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Updated: May 12, 2025
The weights of oxygen which combine with 4.66 parts by weight of nitrogen to form the second and third compounds, respectively, must be whole multiples of 2.66; these weights are 5.32 and 10.64. Now 5.32 = 2.66 x 2, and 10.64 = 2.66 x 4.
Like a tide from the plains of innocent heaven through the sultry passionate air of the world, came the coolness to his brow and heart. Oxygen, ozone, nitrogen, water, carbonic acid, is it? Doubtless and other things, perhaps, which chemistry cannot detect.
They have been through high-school and college training, they have learned the properties of oxygen, nitrogen, and carbonic-acid gas, and have seen a mouse die under an exhausted receiver, and of course they know that foul, unventilated rooms are bad for the health; and yet generation after generation of men so taught and trained will spend the greater part of their lives in rooms notorious for their close and impure air, without so much as an attempt to remedy the evil.
That this will be done in the near future by electric forces, and with such economy as to make the product available for agricultural purposes, is reasonably sure. In the meantime we must use the vetches, peas, beans, and clovers which are such willing workers. The legumes fulfil the three requisites of the cover crop: protection, humus, and the storing of nitrogen.
The only plants which are of use in this green manuring are those which can, through the agency of bacteria, obtain nitrogen from the air and store it in their roots. Second, after the crop is ploughed into the soil various decomposing bacteria seize upon it, pulling the compounds to pieces.
There is no reason to be afraid of too much fertilizer, provided it is evenly distributed and thoroughly mixed through properly prepared soil. Stinginess in this item is poor economy. Nitrogen is the most essential food for plant growth. It is an important element of plant food in manure.
It may be found advantageous to dispose of the right to surplus power separately with such reservations as will allow its gradual withdrawal and application to nitrogen manufacture. A subcommittee of the Committees on Agriculture should investigate this field and negotiate with prospective purchasers.
Take the simple fact that cowpeas gather nitrogen from the air: a man may harness this scientific truth, use it and set it to work, and get results, profits, power, from it, as surely as from a harnessed horse or steam engine. And so with every other useful bit of knowledge under heaven. Knowledge is power. "Elephints a-pilin' teak In the sludgy, squdgy creek"
These statements are not mere opinions, but determined facts whose accuracy stands unquestioned. On another field at Rothamsted, England, the average yield of barley for the same sixty years was 43 bushels an acre where nitrogen, phosphorus and calcium were regularly applied, 42.6 where all five elements including potassium and magnesium were added, but only 14.3 on unfertilized land.
Cheese, on the contrary, is rich in nitrogen. Food which contains much fatty matter, or substances which in the animal system are readily converted into fat, will tend to increase the proportion of cream in milk. On the other hand, the proportion of caseine or cheesy matter in milk is increased by the use of highly nitrogenized food.
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