MANURIAL VALUES OF FEEDING STUFFS 87 
highest manurial values. Where there is a choice between different 
feeding stuffs, the contents of valuable fertilizer ingredients in the 
feeds should receive careful consideration. By way of illustration 
we may bring together in a table some of the common feeding stuffs: 
Fertilizer Ingredients of Some Common Feeds Contained in One Ton 
Nitrogen P HoaGhore Potash 
Coarse Feeds: 
Timothy hay................. 19 7 28 
Corn fodder.................- 12 8 22 
Clover hay........ sodiaiaaoe itioscees 39 11 37 
Alfalfaiceccs <idck ox enate aetna a 44 10 34 
Concentrates: : 
Cotton-seed meal.............. 135 58 17 
Linseed meal (old-process) .... . 108 33 27 
Gluten meal....... scoomieh ashi nealark. 110 7 1; 
Dried brewers’ grains.......... 80 32 4 
Wheat bran................5. 53 58 32 
Indian corn................005 32 13 8 
We note that among the coarse feeds the legumes are richer than 
the grasses, not only in nitrogen, but also in potash, and slightly 
so in phosphoric acid. Cotton-seed meal, oil meal, and gluten meal, 
among the concentrates, are all high in nitrogen, but, unlike the 
first two, gluten meal is greatly deficient in both phosphoric acid 
and potash. Corn is very low in all three fertilizer ingredients, 
and brewers’ grains are low in phosphoric acid and potash, especially 
the latter. Feeds of high fertilizer values should, under otherwise 
similar conditions, be preferred to those of relatively low fertilizer 
value if they serve equally well the purpose in view. Corn is, there- 
fore, other things being equal, worth less to the farmer than is 
wheat bran, and linseed meal and cotton-seed meal are worth more 
than either. = 
Fertility Retained by Farm Animals.—The amounts of the 
fertilizer ingredients of feeding stuffs retained by farm. animals in 
their bodies or made use of in their products will vary with different | 
animals, and with the same animals at different periods of, growth. 
The following table? shows the proportions of nitrogen and ash 
constituents voided by animals or obtained in animal products, 
according to the English agricultural scientists, Lawes and Gilbert, 
of the Rothamsted Experiment Station: 
? Warington, “Chemistry of the Farm,” 21st edition, 1913, p. 214. 
