THE IERIGATION AGE. 



189 



Tree Planting Spring or Fall. 



BY W. PADDOCK. 

 State Agricultural College, Colorado. 



The question of tree planting is be- 

 ginning to be considered by many peo- 

 ple who have recently come to the state, 

 it' one may judge by the number of in- 

 quiries which are being received at the 

 Colorado Agricultural College, at Fort 

 Collins. 



In many of the eastern states, fall 

 planting of both large and small fruits 

 is much in favor. There are several 

 reasons for this preference, the most 

 important being that there is little or no 

 danger of either trees or soil becoming 

 dried out durinor the winter. Then, in 

 many locations, spring rains prevent 

 early working of the soil, so that it is 

 ol'ten late before planting can be begun. 

 But if the planting is done in the fall, 

 some of the plants may become partially 

 established, and, as the wet weather in 

 spring is favorable to growth, the fall 

 planted "trees have a great advantage. 



Under Colorado conditions quite the 

 reverse is usually true. A few people 

 have success with fall planting, but 

 they are the exception. 



Our fall weather is usually very dry, 

 and many of the ditches do not supply 

 late water, consequently i'all planted 

 trees usually experience adverse condi- 

 tions from the start. Then the follow- 

 ing winter weather is equally trying. 

 The prevailing weather is dry, with oc- 

 casional drying winds. The cold nights, 

 with a rise of temperature of 40 de- 

 grees or more the following noon, is 

 equally trying to newly planted trees. 



In the colder fruit section many trees 

 are killed by "freezing dry," as it is 

 termed. This occurs with established 

 trees when the ground freezes to such a 

 depth that root action is practically 

 stopped. Moisture is given off by the 

 tree tops during winter as well as in 

 summer, though not to such an extent. 

 When the ground is frozen, no water 

 can be taken in by roots and the tops 

 become so dry that many oi' the plant 

 cells are killed. Such trees may appear 

 all right in the spring and may bloom 

 and the leaves may grow to nearly 

 normal size. If the trees reach this 

 stage, they usually die suddenly, seem- 

 ingly in a day. 



Fall planted trees do not have the ad- 

 vantage of an established root system to 

 supply the moisture lost by evaporation, 

 consequently they are much more sus- 

 ceptible to injury during winter. It is 

 not necessary for the ground to become 

 frozen in order to bring about this con- 

 dition in fall set plants, so freezing dry 

 may occur in any locality. 



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I General Passenger Atfent 



DENVER, COLORADO 



Mother Grand y. Far-famed George- 

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