Our Plants. ii 



try. They represent the average results of numer- 

 ous analyses, and are sufficiently accurate for all 

 practical purposes. The original analysis repre- 

 sented only the comparative proportions of differ- 

 ent foods as given in loo and i,ooo lb. With these 

 figures as a basis, I have estimated the number of 

 parts or pounds found in one ton (2,000 lb.) and 

 computed the animal food value per ton, estimating 

 albuminoids at $4, carbohydrates at 80 cents, fat at 

 $4 per hundred pounds. 



These estirnated values are obtained from the 

 average prices of the different grains in market, but 

 as the prices vary in different localities and in dif- 

 ferent seasons, they cannot be said to be absolutely 

 correct at all times. But they may serve to show 

 the relative values of the different kinds of feed and 

 forage. For instance, if the value of any one article 

 is too high or too low, then all the others are corre- 

 spondingly so. 



In calculating the value of the different grains 

 and forage crops as plant food, I have taken the 

 market price of nitrogen at 15 cents, phosphoric 

 acid at 6 cents, and potash at 5 cents per pound. * 



* These estimates were made for the first edition. At the 

 present time, nitrogen, phosphoric acid, and potash can be 

 bought in certain forms for about one cent cheaper per pound. 



