Abstract:
STABILIZED SHOULDERS WERE BUILT ON FOUR PROJECTS ON LONG ISLAND IN 1945 AND 1946, AND SEEDED WITH ABOUT 50 DIFFERENT KINDS OF GRASSES, GRAINS, LEGUMES AND OTHER PLANTS TO INVESTIGATE THE FEASIBILITY OF GROWING VEGETATION ON SUCH SHOULDERS. DETAILS OF THE CONSTRUCTION ARE GIVEN AND THE RESULTS TO DATE ARE DISCUSSED. IT IS INDICATED THAT VEGETATION CAN BE GROWN ON MECHANICALLY STABILIZED SHOULDERS, WHICH WILL SUPPORT OCCASIONAL USE BY TRAFFIC. THE PLANTS RATED BEST AFTER TWO SEASONS ARE RED FESCUE, SMOOTH BROME, ORCHARD GRASS, REDTOP, PERENNIAL RYE, WILD WHITE CLOVER, BIRDSFOOT TREFOIL, GRIM ALFAFA AND YARROW. AN INTERESTING OBSERVATION IS THAT MANY PRACTICES SUCH AS ROLLING AND RAKING, USUALLY CONSIDERED ESSENTIAL, MAY BE ELIMINATED IN THIS SHOULDER WORK. THE SOIL WAS SANDY WITH APPROXIMATELY LESS THAN 5 PERCENT PASSING THE NO. 100 SIEVE. THE STABILIZING PROCESS CONSISTED GENERALLY IN ADDING ABOUT 1 IN. OF BINDER SOIL CONTAINING APPROXIMATELY 10 PERCENT PASSING THE NO. 200 SIEVE AND MIXING WITH 6 IN. OF THE SOIL IN PLACE. AVERAGE DRY DENSITIES IN THE TOP 6 IN. RANGED APPROXIMATELY FROM 116 TO 132 LB PER CU FT. /AUTHOR/
Supplemental Notes:
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