PLOWING SOD 



141 



FiQ, 72._Three types of plowlbottoms : 1, stubble bottom; 2, general purpose; 3, sod 



->ViU. 



a 



Fig, 73. — Adjustment of coulter. A, ordinarily set coulter one-half inch from landside 

 (c). In deep plowing or for sod one-quarter inch. Secure a full furrow slice to keep shin 

 covered with dirt. B, set middle of rolling coulter about three inches back from point. In 

 loose or trashy soils, one or two inches back. In hard or sticky soils, about four inches back. 



. . FiQ. 74.— Different types of coulters and jointers. Note proper adjustment. 1, 

 jointer; 2, rolling coulter; 3, blade coulter or hanging cutter; 4, fin coulter or cutter: 6, 

 combination rolling coulter and jointer; 6, knee cutter or coulter. 



