Errata for “Optimum Use of Erosion Control Blankets and Waste Ballast (Rock) Mulch to Aid Grass Establishment on Steep Slopes” by Yeboah Gyasi-Agyei

Please note, there is a unit conversion error in Table 7. The SI-2 soil loss values are in $\mathrm{kg}∕{\mathrm{m}}^2$ and need to be multiplied by 10 to convert them to tons/ha before adding to the values of SI-1 (reported correctly in tons/ha) to obtain the total soil loss. Here is the revised Table 7 showing the total soil loss and normalized soil loss, as well as the corresponding ranking. Figs. 9 and 10 have also been replotted to reflect the change.

Also, the statement on page 156 (column 1, line 17), “It needs to be stressed that there was an enormous decrease in soil loss between the first and second sampling intervals. Although the second sampling interval produced on average three times higher runoff, the soil loss was reduced by a third on the average, and the NSL reduced by an order of magnitude on the average. This is largely explained by over 65% average grass cover on all treated plots during the second sampling interval” is not valid. On the average, however, the soil loss increased by the same order of magnitude as the increase in runoff between the sampling intervals, as observed in the new Table 7. The discussions and summary following remain unchanged.