Laserfiche WebLink
<br />23 <br />-~ weight of the samples before burning was intended to be entirely attri- <br />~ butable to burning of organic matter. However, the results were <br /> unreali stically high due to decomposition of aluminosilicates while <br /> burning (Broadbent, 1965). Generally, the average values obtained for <br /> topsoil samples are one and one half to two times higher than the average <br /> values obtained for the spoils samples. Assuming the organic matter <br /> <br /> content of the spoils is negligible and the proportion of aluminosilicates <br /> in the topsoil is similar to the proportion of aluminosilicates in the <br /> spoils, the extra weight loss of the topsoil may be due to organic matter. <br /> Still, some of the weight loss of the spoils may have been caused by <br /> burning of coal fragments. Because of these problems the organic matter <br /> <br /> estimat es are not considered very reliable. <br />J• <br />J <br />1 <br />J <br />7 <br />J • <br />L_ <br />