206 



Affendix. 



Table I, Compiled from Tables I and II, Bulletin 60. 



Chemical analyses of cover crop plants. Shows date of seeding and taking 

 samples, j'ield of green tops and air-dry roots per acre, and amounts of nitro- 

 gen, potash and phosphoric acid in the different crops. 



CuwUoryi 

 turnips 



.Seed sown 



.Sample taken - 

 Lbs. green tops, 

 Ijbs. of air-dry j 



roots , 



Total yield 



Lbs. nitrogen • 



In tops ; 



In roots ' 



Total 



Lbs. potash ! 



In tops 



In roots 



Total 



Lbs. phos. acid 



In tops 



In roots 



Total 



July 22 



Nov. 1") 

 11,297 



*20,522 

 31,819 



64.4 



45.1 



lOiJ.5 



80.3 



62.3 



142.6 



14.3 

 11.7 

 26.0 



Rape 



July 22 



Nov. 16 

 26,620 



864 

 27,484 



116.2 



13.2 



161.3 



148.2 



13.1 



161.3 



41.8 



5.1 



46.9 



Crimnon 

 clover 



July 22 



Nov. 22 

 18,800 



413 

 19,213 



128.2 



6.2 



134.4 



84.0 

 4.2 



88.2 



59.2 



2.0 



61.2 



Red clorer Alfalfa 



July 22 I July 22 



Nov. 22 I Nov. 20 

 6,909 t 5,430 



Hairy 

 vetch 



1,212 

 8,121 



69.8 



33.2 



103.0 



46.5 



9.9 



56.4 



18.9 

 10.1 

 2V).0 



1,980 

 7,410 



54.8 

 40.4 

 95.2 



32.2 



9.5 



41.7 



13.1 



8.5 

 21.6 



July 22 

 Nov. 19 

 13,150 



600 

 13,750 



108.0 



13.2 



121.2 



78.4 



7.1 



85.5 



22.5 



4.7 

 27.2 



Cotvpeas 



July 22 



Nov. 7 



5,933 



394 

 6,327 



65.2 



4.3 



69.5 



47.4 



2.4 



49.8 



16.6 



2.3 



18.9 



Soy beans 



July 22 



Nov. 11 



10,952 



756 

 11,708 



130.9 



9.3 



140.2 



46.2 



1.8 

 48.0 



37.8 



2.4 



40.2 



*The turnip roots were weighed in their natural state just after being dug ; this is, 

 therefore, not air-dry weight. 



The results shown in this table are most interesting and instructive and 

 were discussed in the first part of this bulletin in the remarks on the various 

 cover crop plants. 



Table II, Compiled fhom Table II, Bulletin 60. 



Shows the dates of seeding and digging the roots, the air-dry weight of roots 

 in the surface 8 inches, the air-dry weight in the next 4 inches, and the total 

 air-dry weight of roots to a depth of 12 inches. 



Seed sown July 22 ! July 22 July 22 



Roots digged Nov.20 Nov. 22 Nov. 22 



Crimson ; j^^j cluver ', Al/aira 

 clover I 



Lbs. of roots in surface 8 inches__i 



libs, of roots in next 4 inches i 



Total roots in 12 inches 1 



381 



32 



413 



1,186 



27 



1,212 



1,972 



8 



1,980 



Na >ry 

 vetch 



Coicpeas 



July 22 July 22 July 22 

 Nov. 19 Nov. 7 Nov. 11 



Soy heana 



584 301 



16 93 



600 f 394 



71/ 

 756 



The great majority of the roots were in the first 8 inches of soil ; it was sup- 

 posed that a larger proportion would be in the 4 inches next below the first 8 

 inches. Consulting this table alone it would appear that the cowpeas are the 

 deepest rooted, since they have only a little more than three times as much 

 root in the surface 8 inches, as in the next 4 inches below. The crimson 

 clover follows with twelve times as much, soy beans eighteen times as much, 

 hairy vetch with thirty-six and one-half times as much, and red clover with 

 forty-four times as much root in the surface 8 inches as in the next 4 inches. 

 With the alfalfa only a small portion of the roots were found between 8 and 12 

 inches in depth. 



The alfalfa is noted as being a remarkably deep-rooted plant, and it cer- 

 tainly is so in many places, but these results show it to be shallow-rooted at 

 this Station. In a limited amount of digging here it was found that a very 



