METHODS OF PLANTING MOST SUITED TO ELOEIDA. 41 



In order to determine the number of plants necessary for any given 

 area with the different methods of planting, the following formulas 

 will be of use : 



I. When planted in squares -p = the number of plants required. 



S 



II. When planted in rectangles ^~ = the number of plants required. 



S 



III. When planted in triangles -p times 1.115 = the number of plants 



required. 



S= Number of square feet of the area to be planted. 



d=Number of feet of spacing from plant to plant in the row. 



e— Number of feet between rows. 



For example, 1 acre=43,560 square feet. 



If the square method is chosen and a spacing of 6 feet determined 



S 

 upon, then the number of plants required^ t^- 



Or substituting the real value in the formula : 



43560 43560 ' 



n 2 = qo = 1,210 plants. 



Staking. — Experiments in Brazil have shown that in moist tropical 

 countries the root system of the eucalyptus is superficial where the 

 trees are planted in very wet situations. In part this is because there 

 is at all times an abundance of moisture close to the surface, so the 

 roots do not have to go far in search of water. 



In places exposed to severe gales or heavy rains the plants are apt 

 to bend, and staking may be advisable. Staked trees, however, are 

 apt to grow tall and spindling and to lack the resistant fiber that is 

 developed by the mechanical action of the wind. Almost any kind of 

 wood will furnish stakes. The trees should be loosely tied to the 

 stakes with straw, tape, or soft cotton string. Supports add to the 

 expense of the plantation, and unless they are treated with some 

 antiseptic preservative, they soon rot and may be the means of intro- 

 ducing injurious insects or fungi. 



In Florida it will, as a rule, be advisable to plant closer, or to grow 

 some agricultural crop between the rows, instead of staking. 



COST OF PLANTING. 



There are no exact figures as to the cost of planting eucalyptus in 

 Florida. In California, however, extensive commercial plantations 

 have been made, and some idea of the cost may be obtained from the 

 experience there. In that State, from $15 to $50 per acre, with an 



