Table 3 Correlation and significance results (P-Value) between independent and dependent variables.

From: A novel early stage drip irrigation system cost estimation model based on management and environmental variables

Parameter	TC_P		TC_F		TC_I		TC_T
Parameter	R	P-Value	R	P-Value	R	P-Value	R	P-Value
A (ha)	0.301	0.002 **	0.550	** 0.000	0.142	^ns 0.158	0.400	** 0.000
P/A (1/m)	−0.304	0.002 **	−0.193	^ns 0.054	−0.027	^ns 0.790	−0.211	* 0.035
N_PL	−0.033	^ns 0.743	0.330	** 0.001	0.038	^ns 0.706	0.113	^ns 0.262
D_SF (m)	−0.124	^ns 0.220	0.452	** 0.000	0.118	^ns 0.243	0.167	^ns 0.097
∆H_SF (m)	0.257	*0.010	0.055	^ns 0.586	0.294	** 0.003	0.336	** 0.001
Q_T (l/s)	−0.134	^ns 0.184	−0.042	^ns 0.679	0.059	^ns 0.563	−0.030	^ns 0.766
N_HO	0.261	**0.009	−0.102	^ns 0.312	0.014	^ns 0.887	0.093	^ns 0.356
S_R (m)	0.207	* 0.039	−0.062	^ns 0.543	0.355	** 0.000	0.322	** 0.001
S_P (m)	0.240	* 0.016	−0.099	^ns 0.328	0.251	* 0.012	0.252	* 0.011
ET_P (mm/day)	−0.409	** 0.000	0.032	^ns 0.753	−0.282	** 0.005	0.368	** 0.000
F_SP (mm/hr)	−0.065	^ns 0.519	0.015	^ns 0.885	−0.005	^ns 0.957	−0.028	^ns 0.783
AW (mm/m)	0.003	^ns 0.976	−0.046	^ns 0.649	0.011	^ns 0.912	−0.005	^ns 0.962
W_A (%)	−0.350	** 0.000	0.118	^ns 0.244	−0.478	** 0.000	−0.454	** 0.000
Q_E (l/s)	−0.028	^ns 0.786	0.122	^ns 0.227	0.011	^ns 0.913	0.033	^ns 0.744
N_E	−0.049	^ns 0.626	0.631	** 0.000	−0.148	^ns 0.141	0.067	^ns 0.510
T (h)	0.179	^ns 0.075	−0.011	^ns 0.914	−0.075	^ns 0.458	0.022	^ns 0.828
N_IT	0.008	^ns 0.937	0.358	** 0.000	0.035	^ns 0.732	0.137	^ns 0.173
A_IT (ha)	0.269	** 0.007	0.172	^ns 0.088	0.087	^ns 0.388	0.232	* 0.020
N_IU	−0.134	^ns 0.183	0.520	** 0.000	0.045	^ns 0.657	0.132	^ns 0.191
A_IU (ha)	0.304	** 0.002	−0.028	^ns 0.783	−0.012	^ns 0.905	0.116	^ns 0.250
F (day)	−0.031	^ns 0.756	−0.015	^ns 0.884	0.202	* 0.043	0.124	^ns 0.217
N_IUS	−0.106	^ns 0.296	0.259	** 0.009	0.062	^ns 0.542	0.076	^ns 0.450
L_16mm (m)	−0.015	^ns 0.881	0.638	** 0.000	−0.149	^ns 0.139	0.083	^ns 0.409
L_32mm (m)	0.075	^ns 0.457	−0.086	^ns 0.392	0.122	^ns 0.228	0.092	^ns 0.362
L_40mm (m)	0.143	^ns 0.156	−0.106	^ns 0.293	0.335	** 0.001	0.266	** 0.007
L_50mm (m)	−0.022	^ns 0.831	0.075	^ns 0.458	0.130	^ns 0.198	0.105	^ns 0.299
L_63mm (m)	0.058	^ns 0.564	0.362	** 0.000	−0.038	^ns 0.706	0.109	^ns 0.279
L_75mm (m)	−0.065	^ns 0.521	0.328	** 0.001	−0.205	* 0.040	−0.073	^ns 0.471
L_90mm (m)	−0.047	^ns 0.643	0.464	** 0.000	0.137	^ns 0.173	0.218	* 0.029
L_110mm (m)	−0.226	* 0.024	0.191	^ns 0.057	−0.077	^ns 0.448	−0.095	^ns 0.349
L_125mm (m)	−0.271	** 0.006	0.174	^ns 0.083	−0.042	^ns 0.678	−0.095	^ns 0.347
L_160mm (m)	−0.192	^ns 0.055	0.091	^ns 0.368	−0.058	^ns 564/0	−0.097	^ns 0.335
L_200mm (m)	0.129	^ns 0.202	0.052	^ns 0.607	−0.247	* 0.013	0.247	^ns 0.313
W_Q	−0.066	^ns 0.516	−0.087	^ns 0.388	−0.169	^ns 0.093	−0.174	^ns 0.083
Q_S (l/s)	0.618	** 0.000	0.006	^ns 0.950	0.021	^ns 0.834	0.287	** 0.004
P_P (kw)	0.766	** 0.000	−0.054	^ns 0.597	0.154	^ns 0.125	0.428	** 0.000
H_P (m)	0.666	** 0.000	−0.171	^ns 0.090	0.269	** 0.007	0.429	** 0.000
D_FE (m)	0.287	** 0.004	0.171	^ns 0.088	0.057	^ns 0.573	0.218	* 0.029
S (%)	0.085	^ns 0.402	−0.005	^ns 0.961	0.264	** 0.008	0.222	* 0.027

* and ** indicate significance at 5 and 1% probability levels, respectively, and ^ns indicates no significant difference. Also, the highlighted cells in this table and other tables represent the most important results or the best outputs.

Back to article page

Table 3 Correlation and significance results (P-Value) between independent and dependent variables.

Search

Quick links