An oil spray of DDT was applied at the rate of five pounds per acre to a 90-acre tract of 5-year-old scrub and sapling growth at Beltsville, Maryland. Bird population studies were carried on in a 30-acre plot at the center of the sprayed area, and in a 30-acre check area of the same habitat one-half mile away. Of the five commonest species in the sprayed area, the Maryland yellowthroat, prairie

Authors

C.S. Robbins, R. E. Stewart

Ecosystems Mission Area, Eastern Ecological Science Center

January 1, 1949

Supplements to yellow corn for winter-maintenance and subsequent reproduction of quail

No abstract available.

Authors

R. B. Nestler

Ecosystems Mission Area, Eastern Ecological Science Center

January 1, 1949

The salt (sodium chloride) requirements of growing bobwhite quail

In the two experiments involving 452 bobwhite quail chicks, seven diets containing the following salt supplements, were compared: No additional salt; 0.25 per cent KaCl; 0.50 per cent NaC1; 0.75per cent NaCl; 1.00 per cent NaCl; 0.25 per cent Na2SO4; and 0.50 per cent KCl. All four diets containing sodium chloride gave about equal results in bird-growth, and produced better weights than the diet c

Authors

R. B. Nestler

Ecosystems Mission Area, Eastern Ecological Science Center

January 1, 1949

Vitamin A storage in wild quail and its possible significance

Livers of 445 wild bobwhites taken in Iowa, Wisconsin, and Illinois in late fall and winter of 1947-48 were assayed for vitamin A. All contained vitamin A; but the amount in many was so low that it is estimated that 4% of the birds would have died directly from lack of vitamin A within 3 weeks or that as much as 42% might have been affected enough to make them die from predation and severe weathe

Authors

R. B. Nestler, J.B. DeWitt, J.V. Derby

Ecosystems Mission Area, Eastern Ecological Science Center

January 1, 1949