11. Profitable utilization of spots of poor soil. 



12. Sale value of the farm. 



"All the foregoing advantages may be had from a grove 

 set out with the initial idea of a wind-break about the build- 

 ings. All save the first two will accrue in some degree from 

 woods elsewhere on the farm if the location be chosen with 

 care. The sale value of a farm will be increased in propor- 

 tion to the degree in which the other advantages are present." 



Much Has Been Done. 



Much has been written on the value of planting woodlots. 

 Farmers of Minnesota will do well to study carefully the 

 entire proposition. They will then see the absolute necessity 

 of planting trees. Much has been done in Minnesota along 

 this very line. Much more can be done and will be done. 



The national forest service is responsible for the following 

 "Tree Planters' Decalogue." It condenses the best of advice 

 for the farmers of the state who are now wondering how 

 they could have increased the yield on their farms. 



The Decalogue. 



I. Place the wind-break at right angles to the direction of 

 injurious prevailing winds. 



II. Devote from one-eighth to one-fifth of the farm to tim- 

 ber. Its protective value more than pays for the ground it 

 occupies, to say nothing of the timber yield. 



III. Plant only species suited to wind-break use, to the re- 

 gion and to the locality. 



IV. Plant rapid growers for quick results; but underplant 

 with slower growing species, which are usually longer-lived 

 and more valuable. 



V. Supplement a deciduous wind-break with evergreens to 

 afford protection in winter. 



VI. Separate trees by the spacing proper to the species 

 used. The trees should be close enough to produce a dense 

 wind-break and to yield good poles, but should not be so 

 crowded as to produce spindling growth. 



24 



