1840 



ENCYCLOPEDIA OF rUACTICAL 1 lOKPU'l'LTritE 



Other questions arise, but tliese are suf- 

 ficient to show the importance of the sub- 

 ject. 



Various experiment stations have inves- 

 tigated this subject, among them the sta- 

 tions of Wisconsin, Illinois. Arizona, Ohio. 

 and the managers of the Wooilburn Fruit 

 Farm, in England. 



It was found that varieties differ 

 greatly, and that the same varieties dif- 



fered niiuh under different conditions of 

 soil. The greatest depths of roots ob- 

 served at the various places were as fol- 

 lows: Wisconsin, 9 feet; Illinois, 5 feet; 

 Arizona, 20 feet. 



More evidence was obtained at the 

 Pennsylvania Experiment Station in 

 1908, both with reference to root dis- 

 tribution and the horizontal and verticle 

 in each of 28 apple trees. 



It will be seen by this table that the 

 heaviest rooters are the Spy and the 

 Baldwin. It will also be noted that in 

 two varieties the feeding rootlets are, 

 some of them, at tlie surface not even 

 one Inch below, and that no variety starts 

 its feeding rootlets more than two inches 

 below the surface, while most of them 

 iitart one inch below. It would seem from 

 this table that unless it Is desired for 

 some reason to disturb the feeders, that 

 it is not best to cultivate more than one 

 Inch in depth. 



See Deep Plowing, under Cultivation of 

 the Apple Orchard, pp. 234, 236. 



Teach I^oots 

 In Ohio, the roots of the peach were 

 examined only to a depth of one foot; Init 



it is stated that In all cases studied, the 

 feeding roots were removed from the first 

 six inches of soil. 



Depth of Roots 

 Corn roots have been known to pene- 

 trate the soil to a depth of four feet. 

 On drier and deeper soils they went as 

 deep as eight feet. Perennial grasses 

 have been known to go as far as four feet 

 the first year, and five and a half the next 

 year. Potatoes, 3 feet; sugar beets, 4 

 feet; alfalfa, from 30 to 50 feet; grape 



vines, 22 feet. ^^ „, ^^ 



Dr. W. Prear, 



Colorado ,\gi'l(ultui'al College. 



Reduction or Waste in Marketing. 

 See p. 1327. 



RoxBURY Ai'i'i.E roi{ Ma.ssachusetts. See 

 Mass. 



