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Current IssueEditorial BoardOnline First Articles
Indian Journal of
Agricultural Research
Print ISSN: 0367-8245
Online ISSN: 0976-058X
NASS Rating
5.60
SJR
0.217
CiteScore
0.595

Chief Editor:
V. Geethalakshmi
Tamil Nadu Agricultural University Coimbatore, INDIA
Frequency:Monthly
Indexing:
BIOSIS Preview, ISI Citation Index, Biological Abstracts, Elsevier (Scopus and Embase), AGRICOLA, Go...

Indian Journal of Agricultural Research, volume 47 issue 1 (february 2013) : 59-65

PHOSPHATE FRACTIONS AS INFLUENCED BY LONG-TERM PHOSPHORUS FERTILIZATION

B.N. Saha1*, Sushanta Saha1, Parthendu Poddar2, Tek Chand
1Department of Soil Science, CCS Haryana Agricultural University, Hisar-125 004, India

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Cite article:- Saha1* B.N., Saha1 Sushanta, Poddar2 Parthendu, Chand Tek (2025). PHOSPHATE FRACTIONS AS INFLUENCED BY LONG-TERM PHOSPHORUS FERTILIZATION. Indian Journal of Agricultural Research. 47(1): 59-65. doi: .

ABSTRACT

A long-term field experiment on pearl millet-wheat cropping sequence initiated during rabi 1968 using split plot design was selected for present investigation at Soil Research Farm, CCSHAU, Hisar, Haryana. There were eleven treatment combinations related to sources (rock phosphate, nitrophosphate, SSP, DAP and UAP) and levels of P (60 and 120 kg P2O5 ha-1), including one control which were in main plots and three modes of P application were in sub-plots. Continuous application of different phosphatic fertilizers increased Olsen’s available P in soil. The maximum increase of available P was found with DAP (18.0 ppm) and minimum with RP (6.7 ppm). The available P content of the soil in control plot decreased from its original level of 6.6 ppm to 2.7 ppm. Inorganic P fractions revealed that Ca-P was the dominant fraction (78.7%) followed by Al-P (10.1%), Fe-P (7.9%) and saloid-P (3.3%). Increasing levels of P application increased significantly saloid-P, Al-P, Fe-P and Ca-P over lower levels of P application. Saloid-P, Al-P and Fe-P fractions were highly inter-related and they all were significantly correlated with Olsen’s available P in soil.

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