Table 5 Effect of different sources and method of Zn fertilization on protein content and oil content of soybean during the experimentation. Means followed by a similar uppercase letter within a column are not significantly different at p < 0.05 using tukey’s HSD test.

From: Zinc-based agronomic bio-fortification strategies for soybean in the North Eastern Himalayas of India

Treatments

Protein content (%)

Protein yield (kg ha−1)

Oil content (%)

Oil yield (kg ha−1)

 

2018

2019

2018

2019

2018

2019

2018

2019

Varieties

        

JS-335

38.6a

38.4a

577.1b

583.6b

16.9b

17.4b

252.1b

265.2b

JS-97-52

38.0a

38.1a

713.6a

646.7a

17.9a

17.9a

337.7a

304.5a

Local

37.1a

37.4a

483.8c

466.1c

16.5b

17.0c

213.1c

211.2c

Zn fertilization strategies

        

Control

35.8c

35.7c

496.7e

470.5d

16.4c

16.74c

227.3d

220.4d

SA-ZS

38.2b

38.3b

586.4cd

562.4c

16.9bc

16.9bc

261.4bc

248.3c

SA-ZO

37.7bc

37.9bc

565.4d

553.3c

17.0bc

17.4b

257.0c

255.7bc

SA + FA-ZS

39.2a

39.2ab

648.2a

623.7a

17.5ab

18.0a

292.2a

287.8a

SA + FA-ZO

38.1abc

38.4ab

613.6bc

580.9bc

17.1abc

17.3ba

276.1b

261.7bc

FA-ZS

39.7a

39.3a

644.7ab

608.1ab

17.9a

18.1a

293.4a

283.1a

FA-ZO

36.7bc

36.9bc

585.5cd

559.4c

17.8bc

17.4b

265.9bc

265.0b

Int. (LSD p = 0.05)

NS

NS

NS

NS

*

*

NS

NS

  1. Where, the SA-ZS and SA-ZO denotes soil application of Zn @ 5 kg ha−1 through ZnSO4.7H2O and ZnO, respectively; SA + FA-ZS, soil application of Zn at 5 kg ha−1 through ZnSO4.7H2O + foliar spray of ZnSO4.7H2O at 0.25% at pre-flowering and pod formation stages; SA + FA-ZO, soil application of Zn at 5 kg ha−1 through ZnO + foliar spray of ZnO at 0.25% at pre-flowering and pod formation stages; FA-ZS and FA-ZO, foliar spray of ZnSO4.7H2O and ZnO, respectively, at 0.5% at maximum vegetative stage, pre-flowering and pod formation stage.