Agriculture and Soils of the Cape Province. 



{^i:>'^ 



Regarding- the patchy colour of the area from which No. 608 was 

 taken it is impossible without further investigation to say what the 

 variability originates in ; it may be connected with the variable 

 thickness of the exposed beds of cave sandstone which lie above it. 



Table VI. 



Analysis of Soils from. Olivif^r' s Rust. 



The mechanical analysis shows that these two soils contain very 

 much less coarse sand than any of the other soils of the series. Thi'S 

 feature is to be associated with their origin from rocks built up of fine 

 particles, particularly the fine-grained cave sandstone. 



No. 608 bears considerable resemblance to the mixed sand and 

 turf soil from The WiJlows (No. 615), both chemically and 

 mechanically. The chief mechanical differences are that No. 608 

 contains less than a quarter as much coarse sand as No. 615, slightly 

 more silt, 5 per cent, more fine silt, and about the same quantity of 

 clay. The net result is that No. 608 has a somewhat finer texture, 

 which is reflected in the greater permeability to water of No. 615. 

 Chemically, No. 608 is somewhat superior to No. 615 in every respect. 

 Bearing these differences in mind the remarks made hig-her up in 

 connection with No. 615 also apply to No. 608. 



Comparing No. 609 with the black turf soil of The Willows one 

 finds considerable differences. AVhile the amounts of clay in the two 

 soils do not differ materially, and No. 609 contains no more than 

 8 per cent, more silt and fine silt, one would expect a considerable 



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