exch


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Related to exch: foreign exchange, exchanges

exch.

1. exchange.
2. exchequer.
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Soil evaluation factor = [Exch K (c eq/kg dry soil) + exch Ca (c eq/kg dry soil) + exch Mg (c eq/kg dry soil)--log(1 + exch Al(c eq/kg dry soil))] x organic matter (%, dry soil) + 5 [2]
Column (1) shows the estimate of equation (10), in which the variable exch is significant with expected signs.
(4) FORDEBT = [FORDEBT(-1)/(Y/Y(-1)] + (1 - FIN) * DEF+ [d(EXCH)/100] * [FORDEBT(-1)/(Y/Y(-1)]
For the initial samples, exch. K and the other exchangeable bases (Ca, Al, Na, Mn, and Mg) were measured on the supernatant, whereas only exch.
Table 1: Descriptive Statistics of topsoil proper (0-15cm) in the study area Soil Properties Mean Standard Coefficient Deviation of ([+ or -]) Variation (%) Sand (%) 89.3 10.82 12.1 Silt (%) 6.10 0.82 13.2 Clay (%) 4.90 0.59 12.0 Electrical Conductivity 90.1 17.29 19.1 l2 PH ([Cac.sub.12]) 5.83 1.44 24.7 Organic Matter (% ) 3.74 0.55 14.7 Exch. [Na.sup.+] (mmol 0.15 0.04 26.7 [Kg.sup.-1]) Exch.
Sequential fractionation procedure for soil cobalt and manganese Step Nominal Extractant Soil Solution fraction (g) (mL) 1 Exchangeable 0.01 M calcium 5 30 EXCH nitrate 2 Organic-bound 3% sodium 10(A) 20 ORG hypochlorite (pH 8.5) 3 Free Mn oxides 0.1 M hydroxylamine 2(B) 20 MnOX 4 Amorphous 0.2 M ammonium 2 25 iron oxides oxalate + 0.2 M FeAM oxalic acid (pH 3) 5 Crystalline Extractants as for 2 25 iron oxides step 4 plus 0.1 M FeCR ascorbic acid 6 Residual Concentrated nitric 0.5(C) 10 RES acid Step Conditions 1 Shaken 24 h 2 Boiling water bath 30 min (repeat) 3 Shaken 30 min 4 Shaken 4 h in the dark 5 Boiling water bath 30 min.
Dimensions Heat Exch. 19 X 11 X 22 22 X 11 X 19 29 X 22 X 19
Significance of main effects of altitude, aspect, and position for selected soil attributes Slope Attribute Altitude Aspect position 0-7.5 cm soils pH([H.sub.2]O) <0.001 <0.001 >0.05 pH(Ca[C1.sub.2]) <0.001 <0.001 >0.05 C (%) <0.001 <0.001 >0.05 N (%) 0.011 <0.001 >0.05 P retention (%) >0.05 <0.001 >0.05 Exch. Ca (cmol(+)/kg) <0.001 0.01 >0.05 Exch.