation, and with their amIJle percentage of lime form, when properly cultivated, an excellentdoi:10.1080/18324460.1913.10439249 fatcat:3jyzcuprazdudaelqi5aj422ie