Ss 
THE EFFECTIVE USE OF LAND AS SHOWN BY YIELD 15 
TREND OF WHEAT YIELDS IN CERTAIN COUNTRIES CHARACTERIZED BY COM- 
PARATIVELY LOW YIELDS 
Figure 6 shows the trend of wheat yields in Australia, Canada, 
Argentina, and India. Extensive production methods still predomi- 
nate in the grain-growing areas of the first three of these countries. 
WHEAT. YIELD PER ACRE 
5-YEAR MOVING AVERAGE, 1880-i923 
BUSHELS 
20 
15 
1 0 3 Australia 
o 1860 «1885)~=— ss i880.——«ii89S~=— i900=Ss 1905 ~—s i910 iSt5 1920 1925 
Fie. 6.—During the period of greatest expansion of the wheat area in Australia acre- 
yields continued to fall. Since the beginning of the twentieth century the general 
trend has been upward. In Canada when the wheat area spread into the drier lands 
oz the West during the war acre-yields declined rapidly 
TABLE 4—Wheat: Five-year moving eaeverage of yield per acre for various 
countries, 1880-1923 
| 
Year aes coma eee India Year ae aul nen | India 
: | 
Bushels | Bushels| Bushels| Bushels Bushels | Bushels | Bushels | Bushels 
111) Wen aes Eee VO Ie Wane S| ee i TOPE Sms Oh Ey ok lye fig bre ties | eee 10. 4 11.4 
ISS ea ee eee to ic eae at | [ee rn (ORES Sera es (Ovo scence aa SiO) eee 10.5 | ih By. 
Pepgetae ek: Ltt 4 Seip bad Leh | [ke tee Se Sees eae 1OGae oct CP GETS Ee ety Lue bk | 11.3 11.4 
ASRS = tenes tenes "ola [atari St Uae a pt Pe ie He 1905 Re Spee. 1085 aes ees ale 7 11.9 
1S84ee on PS Del Li? thee ey |e ale | cyanea GOB Seren toe cat LORDS eae 11.4 1153 
15's eae eR lager laa 2): yh Skea (ae bea ee MOO Tae eS Buk 1b Bs eee oe 10. 7 11.0 
Ahets! tp ee ee Ces tote vite femme | | SAL cee ee Supe ae OOS et meee ko De DG |e eee TORY, 11.5 
IBRROS pest Saewe CiOk felts Ve eS Lee TS LGOOS VAT Tk gh es es hee A 22S 10. 4 11.6 
DSSS ie ee = GaO Pes ce vale bt pene|) Se sn GUO Cake Se peers | 12. 1 18.9 9.9 11.6 
i choke ae ae ee eee {Side | aka ea oe | tia is aes ee a NG [ilps ee a 12.0 19.7 9.1 12.0 
S90 Ae eae tet) | [bee ee oe [eee ee ees See HOLD tink cares 2k | 9.7 18. 6 9.5 12.0 
TSO Ley eee ce OR (peste wh a en eee ee TOTS een a enter hie 10.0 20. 8 9.7 11.8 
ASOD ase Gas = ye SAGy |S see est 13.4 OFAP ELIA eee Slee LON 20. 0 8.8 11.5 
1Q93 45 See ee 7s een pee 12.9 Or4a | VOT heats eee 10. 6 19.1 9. 2 11.4 
USO ee sie deouloe seas, 11.7 9.1 NOG1G2 See ees ee 10.3 Wal 10.0 DEE 
1805 See ee (a a7 A | 10. 4 OeAS LOR ates Se 11.8 16. 0 10. 3 11.2 
COG Meee ree 633) (22 be 9.5 9.5 aICo oy canes Sa oe 10. 4 1B) ¥/ 10. 4 11.4 
TSO FP Res eee (S74 |e See a 9.5 9.7 (OlO eeht ieee 11.0 12. 8 12.0 11.2 
SOR ae ee = Se Qe ee Ue 9.7 TOSOn 81 920 ee ee ee 11.3 118}. 11.8 11.5 
doit 0 ER ee SOS ae At 10.0 10.5 POD Te) eOa el ee Seo ibs 15.0 12.5 11.8 
TOO eee! att GA Giles 10. 7 10.5 1922 ive is urs 12: 2 15. 4 12.2 11.8 
PO a eee ete Se 7 facial bee as meee tg 10. 4 NOEQ \PLO23e— 2 = were 13.0 16.1 1s) 11.3 
