10 BULLETIN 208, U. S. DEPARTMENT OF AGRICULTURE. 
It should be stated that this growth was not all from cuttings. 
About four rows of the old varietal plantings were preserved, and to 
this extent the crop was from stumps which had previously had a crop 
taken from them. The plantings here, as in the other cases at San 
Antonio, are made approximately 24 feet apart in 6-foot rows. The — 
varieties grown here are the same as those discussed in previous 
publications. Opuntia lindhevmeri has been the principal species, but 
there has been a small admixture of O. ferruginispina, O. sinclairii, 
and other less important species. 
In April, 1914, another harvesting of a representative area was made 
by cutting and weighing two 8-foot rows 416 feet long. The yield for 
the three-year period from the well-established stumps of the previous 
harvesting in 1910 was at the rate of 28 tons to the acre each year. 
During the season of 1910 this area was plowed with a turning plow 
and alice with a spike-tooth harrow three times, which, because 
of the harvesting and burning over of the previous anne, put the 
ground in fairly good condition, especially for the penetration of 
moisture. All the cultivation given consisted in going over the land 
two or three times with a spike-tooth harrow in 1911. The increase 
here over the other harvestings, due, it is believed, to the greater vigor 
of the old established plants, is striking. The beneficial effect of 
placing the land between the rows in good tilth, even if it be only once 
in four years, is also shown without doubt. Attention should be 
called to the fact that no handwork was done in this field after the 
planting. 
A summary of the conditions and of the yields of native prickly 
pear obtained at San Antonio is given in Table III. 
TaBie III].—Summary of yields of native prickly pear grown from cuttings or old ee 
at San Antoni, Tex. 
Character of Cuttings or 
cultivation. stumps. Species grown. 
Time harvested. 
Oetaber,: 1907. 4225 4-4425—5e = - NORG,. tscuiget =e = 5 Cuttings..... Opuntia lindheimeri. 
April and May, 1909. ..---.-.- Very ipoor.- 24: -2-2|s--.2 Onmenicees (2) Do. 
Aa O1OS 522 See se See dom. J32s2. 2 lees doc. oe=2 , Do. 
Lie yelny RiGee see ee akeee INONG so --Be ceee|2eee GOvae tess : Do. 
March, LOTS seh: ene eee (POOR -f pase eal ase doze 2222 ; Opuntia lindheimeri 
mostly. 
pag ord kt) Pee epee ae ee) (eye a Goss. car des Stumps:..::-- } Opuntia lindheimeri. 
Spring, DOTA SER Fo eee we Pra INONG Ae seis see 5a deere see f Do. 
1 Roughage for 1 cow on 14 acres. 
GENERAL CONDITIONS AFFECTING YIELDS. 
As shown by the figures cited, other conditions being equal, the 
yields of prickly gear at a particular place have generally been in 
direct proportion to the care given the plantation. The most potent 
factor after the plants are once thoroughly established is cultivation. 
