Freelancing is not just a U.S. phenomenon, but is now spreading around the world. 1  There are approximatly 53 million freelancers in the U.S. contributing $715 billion in earnings to the national economy. 2  80% of all workers in the U.S. surveyed said they would do work on the side if it came to them to earn extra money.
pH value. A number denoting the degree of acidity or of basicity (alkalinity); 7 is a neutral value; acidity increases with decreasing values below 7; basicity increases with increasing values above 7.
PH is a measure of the acidity or alkalinity of a substance. The range of pH for most soils. is from 4 to 10 (Figure 1). The pH scale is logarithmic, meaning that a change in one numerical. pH unit equals a 10-fold change in acidity or alkalinity. For example, a soil with a pH of 8 is ten. times more alkaline than a soil with a pH of 7.