Table 1. Control and experimental planting sites on north Padre Island. 



Description 



Planting 

 dates 



Comments 



Unplanted control dune 



366-meter sea oats 



not 



planted 



Mar. 1969 



Dune-width extension. 

 Planted seaward of the 

 south end of monthly 

 plantings. 



335-meter bitter panicum 



Apr. 1973 



Feb. 1970 



366-meter bitter panicum 



Feb. 1972 



and 

 Apr. 1972 



Monitored since 1974. 



Original plantings — three- 

 fourths saltmeadow cord- 

 grass and one-fourth sea 

 oats. Survival — cordgrass, 

 14 percent; sea oats, 46 

 percent. Cattle grazing 

 an early problem. Supple- 

 mental fill-in plantings 

 of sea oats, cordgrass, 

 and panicum (shoredune and 

 bitter) . 



Mixture of 3:1 bitter 

 panicum to sea oats. 

 Survival — panicum, 62 

 percent; sea oats, 1 

 percent. 



Bitter panicum alternated 

 with sea oats seed. 

 Survival — panicum, 17 

 percent; sea oats, 

 unsuccessful. Subsequent 

 patchwork planting. 



North half planted with 

 bitter panicum — 76 percent 

 survival. South half 

 planted with sea oats, which 

 were later destroyed by 

 iackrabbits. Replanted in 

 April with bitter panicum — 

 17- percent survival. 



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