1930] Praca CuLTurk IN CALIFORNIA

33

decay, in order to make pulling easier. Axes, and dynamite may be
used to cut roots to loosen those trees which are very diffieut to remove.
On the basis of removal of peach trees from ten acres, it is estimated
 that the cost per tree will average eight cents when a heavy
tractor is used. or about fifteen cents when a stump puller is used.

Fig. 7.—Bracing by means of wooden props. This is a three-year-old Paloro peach
tree which bore a crop at the rate of seven tons per acre at this age.

Under some conditions the costs may be partially or wholly offset by
the sale of wood for domestic purposes, three mature peach trees giving
approximately one tier. Such a tier may cost from $2.25 to $3.00 for
pulling and cutting combined, and has a sales value of from $2.00 to
$3.50
16 Unpublished costs supplied by E. F. Serr, Assistant Farm Advisor of Sutter
County.