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Updated: June 14, 2025
You will welcome the information that the average yield of wheat on an Illinois experiment field down here in "Egypt," in a four-year rotation, including both cowpeas and clover, has been eleven and one-half bushels on unfertilized land, fourteen bushels where legume crops have been plowed under, and twenty-seven bushels where limestone and phosphorus have been added with the legume crops turned under; and that the aggregate value of the four crops, corn, oats, wheat, and clover, from another "Egyptian" farm, has been $25.97 per acre on unfertilized land, and $54.24 where limestone and phosphorus have been applied.
This means that the roots and stubble of a two-ton crop of clover would contain about forty pounds of nitrogen, or more than we assumed was taken from the soil by the cowpeas. But there is still another point in favor of the clover.
I remember you figured 86 pounds of nitrogen in two tons of cowpea hay, but you also assumed that about 29 pounds of it would be taken from the soil." "Yes, that is true," Percy replied, "at least 29 pounds and probably more. You see the cowpeas grow during the same months as corn and on land prepared in about the same manner.
They tell me that they used to grow lots of clover here; but it played out completely, and nobody sows clover now, except occasionally on an old feed lot which is rich enough to grow anything. It takes mighty good land to grow clover; but cowpeas are better for us.
If the soil will furnish 75 pounds of nitrogen to the corn crop, and 48 pounds to the oats and wheat, it would surely furnish 29 pounds to the cowpeas. Of course this particular amount has no special significance, but the other definite amounts removed in corn, oats, and wheat aggregate 171 and the 29 pounds were added to make the round 200 pounds.
Do not wait to put under the winter growth until it is safe to put on the cowpeas, for, if you do, you will lose so much moisture that the cowpeas will not amount to much. Handling Orchard Soil. We average about 35 inches of rainfall. With this heavy rainfall, is there any advantage to be gained by early plowing and clean cultivation right through the winter?
"Land that will furnish 48 pounds of nitrogen for a crop of oats or wheat will furnish more than 10 pounds for a crop of cowpeas. At the end of such a four-year rotation such a soil would be about 200 pounds poorer in nitrogen per acre than at the beginning, if all crops were removed and nothing returned." "How much would it cost to put that nitrogen back in commercial fertilizer?" asked Mr.
I planted cowpeas between peach trees which I have kept irrigated; when should they be plowed under?
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"
It should be plowed under for corn on one field early in May and two or three weeks later the other field is plowed for cowpeas. The spring growth should average nearly a ton of clover hay per acre. In this way clover equivalent to about three tons of hay could be plowed under.
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