Kriging Approach for Estimating Deficient Micronutrients in the Soil: A Case Study

Fe: Isotropic Variogram

2803149.

x x

0.297

Fe

x

x x x

x

x

x

10.6

0.223

10.2

2798976.

9.9

0.148

x

9.5

9.2

0.074

8.8

8.5

8.2

0.000

7.8

0.00

2123.28

4246.56

6369.84

2794803.

7.5

7.1

Separation Distance (h)

6.8

6.4

x

6.1

Gaussian model (Co = 0.1423; Co + C = 0.2856; Ao = 6100.00; r2 = 0.081;

5.7

x

5.4

RSS = 0.101)

Figure 4. Variogram Model (Fe)

2790630.

x x

x

688158. 690911. 693664. 696417.

Onȱtheȱbasisȱofȱtheseȱvariogramsȱpredictionȱweightsȱ

X

wereȱ takenȱ forȱ Krigingȱ interpolationȱ methodȱ andȱ

spatialȱ mapsȱ wereȱ generated.ȱ Spatialȱ distributionȱ

Figure 7. Spatial Distribution Map for Fe

mapsȱofȱavailableȱmicronutrientsȱwereȱdevelopedȱbyȱ

usingȱtheseȱvariogramȱmodelsȱshownȱinȱFigureȱ5ȱforȱ

Conclusion

Zn,ȱFigureȱ6ȱforȱBȱandȱFigureȱ7ȱforȱFe.

Theȱ presentȱ paperȱ aimedȱ toȱ estimateȱ theȱ amountȱ

2803149

x x

ofȱ deficientȱ micronutrientsȱ namelyȱ Zn,ȱ Bȱ andȱ Feȱ

x

x x x

x

xx

atȱ differentȱ locationsȱ ofȱ Kashiȱ Vidyapeethȱ blockȱ

ofȱ Varanasiȱ district,ȱ Uttarȱ Pradeshȱ (India).ȱ Theȱ

Zn

2798976

x

1.56

1.47

amountȱofȱtheseȱmicronutrientsȱavailableȱatȱsampledȱ

1.38

1.29

1.20

locationsȱwasȱusedȱtoȱdevelopȱtheȱvariogramȱmodelsȱ

1.11

1.02

0.93

0.85

toȱdescribeȱspatialȱvariability.ȱSphericalȱandȱGaussianȱ

0.76

0.67

2794803

0.58

variogramȱmodelsȱwereȱfoundȱtoȱbeȱtheȱbestȱfitȱonȱ

0.49

0.40

0.31

0.22

theȱbasisȱofȱhigherȱvaluesȱofȱR 2 ȱandȱlowerȱvaluesȱofȱ

x

RSS.ȱ Spatialȱ distributionȱ mapsȱ wereȱ generatedȱ byȱ

x x x

2790630

usingȱKrigingȱinterpolationȱmethodȱwhichȱwouldȱbeȱ

x

688158

690911

693664

696417

usefulȱforȱenablingȱtheȱfarmersȱtoȱdecideȱtheȱamountȱ

X

ofȱ deficientȱ micronutrientsȱ nutrientsȱ toȱ beȱ appliedȱ

Figure 5. Spatial Distribution Map for Zn

forȱ economicȱ returnsȱ basedȱ onȱ theȱ siteȱ specificȱ

micronutrientsȱmanagement.

Acknowledgement

TheȱauthorsȱareȱthankfulȱtoȱtheȱIndianȱInstituteȱSoilȱ

Scienceȱ(IISS),ȱBhopalȱandȱMinistryȱofȱAgriculture,ȱ

NewȱDelhiȱforȱprovidingȱdataȱtoȱcarryȱoutȱtheȱpresentȱ

study.ȱTheȱfirstȱauthorȱisȱgratefulȱtoȱDST,ȱNewȱDelhiȱ

forȱ awardingȱ INSPIREȱ Fellowshipȱ toȱ conductȱ theȱ

researchȱwork.

References

Bellȱ Rȱ andȱ Dellȱ Bȱ 2006.ȱ Importanceȱ ofȱ micronutrientsȱ inȱ

cropȱ production:ȱ aȱ reviewȱ ofȱ theȱ changingȱ scene. 18th

Figure 6. Spatial Distribution Map for B

World Congress of Soil Science July 9-15, 2006 - Philadelphia,

Pennsylvania, USA .

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