PCM'IOLOGICAL PARAGRAPHS 



Strawberry Production 



The ten major strawberry producing states In 1960 and the portion of total 

 United States crop were: California (337.), Ore;5on (16%), Washington (9%), 

 Michigan (97.), Tennessee (57.), Arkansas (47.), Louisiana (37.), New York (37.), New 

 Jersey (37.), Virginia (27.). 



The principal strawberry varieties of the United States based on percentage 

 of commercial acreage in 1960 are shown in the following table taken from an 

 article of D. H. Scott, USDA, titled "New Varieties and the Variety Picture in 

 Relation to Strawberry Production" published in the 1960 Transactions of the 

 Peninsula Horticultural Society . 



Variety % Variety TL 



Blakemore 18 Jerseybelle 2 



Northwest 17 Pocahontas 2 



Robinson 



Lassen 



Headliner 



Tennessee Beauty 



Catskill 



Sparkle 



Howard 17 



Shasta 



Marshall 



^These include Earlldawn, Empire, Fairfax, Klondike, Midland, Missionary, Redstar, 

 Surecrop, and Vermilion. 



— -William J. Lord 



Apple Tree Roots 



The growth habit of the above-ground portion of apple trees is apparent to 

 growers. However, this is not the situation with the roots and the results of 

 some studies on this part of the tree may be of Interest. 



The young growing apple root is white and succulent with very short root 

 hairs. Apparently, these root hairs are short lived and are able to absorb water 

 and other materials for only one to four weeks. New root hairs are continually 

 formed in back of the growing tip. 



The majority of the growing roots do not persist. However, some remain to 

 form the framework for the new root system. 



Root growth of apple trees is correlated with soil temperature. Some growth 

 occurs during the winter months when soil temperature is from 35 to 45°F. Active 

 root growth commences at temperatures from about 45°F upward and Increases with 

 rising temperature. The studies by Rogers in England indicate that active root 

 growth begins a month or two before shoot growth and continues after shoot growth 



