By the 1950s pecans were being divided into two general kinds, natives and improved varieties. Most Texas-grown pecans were native and were often shelled commercially before marketing, while the improved varieties were more often sold in the shell. In the 1950s Texas led the nation in total number of pecan trees and was usually first in annual production. The 1954 crop totaled 22 million pounds and was valued at $5,886,000. The 1960 crop comprised more than 21 percent of the nation's total crop. That year 2,000,000 trees on nearly 16,000 farms produced over 8½ million pounds of pecans valued at $8,600,000.