Phosphorus sorption characteristics of some representative soils of south India

Rashmi, I.; Biswas, A.K.; Parama, V. R. R.; Rao, A. Subba

doi:10.3329/sja.v13i1.24176

Cited by 9 publications

(7 citation statements)

References 13 publications

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“…is is consistent with Rashmi et al [31], who showed that the P sorbed and equilibrium P concentrations increased with increasing P addition. e results indicate that both the Freundlich and Langmuir P sorption models were well fitted as evidenced by higher R 2 and lower SE values.…”

Section: Discussionsupporting

confidence: 92%

Phosphorous Sorption Characteristics of Soils in Smallholding Land Use in Southern Ethiopia

Lulu

Lemma

Melese

2022

Applied and Environmental Soil Science

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Purpose. This study evaluated the P sorption characteristics of soils under smallholding land use in Wolaita Zone, Southern Ethiopia. Methods. Soil samples (0–20 cm) were collected from each of the home garden, grazing land, cropland, and woodlot in three replications at two sites and analyzed for P sorption isotherm data and selected soil properties. Results. The P sorption data were generated by equilibration with P solutions and the data were fitted with the Freundlich model (r2 = 0.88–0.98, SE = 0.16–0.24) and Langmuir model (r2 = 0.81–0.98, SE = 0.45–1.71). The Langmuir P sorption maximum (Qmax) and Freundlich sorption coefficient (Kf) were the highest in the cropland soils while these parameters were the lowest in the home garden. Maximum buffering capacity (MBC) was in the order cropland > woodlot > home garden > grazing land, but Freundlich P buffering capacity (PBC) followed the order cropland > grazing land > home garden > woodlot. Langmuir bonding energy (bL) and Freundlich phosphate sorption affinity (1/n) were in the order of home garden > woodlot > grazing land > cropland. The Qmax was positively correlated (p < 0.05) with clay, Kf, PBC, the oxalate and dithionates extractable Al, Fe, and Mn, but it negatively correlated (p < 0.05) with soil pH, SOC, AP and bL. Conclusion. Generally, the effect of P sorption of the smallholding home garden was slightly different from eucalyptus woodlot and grazing lands but considerably different from cropland. The high P sorption capacity in cropland was attributed to the high amorphous and crystalline Fe/Al oxides/hydroxides, low SOC, and low soil pH. Hence, combinations of P managements are required for increasing P availability in the smallholding land uses.

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Section: Discussionsupporting

confidence: 92%

Phosphorous Sorption Characteristics of Soils in Smallholding Land Use in Southern Ethiopia

Lulu

Lemma

Melese

2022

Applied and Environmental Soil Science

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Section: Resultsmentioning

confidence: 99%

“…At low concentration, the relationship was linear, whereas it deviated from linearity at high concentrations. The linearity between equilibrium P concentrations versus rate of P sorbed was due to large intermolecular distance between P ions resulting in negligible mutual repulsion, whereas the deviation from linearity indicates the decrease in the binding affinity of soil to P with increasing surface saturation with P(Rashmi et al, 2015).The P sorption data were adequately fitted with the model according to the Freundlich and Langmuir equations for the three soils of the study sites. The data showed satisfactory agreements with both Freundlich (R 2 > 0.90) and Langmuir (R 2 > 0.95) equations.…”

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confidence: 95%

Phosphorus sorption characteristics as influenced by major soil units in southern Ethiopia

Lambano¹,

Beyene

Abera

2022

J. Plant Nutr. Soil Sci.

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Background Limited soil nutrients in the soil are threat in crop production in Ethiopian soil. Low availability of phosphorus (P) is one amongst the most important crop yield‐limiting problems among the various reasons limiting P availability in tropical soils, P sorption is that the major one. Aim Therefore, this study was done to identify P sorption characteristics of andosols, vertisols, and nitisols in Tachegnawgimbicho, Taba, and DelboAtwaro study sites in southern Ethiopia. Methods Adsorption isotherms experiment was done using Langmuir and Freundlich models to spot the character of soils in their capability on P sorption and causation and to explain P sorption as influenced by the associated soil properties using SAS version 9.00. Results The P sorption maxima (Xm) of andosols, vertisols, and nitisols were found to be 965, 810, and 706 μg g−1, respectively. Correlation analysis indicated that soil pH was negatively and significantly correlated with Xm (R2 = −0.88). The Langmuir affinity constant “k” was positively and significantly correlated (R2 = 0.981) with maximum phosphorus buffering capacity (MPBC) indicating bonding energy constant is a component of buffering capacity of soils. The Langmuir equation correlated significantly with P sorption maximum “b” and binding energy “k” indicating both parameters can be used for evaluating P sorption characteristics of the soils. Conclusion In this finding, the path analysis coefficient revealed that clay and pH had direct effects on P sorption parameters. Sorption capacity is high in andosols followed by nitisols and vertisols. Andosols require more P fertilizer to maintain optimum P concentration in soil solution for crop growth as compared with nitisols and vertisols.

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“…The availability of P element for plants is often limited since the majority of the elements are insoluble form. Rashmi et al (2015) stated that Langmuir and Freundlich's model was acceptable to describe phosphate ion absorption on soil colloid surface where the presence of clay. Al and Fe elements guided the capacity of ion absorption by soil colloid.…”

Section: Discussionmentioning

confidence: 99%

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2017

RJOAS

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The study provides information on approaches to the problem of ensuring of Food security in the country. The levels and the models of Food security and the theoretical aspects of national Food security are investigated in this research. It was found that there are five levels of Food security that go from total autonomy in the food supply to the total dependence from the exporters. The models also represent the ideas from two different approaches to the economy: Protectionism and Free Market. The strategic goal of Food security is to provide the population of the country with the safe agricultural and fish products. International specialization and cooperation contributes to the achievement of food supply and demand balance that helps to prevent food crises and ensure Food security at the international level. Stability of domestic production, as well as the availability of the necessary resources is the guarantee for achieving of national Food security. This study provides evidence that the competitiveness of national business in food market should be increased to develop Economy and to ensure Food security. This problem could be solved due to the mobilization of competitive advantages of domestic companies. For Russian food and trade companies main competitive advantages are: natural resources, unoccupied territories, production facilities, cheap labor force and cooperation with other Russian organizations and international business. In conclusion it was mentioned that to enhance the food manufacturers' competitive potential it is necessary to create a fair trading environment that ensures Food security for the population and allows Russian manufacturers of different sizes to grow.

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Phosphorus sorption characteristics of some representative soils of south India

Cited by 9 publications

References 13 publications

Phosphorous Sorption Characteristics of Soils in Smallholding Land Use in Southern Ethiopia

Phosphorous Sorption Characteristics of Soils in Smallholding Land Use in Southern Ethiopia

Phosphorus sorption characteristics as influenced by major soil units in southern Ethiopia

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