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C <br />ERO Resources <br />Annual primary productivity fractions were oven -dried to a constant weight <br />using a conventional microwave oven and weighed on an electronic balance <br />(accuracy to one-hundredth of a gram). Oven -dried weight data were <br />entered into computer data banks and mathematically reduced and summarized <br />by fraction according to vegetation type. <br />Cover data for herbs, shrubs and trees, shrub density and primary <br />productivity data have been subjected to the following kinds of <br />statistical analyses: <br />o Descriptive statistics <br />o Sample adequacy testing <br />o Student t -tasting <br />• These tests were performed to accomplish the following types of <br />assessments: <br />• <br />o Sample adequacy for sampled stands <br />o Similarity between affected and reference areas <br />o Establishment of degrees of difference between affected and <br />reference area pairs <br />Descriptive statistics were calculated for each vegetation type sampled in <br />each affected and reference area. The following categories of basic <br />statistical information were produced: <br />o sample size o standard deviation <br />o mean o standard error <br />o variance o % coefficient of variation <br />II.F- 8 <br />