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Phosphorus Status in Soils of Eastern Dry Zone, Karnataka, India

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Title Phosphorus Status in Soils of Eastern Dry Zone, Karnataka, India
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Creator M. Chandrakala, C.A. Srinivasamurthy, Sanjeev Kumar, S. Bhaskar, V.R.R. Parama and D.V. Naveen
 
Subject Phosphorus, status, Eastern Dry Zone, Karnataka
 
Description RKVY funded by State govt. of Karnataka
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.
 
Date 2020-06-30T08:02:32Z
2020-06-30T08:02:32Z
2017-12-01
 
Type Research Paper
 
Identifier https://doi.org/10.20546/ijcmas.2017.611.035
2319-7706
http://krishi.icar.gov.in/jspui/handle/123456789/37607
 
Language English
 
Publisher Excellent publisher