g. Fertilization Requirements . Fertilization is recommended for all 

 shore stabilization plantings except where previous experience has shown it to 

 be unneeded. 



Apply 1 to 3 kilonewtons of nitrogen (N) and 1 kilonewton of phosphate 

 (PoOc) per hectare from soluble sources (ammonium sulfate and concentrated 

 superphosphate, or diammonium phosphate) or in slow-release materials such as 

 osmocote or mag-amp (see Sec. V for details on types, placement, application 

 rates, and maintenance of fertilizer). 



h. Planting Maintenance . Utter such as wood, styrofoam, algae, and 

 dislodged submerged plants may accumulate in the planting areas and form a 

 debris line. This material will smother and damage plantings particularly 

 during the first two growing seasons. The debris should be removed in both 

 the fall and spring. 



Canada and Snow geese are fond of the tender roots and rhizomes of marsh 

 plants and may destroy a planted area before the plants are well established 

 in areas of high winter waterfowl concentrations. Rope fences erected on the 

 seaward edge of planted areas (Fig. 23) have been used successfully to exclude 

 waterfowl during the first few growing seasons. The fences consist of wood, 

 metal, or plastic pickets strung with nylon rope, spaced at 15-centimeter 

 intervals from the sediment surface to the high tide level (Garbisch, personal 

 communication, 1977). 



Figure 23. Nylon rope fence around smooth cordgrass planting. 



Severe storms may cause damage to plantings particularly during the estab- 

 lishment period. Damage areas should be replanted. 



55 



