8 BULLETIN 806, U. S..DEPARTMENT OF AGRICULTURE. 
selection of such as are well suited to the principal types of vine- 
yard soil. | 
All the districts in California in which grapes for various pur- 
poses are now grown appear to have suitable conditions for the 
growing of currant grapes. The fruit of the same Vinifera varieties, 
when grown in some of the bay counties of California, is of finer 
quality than when grown in the San Joaquin Valley, and it is rea- 
sonable to suppose that the same may be true of the Panariti variety. 
It is, of course, a great advantage in growing grapes for drying 
purposes to be in a district which permits sun drying. Protection 
against the dew at night will probably be necessary in some of the 
coast districts, but it is preferable that the currant grapes be shaded 
most of the time while drying and the same shelter can be made to 
answer both purposes. 
ANALYSIS OF THE SOIL OF THE FRESNO EXPERIMENT 
VINEYARD. 
Because most of the investigations of the currant grapes have been 
made at the Fresno Experiment Vineyard of the United States De- 
partment of Agriculture, 3 miles east of Fresno, Calif., the mechani- 
cal analysis of the soil of that locality, made by the Bureau of Soils 
of the United States Department of Agriculture, will be of interest. 
(Table II.) 
TaBLE I1.—Analysis of the soil of the Fresno Experiment Vineyard, near 
Fresno, Calif. 
Mechanical constituents (per cent). 
F | Medium| Fine | Very : ee 
Coarse | gravel | sand. | Sand | sand. fnesand) «G40 | 6.006 
gravel. oe ee 0.2 to 0.1 : 5 0.005 a a 
Cae a2 | oIATTA 5) oy |e TTT) alee) mim): | Smaller). 
Description and depth of 
soil. 
Brown sandy loam: | 
OjtorZan chest eae | 0: £8 1.2 9.8 6.7 ~ 18.4 12.0 Bo 19.7 
12 toe NCHeS =. ee | 7 9 9.1 6.9 17.8 12.3 B2e0 21.4 
Sandy loam: - pe| 
24 TOs GANCheSes see ee | Roll 6 8.3 7.8 19.9 12.9 felt 23.5 
36 to 48ineches..-.__....-- | . 35 .9 8.8 6.0 ils 7 igi 36.3 21.4 
Free sandy loam: 
AS TOL IN ChHeSE sane eee pif) sy: aes 8.6 22.4 15.7 | 26.5 iL deall 
Of this type of soil about 75,000 acres near Fresno, 6,000 acres near 
Stockton, and about 265,000 acres in the Sacramento Valley have 
been mapped by the Bureau of Soils. For further descriptions of 
these soils, see Bureau of Plant Industry Bulletin 172, entitled 
“Grape Investigations in the Vinifera Regions of the United States 
with Reference to Resistant Stocks, Direct Producers. and Vinif- 
eras,” and the surveys of the Bureau of Soils. 
» 
