COST OF SEED OF GREEN-MANURE CROPS. 33 
TaBLE I[V.—Seed production per acre of various legumes at Chico, Cal., 1909. Plats 
one-twentieth acre. 
: Rate of Yield 
~ Name. | seeding. | of seed. 
Pounds. | Pounds. 
INEYOVES (E07 1G aE ey SEE CHC S Ne RP Sar SR ER ERE gee et BE ad Ae a eR 72 210 
PRAT PICEA Cate etree asaya ee as Se EA rine Soles gate Rae Rope i a ae ee UN 17 | 630 
CMU RER eee n sen eiee ces anes 5 ane EE eee anne era se se Sac ae Cae a 28 | 490 
IBC EIU RCC Keer ee een ala rea 8, ae PN ena NSS U2 Sedan 2 APL Yu 21 490 
TEUBYES SSS RARNETE Vi IDA ac ee le Re alr ni ea Cen gee Aaa ea ie ee Re 48 600 
BIC ka LGLCraVeLGh ea ates fase ie Gl He an are eee ae ne ere ees 45 1, 800 
IBIACKsbIGGeRVeLChe. ssmrs Shek 2 Sie OS ee a eee a ede Dee ea Bee Stain 76 1, 980 
Black-purple vetch...--..--5.-=-4-.- adecboneslccfercococeescgeagsesslees seces ee seneee|| 58 300 
IBlack=punplecvelch sass. ssa) Se Soa eee eee Sp cduCCadeE ee ieee ee | 36 | 380 
IBIACK= Up leave t@ hier ees- per copay ete a eg eg ee Ee IE | 36 580 
EIACK=PUnDICMMeLC eee aioe ae ae a a ee ern ee ee enya Rene Seo 48 400 
Nioolly=nod deduvetchs sect sha. Secs eiare o5e e ce ee aha caps eee eae cy eas has Ces | 45 290 
In Table IV is presented the seed yield of various new green-manure 
crops discussed in this bulletin. These yields were taken from 5-acre 
plats that had been sown primarily for a green-manure crop test 
and not for seed production. So the yields in some instances are 
much lighter than would have been the case had the crop been sown - 
for seed. 
It is quite probable that at Chico, where these crops were grown, 
conditions are not so favorable for the seed production of such plants 
as the woolly-podded vetch and the black-purple vetch as are the 
conditions in western Oregon, where seed of common vetch and hairy 
vetch is grown commercially. This is probably also true of the Tan- 
gier pea, though not so much so of the black bitter vetch, which 
does well at Chico. The yields presented in the table and the gen- 
eral character of the crops indicate that seed should be produced 
as cheaply as that of common and of hairy vetch, and in the case of 
black bitter vetch somewhat more cheaply. The seeding habits of 
black bitter vetch are such that an orchardist could easily raise his 
own seed if necessary, and where it is desirable to grow some crop 
in a young orchard he might raise the seed with profit. 
Of the crops mentioned, the production of seed will cost most 
with the Tangier pea and the woolly-podded vetch, and least with 
the black bitter vetch. The cost of seed of common vetch and field 
peas varies from year to year. Seed of common vetch during the 
past few years has varied from 34 to 5 cents per pound. When 
seeding at the rate of 60 pounds to the acre this would make the 
cost of seed from $2.10 to $3 per acre. 
Seed of field peas has been about the same price per pound as 
that of common vetch, but as 80 pounds of seed per acre are needed 
in seeding, this makes the cost from $2.80 to $4 per acre. 
Bur clover seed is advertised at from 25 to 30 cents per pound, 
hulled. When seeding at the rate of 20 pounds of seed per acre this 
makes the cost of seed from $5 to $6 per acre. 
190 
