The Scientific World Journal / 2014 / Article / Tab 3 / Research Article
Spatial Distribution and Temporal Variability of Ammonium-Nitrogen, Phosphorus, and Potassium in a Rice Field in Corrientes, Argentina Table 3 Semivariogram model type, parameters for best fitted model (
: nugget;
: structural variance;
: range), and cross-validation indicators (
: determination coefficient; ME: mean error, NMSE: no dimensional mean square error) of the studied NH
4 -N, P, and K data sets.
Lime Code Model ME NMSE Ammonium nitrogen, First sampling 0 NH4 -10 Spherical 1.09 14.20 7.1 47.0 0.923 0.003 1.004 625 NH4 -11 Spherical 6.37 10.41 38.0 45.1 0.663 −0.011 0.994 1250 NH4 -12 Spherical 13.58 19.05 41.6 68.9 0.932 −0.016 0.926 Second sampling 0 NH4 -20 Spherical 0.00 15.57 0.0 40.9 0.876 −0.003 1.147 625 NH4 -21 Exponential 0.00 12.25 0.0 59.5 0.912 −0.005 0.992 1250 NH4 -22 Exponential 0.00 13.08 0.0 49.8 0.869 −0.019 1.000 Third sampling 0 NH4 -30 Spherical 1.95 24.15 7.5 53.2 0.639 −0.001 0.813 625 NH4 -31 Spherical 0.00 33.96 0.0 71.9 0.907 0.002 0.922 1250 NH4 -32 Spherical 2.60 13.92 15.7 84.6 0.972 −0.008 0.937 Phosphorus, P First sampling 0 P-10 Spherical 0.23 1.59 12.6 51.7 0.835 −0.052 1.060 625 P-11 Spherical 0.61 1.54 28.4 64.0 0.836 −0.003 1.020 1250 P-12 Spherical 0.44 2.29 16.1 53.0 0.850 0.002 0.903 Second sampling 0 P-20 Spherical 0.42 4.86 8.0 65.2 0.951 −0.000 1.097 625 P-21 Spherical 0.43 6.24 6.4 47.7 0.944 −0.019 0.996 1250 P-22 Spherical 1.53 1.97 43.7 76.3 0.908 −0.014 1.029 Third sampling 0 P-30 Spherical 1.41 2.30 38.0 73.9 0.976 0.002 0.848 625 P-31 Spherical 0.74 2.11 26.0 57.7 0.843 0.027 0.855 1250 P-32 Spherical 0.89 2.25 28.3 60.0 0.912 0.001 0.941 Potassium, K First sampling 0 K-10 Spherical 4.97 46.74 9.6 59.7 0.861 0.011 1.184 625 K-11 Spherical 6.55 33.12 16.5 54.2 0.903 −0.005 0.948 1250 K-12 Spherical 15.96 21.35 42.8 51.4 0.925 0.013 0.901 Second sampling 0 K-20 Spherical 6.73 18.65 26.5 65.5 0.891 0.006 0.954 625 K-21 Spherical 14.61 75.20 16.3 52.3 0.887 0.049 0.863 1250 K-22 Spherical 16.56 43.79 27.4 58.9 0.783 0.004 0.782 Third sampling 0 K-30 Spherical 1.46 6.66 18.0 63.1 0.899 −0.024 0.882 625 K-31 Spherical 2.46 3.71 39.9 68.2 0.921 0.003 1.075 1250 K-32 Spherical 3.52 6.84 34.0 76.8 0.960 −0.008 0.690
