Published online by Cambridge University Press: 27 March 2009
1. Wheats from manurial trials, whose nitrogen contents differed by reason of the fertilizer treatment applied, have been used as the sole source of protein in rat-feeding experiments.
2. Pairs of rats given such diets have shown increased growth when fed wheat of higher nitrogen content.
3. Measurement of the ratio of growth rate to nitrogen ingested, suggests that the difference obtained is due, not to increase in the acceptability of the diet, but to the greater nutritive value of the grain from the manurial plots.