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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39
For more details click here

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Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(11): 310-324
DOI: https://doi.org/10.20546/ijcmas.2017.611.035


Phosphorus Status in Soils of Eastern Dry Zone, Karnataka
M. Chandrakala1*, C.A. Srinivasamurthy2, Sanjeev Kumar3, S. Bhaskar4, V.R.R. Parama5 and D.V. Naveen6
1National Bureau of Soil Survey and Land Use Planning, Regional Centre, Hebbal,Bangalore-560 024, Karnataka, India
2Director of Research, Central Agricultural University, Imphal, Manipur, India
3National Dairy Research Institute, Karnal Haryana 132001
4Department of Agronomy, UAS, Bangalore-560 065, Karnataka, India
5Department Soil Science and Agricultural Chemistry, UAS, Bangalore, Karnataka, India
6Deptartment of Soil Science and Agricultural Chemistry, Sericulture College,Chintamani, Karnataka, India
*Corresponding author
Abstract:

Phosphorus (P) deficiency is second to nitrogen (N) and its deficiency is widespread. Soil based site specific P recommendation for sustainable crop productivity mainly relies on status, and availability of phosphorus. Representative soil samples (250) from different agro-ecological regions of Eastern Dry Zone (EDZ) of Karnataka were analysed for P status and randomly collected samples were analysed for P fractions. Results revealed that, AvP (Available phosphorus) ranged 12.74 to 94.70; 11.21 to 49.55; 10.70 to 98.32 and 10.22 to 64.05 kg ha-1 in Bangalore Rural, Tumkur, Kolar and Chikkaballapura districts, respectively. Among P fractions, total-P (range: 1218.90-3383.08 mg kg-1), organic-P (range: 624.95-3461.85 mg kg-1), reductant soluble-P (range: 132.56-364.55 mg kg-1), occluded-P (range: 7.38-49.69 mg kg-1) and Ca-P (range: 6.21-38.76 mg kg-1) content increased as the P fertility of soil increased and decreasing trend was recorded for Saloid-P (range: 38.31-63.23 mg kg-1), Al-P (range: 61.49-164.31 mg kg-1) and Fe-P (range: 35.23-109.87 mg kg-1) fractions. Total account of phosphorus is necessary tool for soil based P recommendation under both irrigated and rainfed agriculture.


Keywords: Available soil phosphorus, Eastern Dry zone Karnataka, P Fractions.
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How to cite this article:

Chandrakala, M., C.A. Srinivasamurthy, Sanjeev Kumar, S. Bhaskar, V.R.R. Parama and Naveen, D.V. 2017. Phosphorus Status in Soils of Eastern Dry Zone, Karnataka.Int.J.Curr.Microbiol.App.Sci. 6(11): 310-324. doi: https://doi.org/10.20546/ijcmas.2017.611.035