||Consumptive Use of Water by Sugarcane in Hawaii.
Eker, Paul C. ;
||Hawaii Univ., Honolulu. Water Resources Research Center.
||TR-37; DI-14-01-0001-1630; OWRR-A-014-HI; 01902,; A-014-HI(1)
( Water consumption ;
( Sugarcane ;
Sprinkler irregation ;
Soil water ;
Organic nitrates ;
Silicon dioxide ;
Meteorological data ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Water use by sprinkler irrigated sugarcane under flat-bed culture was measured in four 100 sq ft by 5 ft deep hydraulically weighed lysimeters at the Kunia substation of the Hawaiian Sugar Planters' Association. Nine-week-old one-eye cane transplants were set into a 5-foot grid in Molokai Low Humic Latosol on October 27, 1968. Water use approached a 1:1 ratio with a conventional class A pan by late March 1969 for a 3.5 leaf area index. Average values were 0.25 in/day for the midsummer months. The cane was ratooned on May 10, 1969 and water use was reduced to a 0.33 fraction of pan evaporation. The cane regrew rapidly and water use was again equivalent to pan evaporation by July 1969. Consumptive use by cane or pan often equalled or exceeded the net radiation, indicating strong positive advection of heat from the surroundings. During the early stages of cane growth, percolate from heavy winter rains contained as great as 225 ppm nitrate, but as the cane matured, the percolate had less than 1 ppm nitrate though the content of other solutes such as chloride, sulfate, and silica remained high. (WRSIC abstract)
|NTIS Title Notes
||Technical rept. Jul 67-Sep 69.
|PUB Date Free Form
||2C; 2D; 13B; 52C; 52E; 60I
||PC A06 MF A01