Typographical errors corrected in text:
Page 12: 'together with is long season' replaced with 'together with its long season'
Page 32: prunned replaced with pruned
Page 36: profiable replaced with profitable
Page 65: humous replaced with humus
Page 82: 'it must be sour' corrected to 'it must not be sour'. In sentence referring to lime which is used to reduce acidity (sourness).
Page 88: prsent replaced with present
Page 105: tisses replaced with tissues
Page 107: 'carried over the winter cankers' corrected to 'carried over the winter in cankers'
Page 126: Jose replaced with José
Page 163: (table) Syraying replaced with Spraying
Page 163: (table) Syraping replaced with Spraying
Page 164: 'The factors have always operated to deter' corrected to 'Two factors have always operated to deter'