List of Co-operative Experiments for 1907. 



75 



The general plan of work is mutual or co-operative, — the farmer to 

 provide land and labor, the expert to give advice and supervision and, 

 so far as possible, to inspect the work. In a few cases where seed and 

 materials cannot be readily purchased, they are furnished by the college. 

 The person on whose farm the experiment is made will receive most of 

 the benefit but we desire reports from each man so that the results may 

 be given to others. 



It will be impossible, of course, to serve everyone. We shall take 

 only as many experiments as we think we can handle satisfactorily. 

 Persons who desire to engage in this work must apply quickly. Full 

 instructions, together with blanks for the making of reports, will be sent 

 to applicants. 



AGRONOMY OR FIELD CROPS. 



G. F. Warren. 



One of the most important problems that confronts the New York 

 farmer is the growth of feeds that are high in protein. Nearly all farm- 

 ers produce enough carbohydrates for feeding their stock, but few pro- 

 duce enough protein. Corn, timothy hay, straw and mixed hay all con- 

 tain a small proportion of protein. To supply this deficiency, large quan- 

 tities of feeds high in protein are purchased each year. Those who wish 

 to try to grow feed to replace some of the purchased feeds will do well 

 to try one or more of experiments numbers loi to 109. 



The following table gives the number of pounds of digestible protein 



for each pound of digestible carbohydrates (+ 2^ times fat) in a few 



feeds. This is called the nutritive ratio. A ratio of i :6 means that the 



feed contains 6 pounds of digestible carbohydrates (or equivalent in fat) 



for each pound of digestible protein. A good ration for cows ordinarily 



contains protein and carbohydrates in about this proportion. It will be 



seen that the first five feeds contain enough or more than enough protein 



while the last five do not contain nearly a large enough proportion of 



protein: • '\ jj| ,'j ■• [J _J 



Dry Matter and Digestible Nutrients in 100 Pounds 



Dry matter. 



Protein. 



Carbo- 

 hydrates 

 + 2ixfat. 



Nutritive 

 ratio. 



Alfalfa hay 



Wheat bran 



Red clover hay 



Oat and pea hay 



Mangels 



Soy beans and com silage 



Com silage 



Corn stalks (no ears) .... 



Timothy hay 



Oat straw 



92 



88 



85 

 85 



9 



24 



21 

 60 

 87 



II 



12 



6 



7 

 I 



I 



3 

 I 



6 



•9 

 1-7 

 2.8 

 1 . 2 



42 

 45 

 39 

 38 



5 



14. 6 

 12.9 



34-0 

 46.5 

 40.4 



3 

 3 

 5 

 5 

 5 

 9 



1:14 

 1 :2o 

 1:16 

 I -33 



