International Journal of Agronomy

Research Article

Zinc Sulphate and Boron-Based Foliar Fertilizer Effect on Growth, Yield, Minerals, and Heavy Metal Composition of Groundnut (Arachis hypogaea L) Grown on an Alfisol

Table 6

Effect of zinc and boron fertilizers on some heavy metal concentrations (mg·kg⁻¹) in groundnut seeds (Pooled data of 2016 and 2017 cropping seasons).


Treatment	Zinc	Copper	Cadmium	Iron	Chromium	Manganese

ZnSO₄ kg·ha⁻¹
0	0.0227c	0.0355c	0.1763a	0.2340a	0.0225a	0.1110c
4	0.0440b	0.0370b	0.1755b	0.2330b	0.0210b	0.1120b
8	0.0450a	0.0385a	0.1750b	0.2325b	0.0205b	0.1128a

Boron (ml·ha⁻¹)
0	0.0430c	0.0307c	0.1637c	0.2283b	0.0210b	0.0927c
300	0.0480b	0.0307c	0.1827b	0.2493b	0.0223b	0.1177b
600	0.0485b	0.0470b	0.2000a	0.2983a	0.0347a	0.1340a
900	0.0572a	0.0563a	0.2012a	0.2997a	0.0350a	0.1415a

Interaction
Zn
B
ZnB
FAO/WHO	99.4	10	0.2	0.3	1.30	0.5

Means in a column under any given treatment followed by the same letters do not differ significantly at 0.05 level of probability using the Duncan multiple range test (DMRT). Significant at 0.05 level of probability. FAO/WHO (2010) recommended limit.