PLOWING: PLOWING, DEEP OR SHALLOW, chap. xiv, 87; the Deep Plowing of _all_ lands, not advocated, 85; reasons therefor, 85; instances where Deep Plowing was unadvisable, 85-6; the primitive plow, 86; plowing in New Hampshire in the author's boyhood, 87; will Deep Plowing pay? 87; author's experience of the plowing of a plat in New York city, 87-8; plows deeply with profit, 88-9; an English farmer's trial of Deep Plowing, 89-90; the imperative reasons for Deep Plowing, 90. PLOWING--GOOD AND BAD, chap. xv, 91; misconceptions regarding Deep Plowing, 91; the right conditions for Deep Plowing, 91; case of a farmer of the old school cited, 91-2; how Deep Plowing will prove profitable to him, 92-3; how he should proceed, 92-3; subsoiling hill-sides, 94; author's own experience, 94; the revolution that steam-plowing will cause, 95; plowing of Grass land considered, 95; treatment of Grass land that has been plowed, 95; plowing of a poor man's rugged sterile farm, 97-9; Fall-plowing, 99-100; fences impede plowing, 100; favored lot of the squatter on the prairie in regard to plowing, 101; the plows of sixty years ago, 237; the plows used in the greater part of Europe, 238; improvement in plowing inevitable, 241; the improved system would be adopted in the West, 241; steam plows and their inventors, 243; at work in Great Britain, 243-4; the locomotive that is needed for steam-plowing, 244; losses from want of such, 244-5; necessity for greater rapidity in plowing demonstrated, 246; advice of a German observer on plowing for Corn, 246-7; author's experience of the cost and delay of plowing, 281-2; not half so much or so thorough plowing done as there should be, 282; the imperfect means of plowing, 282; steam-plowing in England, 283-4-5; application of the facts to this country, 284. _See also_ STEAM. PLUM-TREES. _See_ FRUITS, _also_ 129, 139, 294. PO, the river, 74-5. PORK, 37, 99, 143, 186, 191, 220, 238, 291. POTASH. _See_ FERTILIZERS, COMMERCIAL, also 109.