Table 17. Effect of the fourth year of fertilizer^ on growth of 

 Spartina altemif lora a.t Ocracoke. Plots 4 by 25 feet, 

 three replications. (Harvested 19 September 1974) 









Aerial dry wt (kg/ha) 



N rate 







P rate 





(kg/ha) 







(kg/ha) 











74 



Average 









4,085 



3,831 



3,958 



168 





4,671 



8,592 



6,632 



336 





3,635 



11,192 



7,413 



672 





3,484 



17,029 



10,257 



Average 





3,969 



10,161 





LSD^ 











Nitrogen 



0.01 

 0.05 



1,573 

 1,133 







Phosphorus 



0.01 

 0.04 



1,112 

 801 







Nitrogen 



0.01 



2,224 







X 











Phorphorus 



0.05 



1,603 







CV3 



(%) 



13.0 















1. Nitrogen from ammonium sulfate and phosphorus from treble super- 

 phosphate applied in split applications in April, June, and 

 August of each year. 



2. Least significant difference. 



3. Coefficient of variation. 



64 



