THE RELATIONSHIP OF ANTS AND OTHER ORGANISMS TO CERTAIN SCALE INSECTS ON COFFEE IN PUERTO RICO
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How to Cite

Smith, M. R. (1942). THE RELATIONSHIP OF ANTS AND OTHER ORGANISMS TO CERTAIN SCALE INSECTS ON COFFEE IN PUERTO RICO. The Journal of Agriculture of the University of Puerto Rico, 26(2), 21–39. https://doi.org/10.46429/jaupr.v26i2.13583

Abstract

1. Ninety-four percent of the roots of 21-year-old coffee trees growing in Catalina soil are found in the uppermost 12 inches of soil. 2. A well developed and heavy tree top was found to be correlated with a heavy and extensive root system, 3. The top to root ratio was 4 to 1. 4. Primary roots comprised 57.22 percent of the whole root system; secondary 25.72 percent and tertiary, 17.06 percent. 5. Primary roots were confined to the first 24 inches, secondaries to the 0-72 inch levels, while tertiary roots were found distributed throughout the 0-96 inch levels. 6. While the lateral spread of roots was over 8 feet, the penetration was slightly over 3 feet.
https://doi.org/10.46429/jaupr.v26i2.13583
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