SUPPLYING THE HEAT 



Lettuce beds, during the winter months, should 

 be kept at a temperature ranging from 50 degrees 

 to 70 degrees. For radishes it may range from 

 40 degrees to 60 degrees; while for cucumbers and 

 tomatoes it must range decidedly higher, say from 

 70 degrees to 90 degrees, or even 100 degrees. 



In the spring of the year, it is quite a serious 

 task for a man to take charge of, say, 1,000 sashes, 

 with half a dozen different crops under them. He 

 must, of course, have a thorough understanding of 

 their requirements in respect to heat, moisture 

 and a variety of other conditions. He must be 

 a person of considerable experience or he cannot 

 be qualified to undertake the entire management 

 of crops so cultivated. It will be found that much 

 depends on their receiving the right care always 

 just at the right time. 



If the first crop is started in November or Decem- 

 ber, and the beds are properly handled, three and 

 sometimes even four crops may be taken from the 

 glass each season. In regard to the amount of 

 produce that can be taken off, per sash, each 

 season, of course much depends on skilful manage- 

 ment; but if the beds are properly attended to 

 (where three crops are grown) the results might, 



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