000			016290000a22003130004500
901			_aP10
904			_aBCO
905			_aC
909			_aAS
914			_aCUENCAS
090			_aC _b26283
100	1		_956160 _aCHACON S., J.
260			_c1981
041	0		_aEn
500			_aIlus. Dat.num. 14ref. Sum.(En)
520			_aStudy of the chemical properties of the ground water from the upper shed of the Cañas river, Guanacaste. Based on the boron content, the Wilcox classification and the US Salinity Laboratory norms, the underground water from the Cañas river upper shed are good irrigation waters. The water table movement profile is deduced from the isoboron curves, which show a steady increment in the boron concentration from the periphery to the geographical center of the shed. The average shape of the Stiff diagrams are characteristic for the Wilcox classes 1 and 2 encountered for the area, and their ratios are 2:1. All the patterns of behavior described for the aquifer are good basis for future comparative studies in Guanacaste and determine, as well, a much simpler sampling and monitoring operation
650	1	4	_9135052 _aAGUA DEL SUELO
650	1	4	_9142951 _aCUENCA RIO CAÑAS
650	1	4	_92064 _aCOSTA RICA
691			_9338973 _aSOIL WATER
691			_aCOSTA RICA _92064
692			_aEAU DU SOL
692			_aCOSTA RICA
773	0		_tAgronomía Costarricense _d1981 _gv.5(1/2) p.135-139
040			_aCR-TuBCO _cCR-TuBCO _bEs
245	1	0	_aEstudio de las condiciones químicas del agua subterránea de la cuenca superior del río Cañas, Guanacaste
942			_cANA
003			CR-TuBCO
999			_c59793 _d59793