||Water Requirements of Sugarcane Under Irrigation in Lajas Valley, Puerto Rico.
Vazque, Roberto ;
||Puerto Rico Univ., Mayaguez. Agricultural Experiment Station.
||Bull-224; OWRR-A-005-PR; 05554,; FR-71-5
( Sugarcane ;
Water supply) ;
( Irrigation ;
Puerto Rico) ;
Soil water ;
Nitrogen inorganic compounds ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Field experiments were conducted in Puerto Rico at the Lajas Substation to determine optimum soil moisture conditions necessary to produce maximum sugarcane and sugar yields. Twenty irrigation regimes were tested. Some of the plots were irrigated frequently and others were irrigated less frequently in the active root zone throughout the growing period. Nitrogen fertilizer treatments were tested at the rate of 200 and 300 pounds per acre per crop. Data were taken for a 13-month plant cane and two 12-month ratoons of sugarcane. The plant cane used more water than the ratoon crop. The mean consumptive use per day was 0.160 inch for plant can and 0.154 inch for ratoon in the frequently irrigated plots throughout the growing period. The average of the combined yields of a plant cane and two ratoons were 73.67 tons of sugarcane and 7.80 tons of sugar per acre in the frequently irrigated plots and 59.37 tons of sugarcane and 6.40 tons of sugarcane per acre in the less frequently irrigated plots. (WRSIC abstract)