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. 1999 Jun 22;96(13):7598–7603. doi: 10.1073/pnas.96.13.7598

Table 2.

Soil means for nitrates and phosphorus (micrograms per milliliter), other elements (milliequivalents per milliliter), pH, and percent organic matter

Upper Milpa
Lower Milpa
Upper Guamil
Lower Guamil
Upper Reserve
Lower Reserve
Itzaj Ladino Q’eqchi’ Itzaj Ladino Q’eqchi’ Itzaj Ladino Q’eqchi’ Itzaj Ladino Q’eqchi’ Itzaj Ladino Q’eqchi’ Itzaj Ladino Q’eqchi’
Nitrates 78.3 37.8 33.6 64.9 39.1 20.4 56.4 18.4 13 31.8 13.5 12.4 27.9 39.6 27.37 23.3 30.3 27.97
P 19.1 17.2 7.3 8.14 11 4.44 7 3.27 6.18 1.91 2.37 2.17 1.95 5.99 2.87 1.79 2.92 2.03
K 0.46 0.29 0.47 0.23 0.21 0.29 0.25 0.22 0.37 0.12 0.17 0.28 0.19 0.22 0.24 0.08 0.12 0.19
Ca 34.9 38.8 38.3 44.5 46 56.1 39.4 40.1 42.5 48.7 53.5 52.8 39.2 32.4 46.86 55.6 44.1 59.42
Mg 2.66 2.36 2.24 3.72 2.2 1.7 2.24 2.03 2.41 1.7 1.85 2.03 2.18 3.35 1.73 2 3.21 2.17
pH 7.76 7.81 7.78 7.63 7.8 7.93 7.86 7.76 8.09 8.02 7.91 8.11 7.92 7.81 8 7.96 7.94 8.16
Percent organic matter 8.38 8.6 8.99 7.64 6.97 7.38 9.62 9 10.3 8.92 7.67 7.77 10.6 10.2 8.46 8.82 8.36 9.27