Table 3.

Post-harvest soil extractable Cu, Zn, and B in five contrasting soils used to grow wheat, pea, and canola, respectively.

Treatment	Soil type
	Whitewood	Echo	Whitefox	Sceptre	Ukalta
	mg Cu kg−1 soil
T1	0.86c	0.70b	1.31c	1.83c	0.38b
T2	3.07a	1.79a	4.56a	3.80a	1.77a
T3	1.98b	1.35a	2.34b	3.47ab	0.60ab
T4	1.10c	0.74b	1.45bc	1.95bc	0.30b
p-values	< 0.0001	0.0008	< 0.0001	0.009	0.013
SEM	0.206	0.124	0.188	0.316	0.275
	mg Zn kg−1 soil
T1	1.44c	1.18b	1.73c	0.79b	2.43b
T2	2.43a	1.89a	4.66a	2.03a	3.58a
T3	1.86b	1.54a	3.01b	1.20b	2.60b
T4	1.42c	1.15b	1.67c	0.92b	2.29b
p-values	< 0.0001	0.0002	< 0.0001	0.0005	0.0002
SEM	0.107	0.072	0.151	0.107	0.129
	mg B kg−1 soil
T1	1.09b	1.63b	0.51	1.22b	0.96b
T2	1.50a	2.48a	0.72	2.04a	1.92a
T3	0.85b	1.73b	0.56	1.27b	0.84b
T4	0.96b	1.83b	0.50	1.33b	0.95b
p-values	0.0003	0.006	NS	< 0.0001	< 0.0001
SEM	0.057	0.129	0.06	0.589	0.073

Treatment evaluation includes T₁: control; T₂: soil application (sulfate salt); T₃: soil application (chelated product) and T₄: foliar application (chelated product) of Cu and Zn for wheat and pea, respectively. For canola, the treatments of B are tested as- T₁: control; T₂: soil application; T₃: foliar application (one time) and T₄: foliar application (two times) using boric acid. Means in treatment column followed by the different letters are significantly different.

NS Not significant (p > 0.05), SEM Standard error of mean (n = 4).