Shale Area

Cassava Leaf

(Zn)p = 215.834 − 0.186 (Zn)s − 8.746 pH + 1.124 OM

R² = 0.688

(Ca)p = −0.125 − 0.034 (Ca)s + 0.052 pH − 0.005 OM

R² = 0.709

(Co)p = 3.474 + 0.000 (Mo)s − 0.249 pH − 0.159 OM

R² = 0.986

Stem

(Ca)p = 2.348 − 1.65 pH − 143 OM − 252 Ca(s)

R² = 0.520

(K)p = −3.259 + 0.37 pH + 0.244 OM − 0.038 K(s)

R² = 1.000

(Al)p = −0.178 + 0.012 pH + 0.020 OM + 0.018 Al(s)

R² = 0.878

(Na)p = −0.096 + 0.028 pH − 0.012 OM + 0.027 Na(s)

R² = 0.878

Limestone Area

Cassava Leaf

(Ca)p = 0.849 − 0.26 pH − 0.34 OM − 0.318 Ca(s)

R² = 0.900

(Fe)p = 0.038 − 0.002 pH − 0.00 OM − 0.003 Fe(s)

R² = 0.835

(Cu)p = 14.535 − 1.958 pH − 0.788 OM − 0.101 Cu(s)

R² = 1.000

(Pb)p = 0.441 + 0.186 pH − 0.112 OM − 0.001 Pb(s)

R² = 0.950