(d) ffangroves: 



(1) Red {Rhizophova mangle) 



(2) Black {Aviaennia gevminans) 



(3) White {Lagunoulavia vaaemosd) 



(e) Saltgrass (Distiahlis spiaata) 



(f) Seaside arrowgrass (Trigloahin mavitima) 



(g) Siltgrass (Paspatum vaginatum) 



V. FERTILIZATION 



Fertilization is recommended for all plantings subject to wave stress 

 except where previous experience has indicated it is not needed. Two general 

 types of fertilizer can be used — soluble or slow release. Soluble materials 

 should be broadcast and disked in before planting, spread in the planting 

 furrow, placed in a second hole beside the planting hole, or placed in the 

 bottom of the planting hole and covered with soil before the plant is 

 inserted. Slow-release materials, such as Osmocote or Mag Amp, should be 

 effective when applied in the planting hole or furrow. 



If soluble materials are used, they should be applied at a rate of 100 

 pounds per acre (1 kilonewton per hectare) of nitrogen (N) and 100 pounds per 

 acre of phosphate (^2^5) ^^ '^^"^^ °^ planting. In conventional mixed ferti- 

 lizers, the number designations such as 10-10-10 represent the percentages (by 

 weight) of nitrogen (N) , phosphate (P2O5), and potash (K2O ) , respectively, in 

 the mixture. Therefore, the amount of 10-10-10 fertilizer per acre needed to 

 provide 100 pounds of nitrogen and 100 pounds of phosphate would be 1,000 

 pounds. A topdressing of an additional 100 pounds per acre of soluble nitro- 

 gen (N), 6 to 8 weeks after planting, will be helpful on deficient sites and a 

 third 100-pound application 6 weeks later will be advisable on acutely defi- 

 cient sites. 



Slow-release materials, if used in lieu of soluble fertilizer, should be 

 applied at a rate of 100 pounds per acre of nitrogen at time of planting. 

 Slow-release materials should always be placed in the planting hole or 

 furrow. For conventional slow-release mixtures (14-14-14 or 16-8-12), about 

 0.5 ounce (15 grams) of fertilizer should be placed in each hole. When slow- 

 release materials are used, no additional applications are necessary during 

 the first growing season. 



If plant cover and development are not adequate by the second growing 

 season, fertilize again with 100 pounds of nitrogen using a soluble source 

 broadcast at low. tide in early spring. After establishment, the color of the 

 grass itself can be used as a general indicator of available nitrogen. Dark 

 green leaves indicate an adequate supply while lighter shades of green and 

 yellowing lower leaves during active growth result from too little nitrogen. 



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