Crops and Methods for Soil Improvement
Chapter 21
TILLAGE 220-229 Desirable physical condition of the soil 220 The breaking-plow 221 Types of plows 221 Subsoiling 223 Time of plowing 223 Method of plowing 224 The disk harrow 225 Cultivation of plants 227 Controlling root-growth 227 Elimination of competition 228 Length of cultivation 229