A comparison of 5 soil phosphorus extraction methods applied to different soils of South of Iran

2018 ◽  
Vol 49 (18) ◽  
pp. 2284-2290
Author(s):  
Roghayeh Shahriaripour ◽  
Ahmad Tajabadipour ◽  
Isa Esfandiarpoor ◽  
Vahid Mozafary
Keyword(s):  
Soil Phosphorus ◽  
Extraction Methods ◽  
Phosphorus Extraction ◽  
Different Soils

scholarly journals Relative Suitability of Phosphorus Extraction Procedures for F Tropical Ferralsol

2020 ◽  
pp. 27-35
Author(s):  
J. S. Tenywa ◽  
E. Odama ◽  
A. K. Amoding
Keyword(s):  
Soil Phosphorus ◽  
Extraction Methods ◽  
P Uptake ◽  
Strong Positive Correlation ◽  
Predictive Capacity ◽  
Soil P ◽  
Application Rates ◽  
Plant P Uptake ◽  
Phosphorus Extraction ◽  
P Application

Purpose: To evaluate the predictive capacity common procedures for soil P extraction and testing in laboratories in the region. Materials and Methods: A pot study with treatments viz. soil phosphorus extraction methods (Bray I, Bray II and Mehlich 3), and six P application rates (0, 20, 40, 60, 80 and 100 kg P ha-1). Maize (Zea mays L.) variety Longe IV was the test crop. A Ferralsol from northwestern Uganda (West Nile) was used in this study. Results and Conclusion: Mehlich 3 correlated most with plant P uptake by presenting the highest correlation coefficient with plant P content (r = 0.254) and a number of leaves per plant (r = 0.733). A strong positive correlation existed between Bray I and Mehlich 3 extractable P values (r = 0.975), suggesting lack of a marked difference between them; implying that either of the two procedures could be applied for soil P extraction in Ferralsols. However, Mehlich 3, being a multi-nutrient extractant, was recommended as the most suitable for P extraction for the Ferralsol used in this study.

scholarly journals A comparison of 14 soil phosphorus extraction methods applied to 50 agricultural soils from Central Europe

2016 ◽  
Vol 61 (No. 2) ◽  
pp. 86-96 ◽  
Author(s):  
R. Wuenscher ◽  
H. Unterfrauner ◽  
R. Peticzka ◽  
F. Zehetner
Keyword(s):  
Central Europe ◽  
Agricultural Soils ◽  
Soil Phosphorus ◽  
Extraction Methods ◽  
Phosphorus Extraction

Comparison of Mehlich 3, AL and artificial root exudates containing extractants for soil phosphorus analysis

2020 ◽  
Author(s):  
Tonu Tonutare ◽  
Gert Kaldmae ◽  
Tiina Köster ◽  
Kadri Krebstein ◽  
Ako Rodima
Keyword(s):  
Root Exudates ◽  
Soil Phosphorus ◽  
Extraction Methods ◽  
Solution Chemistry ◽  
Soil Science ◽  
Available Phosphorus ◽  
Plant Analysis ◽  
Soil P ◽  
Fertilizer Recommendations

<p>Due to increase of fertilizers prices and tightening of environmental protection requirements the need for efficient use of fertilizers has increased. At moment over the word huge number of different methods for determination of soil plant available phosphorus (PAP) are in use. Due to unequal extraction ability of extractants have each method own specific gradation to evaluate the soil P class. Allmost all widely used PAP extraction methods are developed in last century, mostly more than fifty years ago and often there is not possible to found information how the P status classes and fertilizer recommendations are determined for each method is determined.</p><p>The content of PAP in soil is difficult to estimate because soil pH has a strong effect to soil  - solution chemistry. Therefore extracting  soils with higly buffered solutions as for example Mehlich 3 can give overestimated results. The acidic Mehlich  3 extactant can solubilize relatively insoluble Ca- Fe- and Al phosphates. Also the AL (acetate-lactate) method uses the buffered extraction solution and may influence the amount of extracted PAP. The most realistic conditions for PAP extraction can give the extraction solution which mimic the soil environment that has actively growing roots. </p><p>The aim of our research was to investigate the extraction of PAP with extragent similar by chemical composition to soil solution with root exudates proposed by Haney et al (2010).  The obtained results were compared with Mehlich 3 and AL methods results.    </p><p>Ref.: Haney, R.L., Haney, E.B., Hossner, L.R., Arnold, J,G. 2010. Modification to the New Soil Extractant H3A-1: A Multinutrient Extractant. Communications in Soil Science and Plant Analysis, 41:1513-1523.</p>

scholarly journals Chemical Transformation of Humic Acid Molecules under the Influence of Mineral, Fungal and Bacterial Fertilization in the Context of the Agricultural Use of Degraded Soils

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4921
Author(s):  
Patrycja Boguta ◽  
Kamil Skic ◽  
Zofia Sokołowska ◽  
Magdalena Frąc ◽  
Lidia Sas-Paszt
Keyword(s):  
Sandy Soil ◽  
Paenibacillus Polymyxa ◽  
Extraction Methods ◽  
Organic Carbon Content ◽  
Npk Fertilizers ◽  
Silty Soil ◽  
Vis Spectroscopy ◽  
Humification Degree ◽  
Agricultural Use ◽  
Different Soils

The main goal of this work was to study the structural transformation of humic acids (HAs) under the influence of selected strains of fungi (Aspergillus niger and Paecilomyces lilacinus) and bacteria (Bacillus sp., Paenibacillus polymyxa and Bacillus amyloliquefaciens) with/without the presence of NPK fertilizers. Two-year experiments were conducted on two different soils and HAs isolated from these soils were examined for structure, humification degree, and quantity using fluorescence and UV-Vis spectroscopy, elemental analysis, and extraction methods. Results showed that the applied additives contributed to the beneficial transformation of HAs, but effects differed for various soils. HAs from silty soil with higher organic carbon content showed simplification of their structure, and decreases in humification, molecular weight, and aromaticity under the influence of fungi and bacteria without NPK, and with NPK alone. With both fungi and NPK, increases in O/H and O/C atomic ratios indicated an increase in the number of O-containing functional groups. HAs from sandy soil did not show as many significant changes as did those from silty soil. Sandy soil exhibited a strong decline in HA content in the second year that was reduced/neutralized by the presence of fungi, bacteria, and NPK. Periodically observed fluorescence at ~300 nm/450 nm reflected formation of low-molecular HAs originating from the activity of microorganisms.

Ion-Sink Phosphorus Extraction Methods Applied on 24 Soils from the Continental USA

2005 ◽  
Vol 69 (2) ◽  
pp. 511-521 ◽  
Author(s):  
R. G. Myers ◽  
A. N. Sharpley ◽  
S. J. Thien ◽  
G. M. Pierzynski
Keyword(s):  
Extraction Methods ◽  
Phosphorus Extraction
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