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Depth to Plow Pan as a Factor in Sugar Cane Production¹

ABSTRACT

Results from fertilizer studies in the sugar cane growing areas of Louisiana have shown no consistent relationship between native soil fertility as determined by soil tests and yields of sugar cane. In many cases there have been very low responses to the fertilizers. This investigation was made to determine what soil factors were related to yields. Measurements of depth to plow pan, aggregation, organic matter, soluble phosphorus, and exchangeable cations were made on check plots and plots receiving the highest rates of fertilizer.

Depth to plow pan was directly related to yield on unfertilized plots. There appeared to be a trend toward greater increases in yield due to added fertilizer as the depth to the plow pan decreased. Except in extreme cases other factors measured had less effect on yields.

¹ Contribution from the Department of Agronomy, Louisiana Agricultural Experiment Station, Louisiana State University, Baton Rouge, La. Presented before Section VI, Soil Science Society of America, State College, Pa., August 29, 1951.

² Associate Professor of Agronomy, Assistant Agronomist, and Head of the Agronomy Department, respectively.