Cadmium and Zinc Concentration in Grain of Durum Wheat in Relation to Phosphorus Fertilization, Crop Sequence and Tillage Management

Table 3

Grain yield (kg ha⁻¹) of durum wheat as affected by tillage system, crop rotation, and P fertilization on at two sites over 3 years.

		BRC North			MZTRF
		2001	2002	2003	2001	2002	2003
Tillage
Conventional		1790	3086	2696	3282	3221	2912
Reduced		1888	2835	3042	3235	3566	2870
LSD		71	137	269	79	139	101
Crop rotation
wheat-flax-durum		1823	2851	2888	3234	3393	2933
Canola-flax-durum		1854	3070	2851	3283	3394	2849
LSD		70	137	269	79	139	101
P fertilization
0-0-25		1894	2993	2927	3291	3300	2900
0-25-0		1733	2801	2677	3294	3131	2895
25-0-25		1839	2919	2860	3217	3552	2869
25-25-0		1832	3043	2900	3142	3284	2837
50-0-25		1871	2931	2939	3265	3546	2945
50-25-0		1865	3077	2911	3343	3546	2901
LSD		123	237	466	137	241	174
Analysis of variance
Source	DF	Pr ≥ F
Tillage	1	0.0079	0.0005	0.0127	n.s.	<0.0001	n.s.
Crop rotation	1	n.s.	0.0022	n.s.	n.s.	n.s.	n.s.
P fertilization	5	n.s.	n.s.	n.s.	n.s.	0.0015	n.s.