OF BULLETINS OF THE AtllllCULTUIUL EXPERIMENT STATIONS IN THE, 

 UNITED STATES. 



Alabama College Station, Bulletin No. 14 (New Series), April, 1850 (pp. 40). 



Value of cow-pea vines and hoots as a fertilizer, N. T. 

 LuPTON, LL. 1). (pp. 5-9). 



Comparative manurial value of vines and roots. — " Four samples were 

 taken October, 18S9, from a crop raised on the experiment farm, as fol- 

 lows : Sample A was taken from a space 1 jard square. The vines 

 were carefully cut, leaving the usual amount of stubble with the roots. 

 A trench was dug around this square yard to a depth of several feet, 

 and the earth washed away by a stream of water from a suitable hose. 

 The roots were collected as completely as possible. Samples B, C, and 

 D were from a cubic foot each, selected at random iu the patch ; the 

 earth was entirely removed, dried, and then carefully sifted from the 

 roots. Care was taken to secure, as far as possible, all fibers, however 

 small. It was found that in this soil, a sandy loam with sandy subsoil, 

 the roots were virtually all included in the first foot in depth. Vines 

 and roots, with stubble attached, were air dried and weighed." 



The following table summarizes the weights of vines, and of stubble 

 and roots with adhering earth, as observed ; the weights for 1 acre as 

 estimated by multiplying these by the number of square yards or 

 square feet in an acre ; the percentages of the most valuable ingredients, 

 as shown by analysis; and the estimated weights of the same ingre- 

 dients per acre : 



Weights and composition of vines, roots, etc. 



Weights per plat, aa observed.. grains 

 Estimated weights per acre ...pounds 

 Results of analysis : 



Moisture per ceut 



Crude ash do.. 



Phosphoric acid do.. 



Potash do . . 



Nitrogen do.. 



Valuable fertilizing ingredients in one 

 acre, estimated: 



Phosphoric acid pounds 



Potash .-.do. . 



Nitrogen do.. 



Vines. 



210 

 2,236 



11.79 



14. 37 



1.03 



1.24 



2.62 



23.03 

 27.72 

 58.58 



Hoots 



and 



stubble. 



Roots I 



Vines. I ai\d , Vines. 



stubble. 



67 137 

 713 13,128 



10.95 

 20.65 

 1.09 

 1.17 

 1.09 



10.49 

 8.87 

 0.56 

 1.25 

 1.73 



7. 77 I 73. 51 

 8.34 164.10 

 7.77 227.11 



20 

 1,916 



11.10 



23.54 



0.56 



1.11 



0.75 



10.72 

 21.26 

 14.37 



58 

 5,558 



11.48 

 7.81 

 0.55 

 1.33 

 1.45 



30.56 

 74.10 

 80.59 



Roots 



and 



stubble. 



11 

 1,054 



9.05 

 18.18 

 0.62 

 1.24 

 0.54 



6.53 

 13.06 

 5.69 



D. 



] Roots 

 Vines.] and 

 Istubble. 



69 

 6,612 



11.04 

 7.31 

 0.44 

 1.35 

 1.45 



29.09 

 89. 26 

 95.87 



9 53 

 17.53 

 0.30 

 1.14 

 0.36 



2.58 

 9.82 

 3.10 



141 



