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Grass Seedling Response to Wind and Windblown Sand¹

Rangeland glasses are difficult to establish on sandy soils because blowing sand can kill young seedlings. Four grass species, sideoats grama [Boitteloua curtipendula (Michx.) Torr.], cane bluestem [Bothriochloa barbinodis (Lag.) Herter], green sprangletop [Leptochloa dubia (H.B.K.) Nees], and sand bluestem (Andropogon hallii Hack.) were grown in a greenhouse and subjected to wind and wind with sand in a laboratory wind tunnel. The blowing sand killed the seedlings or retarded their growth, but wind alone had little influence. With increasing age, the young grass plants became more tolerant to wind and sand damage. Plant growth was slowed because the blowing sand ruptured plant cells, dried out the exposed tissue, and exposed the damaged seedlings to diseases and insects.

Key Words: Wind erosion • Abrasive injury • Wind tunnel • Histology • Sideoats grama • Cane bluestem • Green sprangletop • Sand bluestem

² Agricultural Engineer, USDA, Big Spring, Texas; Assistant Range Scientist and Professor, Range Science Department, Texas A&M University, College Station, Texas.

Received for publication March 18, 1973.

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