The mountain ridges vary in height up to 4000 ft.
Moore that the sandstone ridges which here bound the trough have been recently elevated, and have been cut through by the Lukuga during the process.
For cotton cultivation the land is ploughed, carefully levelled, and then thrown up into ridges about 3 ft.
These large plants have from 40 to 50 ridges, on which the buds and clusters of spines are sunk at intervals, the aggregate number of the spines having been in some cases computed at upwards of 50,000 on a single plant.
Again following deflation, the diameter was 13mm with two ridges, an increase in diameter size of 5mm.
