The cherry is rapidly becoming Utah's most important fruit crop. According to the 1930 census, there were 110,050 bearing and 114,230 non-bearing cherry trees in Utah orchards. Most of these trees are sweet cherries, the newer plantings consisting mainly of Bing and Lambert trees, although Napoleon predominated in the older plantings.
The problem of pollination is of more importance with the cherry than with other- fruits, because of the large number of individual fruits required to make a crop and because of the self-sterility and intersterility shown by the major commercial sweet varieties.
As has been shown by the investigations of Gardner (1913), Tufts (1916), Sutton (1918), and later workers, all sweet cherries are practically selfsterile, and the three major varieties, Bing, Lambert, and Napoleon, are intersterile, i.e., they will not set crops with each other's pollen. A fourth variety must be interplanted with these three varieties to secure satisfactory yields of fruit. Black Tartarian and Black Republican were particularly recommended as pollinizers by Gardner (1913) and by Tufts and Philp (1925), although most of the other varieties were shown to have pollinizing value.
Coe, Francis M., "Bulletin No. 245 - Cherry Pollination Studies in Utah" (1934). UAES Bulletins. Paper 207.