Analysis of variance summary of the effects of tillage practice [i.e., conventional and no-tillage (n = 8)], pre-assigned urea fertilizer type [i.e., N-(n-butyl) thiosphosphoric triamide (NBPT)-coated and non-coated urea (n = 8)], and their interaction on soil physical [i.e., sand, silt, clay, and bulk density) and chemical properties [i.e., pH, electrical conductivity (EC), extractable soil P, K, Ca, Mg, Fe, Mn, Na, S, Cu, and Zn and total nitrogen (TN), total carbon (TC), and soil organic matter (SOM) contents] from 2017 at the Rice Research and Extension Center near Stuttgart, AR. Also reported are overall mean values (n = 16) for each soil property. Bolded values represent significant effects (P

Table 1: Analysis of variance summary of the effects of tillage practice [i.e., conventional and no-tillage (n = 8)], pre-assigned urea fertilizer type [i.e., N-(n-butyl) thiosphosphoric triamide (NBPT)-coated and non-coated urea (n = 8)], and their interaction on soil physical [i.e., sand, silt, clay, and bulk density) and chemical properties [i.e., pH, electrical conductivity (EC), extractable soil P, K, Ca, Mg, Fe, Mn, Na, S, Cu, and Zn and total nitrogen (TN), total carbon (TC), and soil organic matter (SOM) contents] from 2017 at the Rice Research and Extension Center near Stuttgart, AR. Also reported are overall mean values (n = 16) for each soil property. Bolded values represent significant effects (P < 0.05).

Soil property	Tillage	Fertilizer	Tillage × fertilizer	Overall mean (NT)	Overall mean (CT)
	P
Sand (g g^-1)	0.38	0.24	0.24	0.15a^†	0.13a^†
Silt (g g^-1)	0.76	0.18	0.30	0.71a	0.71a
Clay (g g^-1)	0.24	0.99	0.45	0.14a	0.16a
Bulk density (g cm^-3)	< 0.01	0.02	0.04	1.19	1.38
pH	0.03	0.08	0.38	5.43b	6.09a
EC (dS m^-1)	0.38	0.93	0.25	0.19a	0.21a
P (kg ha^-1)	0.04	0.48	0.70	15.9b	18a
K (kg ha^-1)	0.80	0.02	0.03	146	143
Ca (Mg ha^-1)	0.10	0.38	0.22	1.16a	1.49a
Mg (kg ha^-1)	0.04	0.91	0.30	162	260a
S (kg ha^-1)	0.69	0.76	0.78	15.1a	14.6a
Na (kg ha^-1)	< 0.01	0.40	0.28	52b	97.4a
Fe (kg ha^-1)	0.02	0.54	0.66	507a	424b
Mn (kg ha^-1)	< 0.01	0.67	0.33	219b	289a
Zn (kg ha^-1)	< 0.01	0.79	0.64	6.09a	2.91b
Cu (kg ha^-1)	0.16	0.91	0.98	1.41a	1.62a
TN (kg ha^-1)	0.66	0.22	0.35	903a	853a
TC (Mg ha^-1)	0.53	0.20	0.21	9.23a	8.49a
SOM (Mg ha^-1)	0.70	0.27	0.17	23.1a	23.6a
C:N ratio	0.23	0.68	0.34	10.20a	9.97a

^†Means in a row with different letters are different at the P < 0.05 level; the a and b notations show the results of statistical analyses.