There are in all cultivated soils forms of bacteria which are capable of forcing the inert free nitrogen to combine with other elements into compounds assimilable by plants.
Certain it is that though the unprejudiced must admit that exclusion has not been at all an unmixed blessing, yet the consensus of opinion is that a large population, non-citizen and non-assimilable, sending - it is said - most of their earnings to China, living in the main meanly at best, and practically without wives, children or homes, is socially and economically a menace outweighing the undoubted convenience of cheaper (and frequently more trustworthy) menial labour than the other population affords.
On the ground that the assimilable nutriment from a given weight of selected fruit and grain and nut and vegetable foods will cost less than the same nutriment obtained from flesh foods.
How would you define assimilable? Add your definition here.