THE FOREST ATION PROBLEM 8 1 



cast before felling; debris regulariy distributed after exploita- 

 tion; cost 14.40 francs ($2.78). 



3. Debris distributed and burned; 15 kilos (33 pounds) of 

 aleppo-pine seed then sowed; cost 21.90 francs ($4.23). 



4. Special manuring and sowing; too expensive to be prac- 

 tical; cost 78.05 francs ($15.06). 



5. After felling, strips 5 metres (5.5 yards) wide and 5 metres 

 (5.5 yards) apart were mattocked to a depth of 10 cm. (4 

 inches). Then 7 kilos (15 pounds) of aleppo-pine seed per hec- 

 tare (2.5 acres) were sown and covered with debris; cost 29.31 

 francs ($5.66). 



6. After felling, furrows were plowed 30 to 35 cm. (12 to 15 

 inches) wide and 5 metres (5.5 yards) apart; vegetation had 

 to be removed by hand before the ground could be plowed; 

 6 kilos (13 pounds) of aleppo-pine seed were then raked into 

 the soil and covered with debris; cost 23.31 francs ($4.50). 



7. Same as 6, only by seed spots 30 by 40 cm. (12 by 16 

 inches), 3 metres (3 yards) apart, and 25 to 30 cm. (10 to 12 

 inches) aleppo with 10 kilos (22 pounds) per hectare; cost 51.35 

 francs ($9.94). 



8. Similar to 4; cost 89.05 francs ($17.19). 



9. Exotics from Mexico were sown as in 5 and 7. The spe- 

 cies chosen were pinus eduHs, montezumae, pseudostrobus, and 

 patula. 



These experiments^^ are to be continued and in the official 

 records are shown graphically for each month, since the date 

 of sowing, on the basis of number of plants per seed spot, or 

 per square metre. The sowing took place under unfavorable 

 conditions, because in 19 10 there were no rains between May 

 and the end of December, when there was a heavy fall of snow, 

 so that germination did not commence until February and 

 March, 191 1; further germination took place in December, 191 1, 

 and January, 191 2, and after the rains at the end of August 

 and September, 191 2. 



The conservator has made the following deductions from the 



^ Statement and graphic records on cross-section paper by Conservator Laporte, 

 dated March, 1913. 



