The claim of the antifertilizer cult that insects and diseases tend to ignore crops grown their "natural" way, and concentrate on chemically fertilized crops, I leave to your imagination. No reputable scientist has yet reported any such observation. But H.E. Myers, head, department of agronomy, Kansas State College, observed this spring on an experimental field in Southern Kansas that green bugs were exceedingly numerous on non-fertilized wheat, while only a few were present on adjoining wheat receiving nitrogen and phosphorus as chemical fertilizers.
The indictment that mineral fertilizers destroy earthworms and beneficial soil bacteria is without foundation. At the Rothamsted Experimental Station, it has been found that earthworms are just as numerous in the soil of the fertilized plots as in the unfertilized - but those in the fertilized area are larger and fatter. Many experiments in this country show that application of superphosphate to soils at rates commonly recommended will increase the population of beneficial soil bacteria. The use of mineral fertilizer will, in general, result in an increase of the organic matter of the soil and thus promote bacteria and earthworms. Organic matter is, of course, a by-product of plant growth; one of the quickest ways to increase it in a soil is to use chemical fertilizer to grow luxuriant green manure crops that will be turned back in the soil, or heavy crops that will leave a large residue of organic material. Without the use of chemical fertilizer it is impossible on some soils to grow legumes that are so essential to good soil management in humid sections. On the gray silt loam soils of South-eastern Kansas, farmers could not grow alfalfa successfully, even though they used large quantities of manure. Fertility experiments on these soils showed that over a 24-year period, the average annual yield of alfalfa on untreated land was only .59, of a ton per acre, while the addition of lime and superphosphate enabled the land to produce an average yield of 2.29, tons. On this land the lime and superphosphate treatment increased the average yield of wheat from 14.6 bushels per acre to 26.3 bushels. Although the purely organic manure was beneficial on these soils, manure alone could not solve the problem of a definite lack of lime and phosphorus.
To sum it up, there is nothing to substantiate the claims of the organic-farming cult. Mineral fertilizers, lime and organic matter all are essential in a sound fertility program. Chemical fertilizers stand between us and hunger.