Table 43. Percent survival of vertical plantings on Padre Island. 





Planting date 



Sample size 1 



Sea oats 



Bitter panicum 



1973 



Irrigated 



Nonirrigated 



Irrigated 



Nonirrigated 



North Padre 



9 Jan. 



50 



38 



26 



28 



10 



19 Feb. 



50 



56 



60 



66 



34 



15 Mar. 



50 











60 



62 



15 Mar. 



500 



.... 



.... 



53 



42 



14 Apr. 



50 



42 



34 



68 



68 



13 May 



50 



26 



8 



56 



70 



14 June 



100 



9 



18 



75 



78 



15 July 



100 



38 



37 



94 



93 



Total 2 





28 



26 



60 



53 



South Padre 



7 Jan. 



42 



54 



43 



44 



40 



17 Feb. 



42 



54 



81 



32 



33 



1 Mar. 



300 



25 



29 



35 



39 



29 Mar. 



50 



10 







44 



38 



29 Apr. 



50 



38 



4 



78 



46 



31 May 



100 



1 



15 



46 



40 



23 June 



100 



46 



41 



93 



97 



Total 



684 



28 



29 



49 



48 



1. Each column. 



2. N (sea oats) = 450 each; N (panicum) 



950 each. 



Table 44. Effect of heavy irrigation on survival of transplants on north Padre Island. 



Planting date 



Irrigation, 15 to 24 July 



July 



Total 3 



Percent survival 



15 July 1973 



Pump-hours 



Artificial precipitation 2 

 (inches) 



Rainfall 

 (inches) 



Precipitation 

 (inches) 



Sea oats 



Bitter panicum 



Irrigated 

 Nonirrigated 



31.5 



8.8 



1.0 

 1.0 



9.8 



1.0 



38 



37 



94 

 93 



1. N = 100 plants. 



2. Irrigation system watered at equivalent precipitation rate of 0.28 inches per hour. 



3. Irrigation plus rainfall. 



133 



