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Articles 1381 - 1387 of 1387

Full-Text Articles in Ecology and Evolutionary Biology

Weather And Plant-Development Data As Determinants Of Grazing Periods On Mountain Range, David F. Costello, Raymond Price May 1939

Weather And Plant-Development Data As Determinants Of Grazing Periods On Mountain Range, David F. Costello, Raymond Price

Aspen Bibliography

Fundamental in economical range-resource management is the determination of proper grazing periods. It is of prime importance to be able to establish a date in the spring when the range has produced sufficient feed to keep livestock in thrifty condition, when it is reasonably safe from excessive trampling and packing of the soil, and when the more important key forage plants have attained sufficient development to withstand grazing use. Such opening dates, as well as the time to defer and rotate grazing and to remove livestock from the range, are dependent in part on the prevailing weather conditions and on …

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A List Of Birds Observed On The 1938 Semple Expedition To Northeastern México, George M. Sutton, Thomas D. Burleigh Apr 1939

A List Of Birds Observed On The 1938 Semple Expedition To Northeastern México, George M. Sutton, Thomas D. Burleigh

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

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A New Peromyscus From Texas, William B. Davis Feb 1939

A New Peromyscus From Texas, William B. Davis

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

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A New Grackle Of The Cassidix Mexicanus Group, George H. Lowery Jr. May 1938

A New Grackle Of The Cassidix Mexicanus Group, George H. Lowery Jr.

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

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Grazing Periods And Forage Production On The National Forests, Arthur W. Sampson, Harry E. Malmsten Sep 1926

Grazing Periods And Forage Production On The National Forests, Arthur W. Sampson, Harry E. Malmsten

Aspen Bibliography

Stockmen in the West have always had confidence in the adequacy of the native forage crop to provide pasturage for their livestock. Indeed, under normal climatic conditions this enormous natural resource has not failed the grazier, except where it has been called upon to meet unreasonable demands. The productivity of the range has declined sharply, however, wherever the requirements of plant growth have been disregarded for many years in succession. Where there has been too early or too frequent and to heavy grazing, undue trampling, or some other unsatisfactory feature of range use, the results have been uniformly bad. Many …

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Climate And Plant Growth In Certain Vegetative Associations, Arthur W. Sampson Oct 1918

Climate And Plant Growth In Certain Vegetative Associations, Arthur W. Sampson

Aspen Bibliography

The relation of climate to the growth and development of vegetation is of profound importance in both practical and experimental agriculture. It is extremely useful to know the cause of successful growth and establishment, or of partial success or failure, of various species in different plant associations and under widely contrasted climatic conditions. The climatic requirements of various plant types are largely responsible for the results obtained in the case of experimental seedings and plantings of most species. Once the adverse climatic factors are definitely known, failures with plants may be largely avoided by the judicious selection of sites or …

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The Story Of Aspen, Enos Mills Feb 1918

The Story Of Aspen, Enos Mills

Aspen Bibliography

No abstract provided.

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