

Figure 18. Planting by hand. 



Machine planting, where feasible, can do a much more uniform job and is 

 far more economical than hand planting in large-scale planting (Fig 19) . 

 Tractor-drawn planters designed to transplant crop plants such as cabbage , 

 tomatoes, and tobacco are available in most regions. Although some may 

 require an alteration of the row opener for certain soils, they can often be 

 used without alteration. The principal barriers to machine planting are 

 usually inadequate traction on compact substrates, insufficient bearing 

 capacity on soft sites, or the presence of tree roots or stones that interfere 

 with the functioning of the row opener. 



Planting depth is not critical on sheltered sites. MDSt species will 

 develop satisfactorily when planted 2 to 5 centimeters deeper than their depth 

 when originally dug or removed from pots. However, in planting exposed 

 shores, it is often highly desirable to anticipate erosion or accretion trends 

 that are likely to prevail during the first month or two after planting. 

 Where erosion is expected, plants should be set even deeper than the 2- to 5- 

 centimeter depth. Where deposition is likely they should be set very close to 

 their original depth when dug or removed from pots. Woody vegetation such as 

 mangroves should not be set much lower than their growing depth. 



4. Summary . 



a. Principal Erosion Control Species ; 



( 1) Atlantic and gulf coasts 



attevniflova) . 



smooth cordgrass (Spartina 



(2) Southern Pacific coast 



fot-iosa) . 



Pacific cordgrass {Spavtina 



43 



