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Table 2 Analysis of variance for labor energy (LE), fuel energy (FE), total machinery cost (TMC), total machinery energy (TME) models

From: Prediction of environmental indicators in land leveling using artificial intelligence techniques

Model Source Sum of squares df Mean square F value P value Prob > F
LE model Model 1.2411 3 4.1510 5523.914 < 0.0001
Slope 1.859 1 1.859 246.7733 < 0.0001
Cut-fill volume (V) 1.2111 1 1.2111 16,149.7 < 0.0001
Soil swelling index (SSI) 2.618 1 2.618 34.70285 < 0.0001
FE model Model 1.8413 3 6.1512 4632.446458 < 0.0001
Slope 3.4311 1 3.4311 258.640572 < 0.0001
V 1.7813 1 1.7813 13,457.37208 < 0.0001
% Sand 3.2810 1 3.2810 24.73922519 < 0.0001
TMC model Model 1.1619 3 3.8818 4751.319 < 0.0001
Slope 1.817 1 1.817 220.2573 < 0.0001
V 1.1319 1 1.1319 13,881.29 < 0.0001
SSI 2.2116 1 2.2116 27.00684 < 0.0001
TME model Model 6.6416 3 2.2116 5653.467 < 0.0001
Slope 9.614 1 9.614 245.4494 < 0.0001
V 6.4716 1 6.4716 16,537.35 < 0.0001
SSI 1.4414 1 1.4414 36.87527 < 0.0001