TREATMENT OF FOREST SEED-BEDS. 7 I 



period prevents surface concentration, and in practice has been 

 found entirely to prevent injury to the seedlings. 



The seed-beds should be watered frequently from the time 

 seed is sown until a few days after germination, when the root 

 tips have penetrated half an inch into the soil. The beds are 

 watered daily in ordinary weather, every other day in dull 

 or rainy weather, and twice daily when the maximum 

 temperature exceeds 80 degrees Fahr. 



Soil Treatment for Heavy Soils. 



1. Sulphuric Acid : ^^'^ fluid ounce per sq. foot of bed, dissolved 



in from i to 2 pints of water per sq. foot of bed, and 

 applied at once after the seed is sown and covered. 



2. Same treatment as (i), but use { ounce acid per sq. foot. 



3. Copper Sulphate : ^ avoirdupois ounce per sq. foot, dissolved 



in water and applied at once after the seed is sown and 

 covered. 



4. Same treatment as (3), but use ^^ ounce per sq. foot. 



5. Zinc Chloride : | ounce per sq. foot, dissolved in water and 



applied at once after the seed is sown and covered. 



6. Formaldehyde : ^ fluid ounce per sq. foot, dissolved in water 



and applied 10 days before the seed is sown. Keep the 

 beds covered with paper or light shade frames during 

 these 10 days. Do not spade up formaldehyde beds after 

 treatment; if necessary to cover the seed with soil from 

 outside the plot which has not been treated, use sub-soil 

 just dug up from at least i foot below the surface. 



7. Same treatment as (6), but apply the treatment only 3 days 



before sowing, and do not cover with paper. 



8. Air-slaked Lime : h ounce per sq. foot, applied dry and raked 



into upper 3 inches of soil before sowing the seed. (If 

 hydrated lime is used | ounce per sq. foot will be 

 sufficient). Immediately after seed is sown and covered 

 apply -3 ounce of sulphuric acid per sq. foot dissolved in 

 water. 



In dissolving disinfectants for heavy soils use sufficient water 

 to make from i to 2 pints of solution per sq. foot ; i pint is 

 generally sufficient when the soil is wet. « 



