Compressing soil. Farmers know that driving heavy equipment on wet soil compresses the
Chapter 0, Problem 26.31(choose chapter or problem)
Compressing soil. Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. Table 2.3 (text page 61) gives data onthe penetrability of the same soil at three levels of compression.9 Penetrabilityis a measure of how much resistance plant roots will meet when they try to growthrough the soil. Does penetrability systematically change with the degree ofcompression? Do a complete analysis that includes a test of significance. Include astatement in words of your null and alternative hypotheses.
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