International Journal of Plant & Soil Science

A field experiment was conducted during rabi 2022-23 at Agronomy Instructional Farm, Chimanbhai Patel College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar. The soil of the experimental field was loamy sand in texture, neutral to alkaline in reaction, normal with respect to salt content, low in available nitrogen and sulphur, medium in available phosphorus, potash, zinc and iron and high in manganese and copper. Nine treatment combinations comprising three levels of iron 0.0 kg Fe ha^-1 (Fe₀), Soil application of 20.0 kg FeSO₄. 7H₂O ha^-1 (Fe₁) and 0.5 % FeSO₄. 7H₂O foliar spray at 30 and 45 DAS (Days after sowing) (Fe₂) and three levels of zinc 0.0 kg Zn ha^-1 (Zn₀), Soil application of 10.0 kg ZnSO₄. 7H₂O ha^-1 (Zn₁) and          0.5 % ZnSO₄. 7H₂O foliar spray at 30 and 45 DAS (Zn₂) were evaluated in randomized block design with factorial concept with four replication. Mustard variety GDM 4 was used as a test crop.

Significantly higher number of secondary branches plant^-1 (16.59), number of siliquae plant^-1 (341.4), test weight (5.18 g), seed yield (2061 kg ha^-1) and stover yield (4976 kg ha^-1) were recorded with soil application of 20.0 kg FeSO₄. 7H₂O ha^-1 (Fe₁) but it was at par with 0.5 % FeSO₄. 7H₂O foliar spray at 30 and 45 DAS. Stover yield of mustard remained at par with 0.5 % FeSO₄. 7H₂O foliar spray at 30 and 45 DAS.

Significantly higher number of secondary branches plant^-1 (16.37), number of siliquae plant^-1 (340.1), seed (2001 kg ha^-1) and stover yield (4961 kg ha^-1) were recorded with soil application of 10.0 kg ZnSO₄. 7H₂O ha^-1 (Zn₁) but it was at par with foliar spray of 0.5 % ZnSO₄. 7H₂O at 30 and 45 DAS except seed yield of mustard.