Eurasian Journal of Soil Science

Volume 14, Issue 1, Jan 2025, Pages 87 - 97
DOI: 10.18393/ejss.1585148
Stable URL: http://ejss.fess.org/10.18393/ejss.1585148
Copyright © 2025 The authors and Federation of Eurasian Soil Science Societies



Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India

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Pachani,S., Kandali,G., Medhi,B., Saikia,L., Basumatary,A., Begum,M., Bhuyan,S., 2025. Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India. Eurasian J Soil Sci 14(1):87 - 97. DOI : 10.18393/ejss.1585148
Pachani,S.Kandali,G.,Medhi,B.Saikia,L.Basumatary,A.Begum,M.,& Bhuyan,S. Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India Eurasian Journal of Soil Science, 14(1):87 - 97. DOI : 10.18393/ejss.1585148
Pachani,S.Kandali,G.,Medhi,B.Saikia,L.Basumatary,A.Begum,M., and ,Bhuyan,S."Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India" Eurasian Journal of Soil Science, 14.1 (2025):87 - 97. DOI : 10.18393/ejss.1585148
Pachani,S.Kandali,G.,Medhi,B.Saikia,L.Basumatary,A.Begum,M., and ,Bhuyan,S. "Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India" Eurasian Journal of Soil Science,14(Jan 2025):87 - 97 DOI : 10.18393/ejss.1585148
S,Pachani.G,Kandali.B,Medhi.L,Saikia.A,Basumatary.M,Begum.S,Bhuyan "Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India" Eurasian J. Soil Sci, vol.14, no.1, pp.87 - 97 (Jan 2025), DOI : 10.18393/ejss.1585148
Pachani,Sukanya ;Kandali,Gayatri Goswami ;Medhi,Binoy Kumar ;Saikia,Lakshi ;Basumatary,Anjali ;Begum,Mahima ;Bhuyan,Samikhya Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India. Eurasian Journal of Soil Science, (2025),14.1:87 - 97. DOI : 10.18393/ejss.1585148

How to cite

Pachani, S., Kandali, G., Medhi, B., Saikia, L., Basumatary, A., Begum, M., Bhuyan, S., 2025. Zeolite-based nano phosphatic fertilizer for enhancing phosphorus availability in acidic soils of Assam, India. Eurasian J. Soil Sci. 14(1): 87 - 97. DOI : 10.18393/ejss.1585148

Author information

Sukanya Pachani , Department of Soil Science, College of Agriculture, Assam Agricultural University, Jorhat – 785013, Assam, India
Gayatri Goswami Kandali , Department of Soil Science, College of Agriculture, Assam Agricultural University, Jorhat – 785013, Assam, India
Binoy Kumar Medhi , Department of Soil Science, College of Agriculture, Assam Agricultural University, Jorhat – 785013, Assam, India
Lakshi Saikia , Materials Sciences & Technology Division, CSIR – North East Institute of Science and Technology, Jorhat – 785006, Assam, India
Anjali Basumatary , Department of Soil Science, College of Agriculture, Assam Agricultural University, Jorhat – 785013, Assam, India
Mahima Begum , Department of Agronomy, College of Agriculture, Assam Agricultural University, Jorhat – 785013, Assam, India
Samikhya Bhuyan , Department of Soil Science and Agricultural Chemistry, Rajiv Gandhi University, Rono Hills, Doimukh, Arunachal Pradesh – 791112, India

Publication information

Article first published online : 14 Nov 2024
Manuscript Accepted : 11 Nov 2024
Manuscript Received: 08 May 2024
DOI: 10.18393/ejss.1585148
Stable URL: http://ejss.fesss.org/10.18393/ejss.1585148

Abstract

Considering the fixation and low availability of conventional phosphatic fertilizer in acidic soil, zeolite based nano phosphatic fertilizer was synthesized to investigate its release characteristics in acidic soil system via invitro studies. Result revealed that surface modification through a cationic surfactant improved the adsorption capacity of zeolite for phosphorus by 60%. Under the incubation study, the zeolite based nano phosphatic fertilizer sustained the release of phosphorous up to 90 days of incubation against 32 days under conventional SSP. The 100% replacement of RDP through nano fertilizer registered the maximum release of P in soil up to 9.36 mg/kg which was 23.80% higher than conventional SSP (7.56 mg/kg). The study release kinetics also revealed parabolic diffusion equation (3.012 µg/g/day) as the most suitable module for describing the P release as compared to other kinetic modules. Thus, zeolite can be used as carrier material for preparation of nano fertilizer for sustainable release of P for longer period of time under acidic soil.

Keywords

Zeolite, nano fertilizer, slow release, acid soil, parabolic diffusion, soil chemistry.

Corresponding author

References

Abdul Majid, S., Ahmad Mir, M., Mir, J.M., 2018. Nitrate and phosphate sorption efficiency of mordenite versus zeolite-A at the convergence of experimental and density functionalized evaluation. Journal of the Chinese Advanced Materials Society 6(4): 691-705.

Akrami, Z., Norouzi, S., Bagherzadeh, M., 2019. Immobilization of modified zeolite on polyethylene surface: characterization and its application towards phosphate removal and microalgae growth. SN Applied Sciences 1(10): 1183.

Arai, Y., Sparks, D.L., 2007. Phosphate reaction dynamics in soils and soil minerals: a multiscale approach. Advances in Agronomy 94: 135-179.

Azadi, A., Baghernejad, M., 2019. Application of kinetic models in describing soil phosphorus release and relation with soil phosphorus fractions across three soil toposequences of calcareous soils. Eurasian Soil Science 52(7): 778-792.

Bansiwal, A.K., Rayalu, S.S., Labhasetwar, N.K., Juwarkar, A.A., Devotta, S., 2006.  Surfactant modified zeolite as a slow release fertilizer for phosphorus. Journal of Agricultural and Food Chemistry 54(13): 4773-4779.

Bhardwaj, P., Sharma, M., Sharma, M., Tomar, R., 2014. Removal and slow release studies of phosphate on surfactant loaded hydrothermally synthesized silicate nanoparticles. Journal of the Taiwan Institute of Chemical Engineers 42(5): 2649-2658.

Bindraban, P.S., Dimkpa, C.O., Pandey, R., 2020. Exploring phosphorus fertilizers and fertilization strategies for improved human and environmental health. Biology and Fertility of Soils 56(3): 299-317.

Chinnamuthu, C.R., Boopathi, P.M., 2009. Nanotechnology and agroecosystem. Madras Agricultural Journal 96(1/6): 17-31.

Conijn, J.G., Bindraban, P.S., Schröder, J.J., Jongschaap, R.E.E., 2018. Can our global food system meet food demand within planetary boundaries? Agriculture, Ecosystems & Environment 251: 244-256.

Cordell, D., Neset, T.S.S., 2014. Phosphorus vulnerability: a qualitative framework for assessing the vulnerability of national and regional food systems to the multi-dimensional stressors of phosphorus scarcity. Global Environmental Change 24: 108-122.

Dhansil, A., Zalawadia, N.M., Prajapat, B.S., Yadav, K., 2018. Effect of nano phosphatic fertilizer on nutrient content and uptake by pearl millet (Pennisetum glaucum L.) crop. International Journal of Current Microbiology and Applied Sciences 7(12): 2327-2337.

Gupta, A.K., Maheshwari, A., Khanam, R., 2020. Assessment of phosphorus fixing capacity in different soil orders of India. Journal of Plant Nutrition 42(15): 2395-2401.

Hagab, R.H., Kotp, Y.H., Eissa, D., 2018. Using nanotechnology for enhancing phosphorus fertilizer use efficiency of peanut bean grown in sandy soil. Journal of Advanced Pharmacy Education and Research 8(3): 59-67.

Ibrahim, E.A., El-Sherbini, M.A.A., Selim, E.M., 2022. Effects of biochar on soil properties, heavy metal availability and uptake, and growth of summer squash grown in metal-contaminated soil. Scientia Horticulturae  301: 111097.

Islas-Espinoza, M., Solís-Mejía, L., Esteller, M.V., 2014. Phosphorus release kinetics in a soil amended with biosolids and vermicompost. Environmental Earth Sciences 71: 1441-1451.

Jakkula, V.S., Wani, S.P., 2018. Zeolites: Potential soil amendments for improving nutrient and water use efficiency and agriculture productivity. Scientific Reviews & Chemical Communications 8(1): 119.

Kumar, K., Smita, L., Cumbal., Debut, A., 2017. Green synthesis of silver nanoparticles using Andean blackberry fruit extract. Saudi Journal of Biological Sciences 24(1): 45-50.

Liu, R., Lal, R., 2014. Synthetic apatite nanoparticles as a phosphorus fertilizer for soybean (Glycine max). Scientific Reports 4: 5686.

Mahmood, M., Tian, Y., Ma, Q., Hui, X., Elrys, A.S., Ahmed, W., Mehmood, S., Wang, Z., 2021. Changes in phosphorus fractions in response to long-term nitrogen fertilization in loess plateau of China. Field Crops Research 270: 108207.

Medhi, B.K., Ruhal, D.S., Singh, C.P., Grover, D.K., Sarma, A., 2012. Effect of levels of phosphate and organic manures on phosphate supplying capacity and P-kinetics in wheat grown in a TypicHaplustept soil. Crop Research 44(1&2): 20-25.

Mikhak, A., Sohrabi,A.,  Kassaee, M.Z., Feizian, M., 2017. Synthetic nanozeolite/nanohydroxyapatite as a phosphorus fertilizer for German chamomile (Matricariachamomilla L.). Industrial Crops and Products 95: 444-452.

Mir, J.M., Ahmad Mir, M., Abdul Majid, S., 2020. Molecular electron density and nitrate-phosphate sorption efficiency of zeolite-A: physico-chemical and DFT analyses. Indian Journal of Chemistry 59A: 939-947.

Montalvo, D., Mclaughlin, M.J, Degryse, F., 2015. Efficacy of hydroxyapatite nanoparticles as phosphorus fertilizer in andisols and oxisols. Soil Science Society of America Journal 79: 551-558.

Noruzi, M., Hadian, P., Soleimanpour, L., Ma’mani, L., Shahbazi, K., 2023. Hydroxyapatite nanoparticles: an alternative to conventional phosphorus fertilizers in acidic culture media. Chemical and Biological Technologies in Agriculture 10(1): 71-76.

Poddar, K., Vijayan, J., Ray, S., Adak, T., 2018. Nanotechnology for sustainable agriculture. In:  Biotechnology for Sustainable Agriculture : Emerging Approaches and Strategies. Singh, R.L., Mondal, S. (Eds.). Woodhead Publishing, pp.281-303.

Prakash, D., Benbi, D.K., Saroa, G.S., 2017. Clay, organic carbon, available P and calcium carbonate effects on phosphorus release and sorption-desorption kinetics in alluvial soils. Communications in Soil Science and Plant Analysis 48(1): 92-106.

Prüter, J., Leipe, T., Michalik, D., Klysubun, W., Leinweber, P., 2020. Phosphorus speciation in sediments from the Baltic Sea, evaluated by a multi-method approach. Journal of Soils and Sediments 20: 1676-1691.

Salako, O., Kovo, A.S., Abdulkareem, A.S., Yusuf, S.T., Afolabi, E.A., Auta, M., 2020. The effect of synthesized NPK loaded surfactant modified zeolite A based fertilizer in tomato (Lycopersycum esclentum) cultivation. Journal of Nigerian Society of Chemical Engineers 35(1): 50-63.

Sanyal, S.K., 2018. A textbook of soil chemistry.  Astral International Pvt. Limited, India. 306p.

Sharpley, A., Jarvie, H., Flaten, D., Kleinman, P., 2018. Celebrating the 350th anniversary of phosphorus discovery: A conundrum of deficiency and excess. Journal of Environmental Quality 47(4): 774-777 .

Singh, D.J.. Sarkar, S.D., Mittal, S., Dhaka, R., Maiti, P., Singh, A., Raghav, T., Solanki, D., Ahmed, N., Singh, S.B., 2018. Zeolite reinforced carboxymethyl cellulose-Na+-g-cl-poly(AAm) hydrogel composites with pH responsive phosphate release behaviour. Journal of Applied Polymer Science 136(15): 47332.

Singh, P., Prakash, D., 2014. Phosphorus dynamics in soils as influenced by the application of organic sources: A review. Indian Journal of Fertilisers. 10(10): 16-26.

Solanki, P., Bhargava, A., Chhipa, H., Jain, N., Panwar, J. 2015. Nano-fertilizers and their smart delivery system. In: Nanotechnologies in food and agriculture. Rai, M., Ribeiro, C., Mattoso, L., Duran, N. (Eds.). Springer, Cham. pp. 81-101.

Sparks, D.L., 2003. Environmental soil chemistry. Elsevier, 352p.

Subramanian, K.S., Thirunavukkarasu, M., 2017. Nano-fertilizers and nutrient transformations in soil. In: Nanoscience and Plant–Soil Systems. Ghorbanpour, M., Manika, K., Varma, A. (Eds.). Springer Cham. pp. 305-319.

Tarafdar, J.C., Rathore, I., Thomas, E., 2015. Enhancing nutrient use efficiency through nano technological interventions. Indian Journal of Fertilizers 11(12): 46-51.

Wahid, F., Fahad, S., Danish, S., Adnan, M., Yue, Z., Saud, S., Siddiqui, M.H., Brtnicky, M., Hammerschmiedt, T., Datta, R.,  2020. Sustainable management with mycorrhizae and phosphate solubilizing bacteria for enhanced phosphorus uptake in calcareous soils. Agriculture 10(8): 334.

Wakelin, S.A., Condron, L.M., Gerard, E., Dignam, B.E.A., Black, A., O’Callaghan, M., 2017. Long-term P fertilisation of pasture soil did not increase soil organic matter stocks but increased microbial biomass and activity. Biology and Fertility of Soils 53: 511-521.

Wei, Y.X., Ye, Z.F., Wang, Y.L., Ma, M.G., Li, Y.F., 2011. Enhanced ammonia nitrogen removal using consistent ammonium exchange of modified zeolite and biological regeneration in a sequencing batch reactor process. Environmental Technology 32(12): 1337–1343.

Wilson, J.. Elliott, J., Macrae, M., Glenn, A., 2019.  Near‐surface soils as a source of phosphorus in snowmelt runoff from cropland. Journal of Environmental Quality 48(4): 921-930.

Yan, Z., Lin, Z., Kai, M., Guozhu, M., 2014. The surface modification of zeolite 4A and its effect on the water-absorption capability of starch-g-poly (acrylic acid) composite. Clay and Clay Minerals 62(3): 211-223.

Abstract

Considering the fixation and low availability of conventional phosphatic fertilizer in acidic soil, zeolite based nano phosphatic fertilizer was synthesized to investigate its release characteristics in acidic soil system via invitro studies. Result revealed that surface modification through a cationic surfactant improved the adsorption capacity of zeolite for phosphorus by 60%. Under the incubation study, the zeolite based nano phosphatic fertilizer sustained the release of phosphorous up to 90 days of incubation against 32 days under conventional SSP. The 100% replacement of RDP through nano fertilizer registered the maximum release of P in soil up to 9.36 mg/kg which was 23.80% higher than conventional SSP (7.56 mg/kg). The study release kinetics also revealed parabolic diffusion equation (3.012 µg/g/day) as the most suitable module for describing the P release as compared to other kinetic modules. Thus, zeolite can be used as carrier material for preparation of nano fertilizer for sustainable release of P for longer period of time under acidic soil.

Keywords: Zeolite, nano fertilizer, slow release, acid soil, parabolic diffusion, soil chemistry.

References

Abdul Majid, S., Ahmad Mir, M., Mir, J.M., 2018. Nitrate and phosphate sorption efficiency of mordenite versus zeolite-A at the convergence of experimental and density functionalized evaluation. Journal of the Chinese Advanced Materials Society 6(4): 691-705.

Akrami, Z., Norouzi, S., Bagherzadeh, M., 2019. Immobilization of modified zeolite on polyethylene surface: characterization and its application towards phosphate removal and microalgae growth. SN Applied Sciences 1(10): 1183.

Arai, Y., Sparks, D.L., 2007. Phosphate reaction dynamics in soils and soil minerals: a multiscale approach. Advances in Agronomy 94: 135-179.

Azadi, A., Baghernejad, M., 2019. Application of kinetic models in describing soil phosphorus release and relation with soil phosphorus fractions across three soil toposequences of calcareous soils. Eurasian Soil Science 52(7): 778-792.

Bansiwal, A.K., Rayalu, S.S., Labhasetwar, N.K., Juwarkar, A.A., Devotta, S., 2006.  Surfactant modified zeolite as a slow release fertilizer for phosphorus. Journal of Agricultural and Food Chemistry 54(13): 4773-4779.

Bhardwaj, P., Sharma, M., Sharma, M., Tomar, R., 2014. Removal and slow release studies of phosphate on surfactant loaded hydrothermally synthesized silicate nanoparticles. Journal of the Taiwan Institute of Chemical Engineers 42(5): 2649-2658.

Bindraban, P.S., Dimkpa, C.O., Pandey, R., 2020. Exploring phosphorus fertilizers and fertilization strategies for improved human and environmental health. Biology and Fertility of Soils 56(3): 299-317.

Chinnamuthu, C.R., Boopathi, P.M., 2009. Nanotechnology and agroecosystem. Madras Agricultural Journal 96(1/6): 17-31.

Conijn, J.G., Bindraban, P.S., Schröder, J.J., Jongschaap, R.E.E., 2018. Can our global food system meet food demand within planetary boundaries? Agriculture, Ecosystems & Environment 251: 244-256.

Cordell, D., Neset, T.S.S., 2014. Phosphorus vulnerability: a qualitative framework for assessing the vulnerability of national and regional food systems to the multi-dimensional stressors of phosphorus scarcity. Global Environmental Change 24: 108-122.

Dhansil, A., Zalawadia, N.M., Prajapat, B.S., Yadav, K., 2018. Effect of nano phosphatic fertilizer on nutrient content and uptake by pearl millet (Pennisetum glaucum L.) crop. International Journal of Current Microbiology and Applied Sciences 7(12): 2327-2337.

Gupta, A.K., Maheshwari, A., Khanam, R., 2020. Assessment of phosphorus fixing capacity in different soil orders of India. Journal of Plant Nutrition 42(15): 2395-2401.

Hagab, R.H., Kotp, Y.H., Eissa, D., 2018. Using nanotechnology for enhancing phosphorus fertilizer use efficiency of peanut bean grown in sandy soil. Journal of Advanced Pharmacy Education and Research 8(3): 59-67.

Ibrahim, E.A., El-Sherbini, M.A.A., Selim, E.M., 2022. Effects of biochar on soil properties, heavy metal availability and uptake, and growth of summer squash grown in metal-contaminated soil. Scientia Horticulturae  301: 111097.

Islas-Espinoza, M., Solís-Mejía, L., Esteller, M.V., 2014. Phosphorus release kinetics in a soil amended with biosolids and vermicompost. Environmental Earth Sciences 71: 1441-1451.

Jakkula, V.S., Wani, S.P., 2018. Zeolites: Potential soil amendments for improving nutrient and water use efficiency and agriculture productivity. Scientific Reviews & Chemical Communications 8(1): 119.

Kumar, K., Smita, L., Cumbal., Debut, A., 2017. Green synthesis of silver nanoparticles using Andean blackberry fruit extract. Saudi Journal of Biological Sciences 24(1): 45-50.

Liu, R., Lal, R., 2014. Synthetic apatite nanoparticles as a phosphorus fertilizer for soybean (Glycine max). Scientific Reports 4: 5686.

Mahmood, M., Tian, Y., Ma, Q., Hui, X., Elrys, A.S., Ahmed, W., Mehmood, S., Wang, Z., 2021. Changes in phosphorus fractions in response to long-term nitrogen fertilization in loess plateau of China. Field Crops Research 270: 108207.

Medhi, B.K., Ruhal, D.S., Singh, C.P., Grover, D.K., Sarma, A., 2012. Effect of levels of phosphate and organic manures on phosphate supplying capacity and P-kinetics in wheat grown in a TypicHaplustept soil. Crop Research 44(1&2): 20-25.

Mikhak, A., Sohrabi,A.,  Kassaee, M.Z., Feizian, M., 2017. Synthetic nanozeolite/nanohydroxyapatite as a phosphorus fertilizer for German chamomile (Matricariachamomilla L.). Industrial Crops and Products 95: 444-452.

Mir, J.M., Ahmad Mir, M., Abdul Majid, S., 2020. Molecular electron density and nitrate-phosphate sorption efficiency of zeolite-A: physico-chemical and DFT analyses. Indian Journal of Chemistry 59A: 939-947.

Montalvo, D., Mclaughlin, M.J, Degryse, F., 2015. Efficacy of hydroxyapatite nanoparticles as phosphorus fertilizer in andisols and oxisols. Soil Science Society of America Journal 79: 551-558.

Noruzi, M., Hadian, P., Soleimanpour, L., Ma’mani, L., Shahbazi, K., 2023. Hydroxyapatite nanoparticles: an alternative to conventional phosphorus fertilizers in acidic culture media. Chemical and Biological Technologies in Agriculture 10(1): 71-76.

Poddar, K., Vijayan, J., Ray, S., Adak, T., 2018. Nanotechnology for sustainable agriculture. In:  Biotechnology for Sustainable Agriculture : Emerging Approaches and Strategies. Singh, R.L., Mondal, S. (Eds.). Woodhead Publishing, pp.281-303.

Prakash, D., Benbi, D.K., Saroa, G.S., 2017. Clay, organic carbon, available P and calcium carbonate effects on phosphorus release and sorption-desorption kinetics in alluvial soils. Communications in Soil Science and Plant Analysis 48(1): 92-106.

Prüter, J., Leipe, T., Michalik, D., Klysubun, W., Leinweber, P., 2020. Phosphorus speciation in sediments from the Baltic Sea, evaluated by a multi-method approach. Journal of Soils and Sediments 20: 1676-1691.

Salako, O., Kovo, A.S., Abdulkareem, A.S., Yusuf, S.T., Afolabi, E.A., Auta, M., 2020. The effect of synthesized NPK loaded surfactant modified zeolite A based fertilizer in tomato (Lycopersycum esclentum) cultivation. Journal of Nigerian Society of Chemical Engineers 35(1): 50-63.

Sanyal, S.K., 2018. A textbook of soil chemistry.  Astral International Pvt. Limited, India. 306p.

Sharpley, A., Jarvie, H., Flaten, D., Kleinman, P., 2018. Celebrating the 350th anniversary of phosphorus discovery: A conundrum of deficiency and excess. Journal of Environmental Quality 47(4): 774-777 .

Singh, D.J.. Sarkar, S.D., Mittal, S., Dhaka, R., Maiti, P., Singh, A., Raghav, T., Solanki, D., Ahmed, N., Singh, S.B., 2018. Zeolite reinforced carboxymethyl cellulose-Na+-g-cl-poly(AAm) hydrogel composites with pH responsive phosphate release behaviour. Journal of Applied Polymer Science 136(15): 47332.

Singh, P., Prakash, D., 2014. Phosphorus dynamics in soils as influenced by the application of organic sources: A review. Indian Journal of Fertilisers. 10(10): 16-26.

Solanki, P., Bhargava, A., Chhipa, H., Jain, N., Panwar, J. 2015. Nano-fertilizers and their smart delivery system. In: Nanotechnologies in food and agriculture. Rai, M., Ribeiro, C., Mattoso, L., Duran, N. (Eds.). Springer, Cham. pp. 81-101.

Sparks, D.L., 2003. Environmental soil chemistry. Elsevier, 352p.

Subramanian, K.S., Thirunavukkarasu, M., 2017. Nano-fertilizers and nutrient transformations in soil. In: Nanoscience and Plant–Soil Systems. Ghorbanpour, M., Manika, K., Varma, A. (Eds.). Springer Cham. pp. 305-319.

Tarafdar, J.C., Rathore, I., Thomas, E., 2015. Enhancing nutrient use efficiency through nano technological interventions. Indian Journal of Fertilizers 11(12): 46-51.

Wahid, F., Fahad, S., Danish, S., Adnan, M., Yue, Z., Saud, S., Siddiqui, M.H., Brtnicky, M., Hammerschmiedt, T., Datta, R.,  2020. Sustainable management with mycorrhizae and phosphate solubilizing bacteria for enhanced phosphorus uptake in calcareous soils. Agriculture 10(8): 334.

Wakelin, S.A., Condron, L.M., Gerard, E., Dignam, B.E.A., Black, A., O’Callaghan, M., 2017. Long-term P fertilisation of pasture soil did not increase soil organic matter stocks but increased microbial biomass and activity. Biology and Fertility of Soils 53: 511-521.

Wei, Y.X., Ye, Z.F., Wang, Y.L., Ma, M.G., Li, Y.F., 2011. Enhanced ammonia nitrogen removal using consistent ammonium exchange of modified zeolite and biological regeneration in a sequencing batch reactor process. Environmental Technology 32(12): 1337–1343.

Wilson, J.. Elliott, J., Macrae, M., Glenn, A., 2019.  Near‐surface soils as a source of phosphorus in snowmelt runoff from cropland. Journal of Environmental Quality 48(4): 921-930.

Yan, Z., Lin, Z., Kai, M., Guozhu, M., 2014. The surface modification of zeolite 4A and its effect on the water-absorption capability of starch-g-poly (acrylic acid) composite. Clay and Clay Minerals 62(3): 211-223.



Eurasian Journal of Soil Science