Overview: Our test results show that potting soil is on par with ARHS soil in all areas except humus. However, when the soil was wet, it appeared that the potting soil contained more humus, leading me to conclude that there was an error. Additionally, our group (the one responsible for potassium) used the wrong test tube to measure potassium levels in ARHS soil. However, potassium levels in ARHS soil are undoubtedly still lower than those in potting soil. Soil Quality Analysis: In agricultural terms, loam is of equal and often greater quality and fertility than ARHS soil in most areas, with the exception of phosphorus. , where it has levels above optimal levels. First, phosphorus levels in ARHS soil are slightly less ideal than those in potting soil. For example, phosphorus levels in ARHS soil and potting soil are 37.5 ppm and 25 ppm, respectively. At first we can see that ARHS soil has higher phosphorus levels than potting soil, and indeed this is the case, but the method by which we measure the soil differs. For...