Systematic Training for Effective Parenting Systematic Training for Effective Parenting Systematic Training for Effective Parenting (STEP) is a parent education program published as a series of books. STEP was developed and published by the psychologists Don Dinkmeyer Sr., Gary D. McKay and Don Dinkmeyer Jr. The publication was supplemented by an extensive concept for training and proliferation. STEP has reached more than 4 million parents and has been translated into Spanish, French, German, and Japanese. Korean and Chinese adaptations are in progress. STEP is based on Alfred Adler's individual psychology and the work of the psychologists Rudolf Dreikurs and Thomas Gordon. An evaluation of the
Optimum water content for tillage Optimum water content for tillage The optimum water content for tillage (OPT) is defined as the moisture content of soil at which tillage produces the largest number of small aggregates. The Optimum Water Content of soil is the water content at which a maximum dry unit weight can be achieved after a given compaction effort. A max dry unit weight would have no voids in the soil. If you were trying to compact a hard dry soil to make it more dense, you might want to get it wet. The OPT is the water content of the soil in which