Book excerpt: Now you can tap the source of many of agriculture¿s most popular progressive farming tools. Ideas now commonplace in the industry, such as ¿crop and soil weatherproofing,¿ the ¿row support system,¿ and the ¿tillage commandments,¿ exemplify the practicality of the soil/root maintenance program that serves as the foundation for Schriefer¿s highly-successful ¿systems approach¿ farming. A veteran teacher, lecturer and writer, Schriefer¿s ideas are clear, straightforward and practical.