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Effects of Past Agricultural Practices on the Survival and Growth of Planted Trees¹

ABSTRACT

Four pine species (loblolly, shortleaf, red, and white) and three hardwood species (sycamore, green ash, and yellow-poplar) were planted on a recently abandoned agronomic experimental field in southern Illinois that had been used for 40 years to test crop rotations with various soil and fertilizer practices. After 7 growing seasons, pine survival and growth were poorest on the old limed plots (attributed to competition from weeds). After 6 growing seasons, hardwood survival and growth were best on the old limed plots. The effect of the tree species and the past fertilizer practices upon the chemical composition of the soil are given. Five years after plots were planted to pines, soil organic matter remained approximately the same on fertilized plots but nearly doubled on unfertilized plots.

¹ Contribution from the Department of Forestry and the Dixon Springs Exp. Sta., Illinois Agr. Exp. Sta., Urbana. Presented before Div. V-A, Soil Science Society of America, Nov. 30, 1961, at St. Louis, Mo.

² Assistant Professor and Professor.

Received for publication March 23, 1962. Accepted for publication July 5, 1962.