18 
Turning now to the detailed statement of the percentage of germina- 
tions secured for the respective methods of treatment, the following 
table gives the data obtained: 
Germination of oats treated with copper sulphate solutions for different periods. 
Be B z 
. a S a : 5 rS 
aS e | Paae es = ie Bll es 
s =i = S ras Pe ire) mo | oe 
S ds) sS ~ ~~ <=) =| 
z te a a 5 ny = 3 
Sr) fe) ss0H 0a SE a een eh a mea ee 
H is & | w op = A A i 
} 
Seed soaked for 15 minutes: IPS ets\ PAel. |-BxCt.\\ 2 ,Cby| les Cts |e1ebs| OP Ct \pla Cia PEeteyr 
Checke(unitreated)!=22-- 22.2. cereeenee 9 79 OH | Or 98 98 98 99 99 
Im Ots sper cent SOlUuiON-- )4242 sass 4. 9 72 93| 98 99 99 99 99} 100 
iGpercentisolmbioneie= =e sella elle 0 68 93 8 |) $Y 99 99 99 9 
PAPETGeNUSOMMION == a= ce sea eee 3 40 63 79 83 86 86 86 86 
SI PEMCentisOlubion= seme eee 3 43 60 85 89 89 89 89 | 89 
HypPeMeenib SOlMMONE sa e6 se seisereeee G 45 67 82 82 82 82 82 84 
HOppercentSOluvione ease. see occa ae 0 9 16 26 36 | 48 56 65 65 
Seed soaked for 30 minutes: 
Checka(untreated)Hasecas sae eese eo eeeee 16 84 97 98 99 99 99 99 99 
lin O35) OS CONG SSsscscoossqncosccgHcE soe 3 50 77 88 95 95 95 96 97 
iL USP COnH ROTI Secsetosaccnsyeadse 5 47 Gy) BY 89 92 93 94 94 
PD percent Soluvlonsss45-2 cess sees oe 0 8 eh Bil 360) 50) ees 64 72 
SIpPOMcenb SOlublONeses-iseseeeee es... - 0 5 22 OI a Bab Spa SP 32 39 
Sepericenv SOlMbIONsse eee seee n= eee 0 5 10 14 21 21 ol 21 26 
1® jreeCerty SOlOEHIOM see cogccécceedaoncs 0 0 2 5) 6 | 9) PS ale slo 19 
Seed soaked for 1 hour: | 
Ghecka(uutreabed) pete ee a eee 16 84 | 197 |) 98 99 Cy GB ee 99 
lon O35) jase Corp SOlTinOn -ooesaaonsocce ae 8 57 79 85 88 Qik jy Bl 93 94 
UpercentisolnbiOneseeee mises eee 0 17 45) 60 i7 85 | 85 86 88 
7) FOE OSH SOTHO NSeacses eodecsesosee 0 2 | 9 18 30)| 42) | 2 47a ess 54 
SPC Cents OlMbLONE apna eesere ys seer 0 il 5 | 15 24 | 32 34 37 37 
SI DCMCeMU SOLON Sas samara e ee See 0 4 7 | 9 Nee i 716) Ge Ty iG 
NOppericenbisolubioneessesssceee seen eee 0 2 4 8 10 aa 16 18 18 
Seed soaked for 2 hours: | 
@heeka(umibreave die sass8- secre s ee 8 | 64 96 99 99 99 og 99 99 
eng OsORpPeLICent SOlutioneees-e eee eee 2 | . 20 56 69 81 Si) |) - OF 96 | ,. 96 
DEP EIACeNbSOlbLOM == e eres e ee 0 9 25 37 56 66 81 Sl] : 98 
2 PeMcenU Solutions s.-cee see nc See 0 0 | 0 4 6 14 33 40 46 
Siper Cony SOlutiOn™ i440 ne sone seme nee 0 0 0 2 4 TG) IG 21 22 
F VSP CSMENO ION. s4g5cc5s55bcsaacase 0 0 | 0 | 0 1 4 | 4 6 7 
1Ompercent Solubiones. sesso ene 0) 0 | 0 0 1 i 2 | 2 3 
Seed soaked for 3 hours: 
Check (untreated) yaa. soa -5 seco ae sine 7d) WO. OF 99 99} 100/ 100} 100 100 
my Osh percent Solutionaessesssceee sere. PS AVES REE |e} 81 91 97 98 | , 99 
percent SOlublonessse-seece eee see 0 | 3 8 23 37 59 79 Bye teks) 
2 Per centisolubion ss4- eee sas sees 0 | 0 | 0 3 8 13 27 31 | j 41 
SPPeEICEN SOLON sass cesiee ee eee 0 | 0 0 0 3 7 16 18 23 
HIP CoMAnOlbION H-sseasosascoesau se 0 | 0 0 0 it 1 2 3 4 
1Ospericent solutionesces cece eee Mer 3G 0 0 2 2 4 4 4 
| 
From the foregoing table it will be seen that the germinative ability 
of the untreated seed was in excess of 99 per cent, and this figure is 
closely followed by the seed treated with 0.5 per cent and 1 per cent 
solutions for the various times of treatment. In the case of the seed 
soaked for fifteen minutes the germination of the check lot was sur- 
passed by the lot treated with the 0.5 per cent solution and equaled by 
that soaked in the 1 per cent solution. For the other times of treat- 
ment there was a slight falling off, as shown in the table. For the solu- 
tions stronger than 1 per cent the effect upon germination is shown in 
the rapidly decreasing percentages as the strengths of the solution or 
time of soaking is increased. 
The extent to which the treatment retards or prevents germination 
is also shown in the table. In the case of the check lots of seed prac- 
tically all germination was effected by the sixth day; on the other hand, 
