10 



BULLETIN 705, U. S. DEPARTMENT OF AGRICULTURE. 



From Table IV it will be seen that farm income was 6.6 per cent of 

 the capital invested in the group of clay farms having an income of 

 $77 per productive animal unit as compared with 2.87 per cent in 

 the group of farms having but $29 income per productive animal 

 unit. Like\^^se the group of silt loam farms having an average 

 income of $82 per productive animal unit made 8.92 per cent as 

 compared with 4.41 per cent for the group having but $29 income 

 per productive animal unit. Evidently, farm efficiency on both the 

 clay and silt loam soils was greater where the income per productive 

 animal unit was greater. 



Securing a high income per productive animal unit in the main 

 involves (1) the use of farm animals as scavengers to consume all 

 feed that would otherwise go to waste; (2) economical and efficient 

 feeding; (3) the breeding up of animals which will sell well and use 

 feed economically; and (4) the use of good business judgment in 

 marketing. 



The variation in the percentage farm income is of capital in the 

 different groups of farms in Table IV was partly due to a variation 

 in crop yields, for it will be seen that the groups of farms having the 

 highest income per productive animal unit also had the highest crop in- 

 dex. Especially is this true with the groups of siltloamf arms where the 

 crop index varies from 89 in the group of farms receiving $29 per 

 productive animal unit to 110 in the group receiving $82 per pro- 

 ductive animal unit. On the clay soil the influence of crop yields 

 was not so prominent, since the variation in crop index only ranged 

 from 96 in the group of farms receiving $29 per productive animal 

 imit to 102 in the group receiving $77 per productive animal unit. 



CROP YIELDS. 



In Table V the farms are divided into groups according to crop 

 index. The crop index of the clay farms is based entirely upon the 

 68 clay farm records. Likewise, the crop index of the silt loam 

 farms is based only upon the 144 silt loam farm records. 



Table V. — Relation of aop yields to percentage farm income is of capital on 212 farms 

 in Marion and Polk Counties, Oreg. {1912). 



Item. 



Salem clay. 



Crop 

 index 91 

 and less. 



Crop 



inde.x 92 



to 106. 



Crop 

 index 107 

 and over. 



Silt loam. 



Crop 

 index S9 

 and less. 



Crop 



index 90 



to 109. 



Crop 

 index 110 

 and over. 



Number of farms 



Average crop index 



Income per productive animal unit. 



Capital (average) 



Farm income ( average) 



Percentage farm income is of capital 



2.3 



79 



$40 



824,764 



$G.")3 



2.64 



23 



99 



S55 



$22,021 



81,085 



4.93 



22 



118 



859 



828,472 



81,.'J96 



5.61 



43 



76 



843 



1,630 



$746 



3.44 



50 

 101 



$55 



821,798 



81,485 



6.81 



51 



124 



866 



820,975 



31,940 



9.25 



