Interpolation of Soil Nutrients (Nitrate and Phosphate), Organic Carbon, EC and pH in Agricultural Lands to the South of Tehran City

Document Type : علمی - پژوهشی


1 MSc. Graduate of Environmental Pollutants, Department of Environmental Pollutants Research, Environmental Sciences Research Institute, University of Shahid Beheshti, Tehran, Iran

2 Department of Environmental Pollutants Research, Environmental Sciences Research Institute, University of Shahid Beheshti, Tehran, Iran

3 Department of Agro-ecology, Environmental Sciences Research Institute, University of Shahid Beheshti, Tehran, Iran


In this study, 83 sampling points were chosen in the study area. Sampling was conducted at two soil depths (0-30 cm and 30-60 cm) and the concentrations of nitrate, phosphate, EC, pH and organic carbon were determined.  Interpolation maps were created using the IDW method. These showed that in the top soil, soil phosphorus, EC and OC have the maximum concentration in the northern part of the area and nitrate in the southern part of the area; in second depth soil, phosphorus has the maximum concentration in the North of the area and nitrate and EC in the South of the area, while OC has a uniform distribution over the whole area. Analysis of soil chemical properties showed high concentrations of nitrate and phosphate in the upper soil layer in the studied areas, mainly due to the use of untreated urban wastewater and chemical fertilizers by the farmers; in addition, results of organic carbon measurement showed that this area has a good condition in terms of organic matters. Soil pH in the area was alkaline and EC decreased at a lower depth. The results of Spearman correlation analysis showed that EC has a positive correlation with nitrate and a negative correlation with phosphate at both depths. Also, organic carbon has a positive correlation with soil phosphate in the top soil.


  1. منابع
  2. Telysheva G, Jashina L, Lebedeva G, Dizhbite T, Solodovnik V, Mutere O, Grigiškis S, Baškys E, Aikaite, J. USE OF PLANTS TO REMEDIATE SOIL POLLUTED WITH OIL. Proceedings of
  3. the 8th International Scientific and Practical Conference; 2011;Volume 1.
  4. Bibordi M. Soil physic. University of Tehran; 2011. [In Persian]
  5. Maliszewska-Kordybach B, Smreczak B, Klimkowicz-Pawlas A. Concentrations, sources, and spatial distribution of individual polycyclic aromatic hydrocarbons (PAHs) in agricultural soils in the Eastern part of the EU: Poland as a case study. [Research Support, Non-U S Gov't]. Sci Total Environ; 2009; 407(12): 3746-3753.
  6. Krasilnikov P., Sidorova V. Geostatistical analysis of the spatial structure of acidity and organic carbon in zoned soil of the Russian plain. Soil geography and geostatistics. European commission, EUR 23290, EN-Luxembourg; 2008; p.55-67.
  7. Bou Kheir R, Greve M H, Bocher P K, Greve MB. Use of Digital Terrain Analysis and Classification Trees for Predictive Mapping of Soil Organic Carbon in Southern Denmark. Hydrol. Earth Syst. Sci.; 2010;14: 847–857.
  8. Xu J, Wu L, Chang A C, Zhang Y. Impact of long-term reclaimed wastewater irrigation on agricultural soils: A preliminary assessment. Journal of Hazardous Materials; 2010; 183: 780–786.
  9. Aishah A W, Zauyah S, Anuar A R. Fauziah C I. Spatial Variability of Selected Chemical Characteristics of Paddy Soils in Sawah Sempadan, Selangor, Malaysia. Malaysian Journal of Soil Science; 2010; 14: 27-39.
  10. Mohammad Rusan M J, Hinnawi S, Rousan L. Long term effect of wastewater irrigation of forage crops on soil and plant quality parameters. Desalination; 2007; 215(1–3): 143-152.
  11. Al-Nakshabandi G A, Saqqar M M, Shatanawi M R, Fayyad M, Al-Horani H. Some environmental problems associated with the use of treated wastewater for irrigation in Jordan. Agricultural Water Management; 1997; 34(1): 81–94.
  12. Sys C, Van Ranst E, Debaveye J. Beernaert F. Land evaluation, Part 2, Crop requirement. Agricultural publication, General Administration for Development Cooperation; 1993; 1050 Brussels– Belgiun.
  13. Zema, D A, Bombino B, Andiloro A, Zimbone S M. Irrigation of energy crops with urban wastewater: Effects on biomass yields, soils and heating values. Agricultural Water Management; 2012; 115: 55–65.
  14. Zhang J, Yang J C, Wang R Q, Hou H, Du X M, Fan S K, Dai J L. Effects of pollution sources and soil properties on distribution of polycyclic aromatic hydrocarbons and risk assessment. Science of the Total Environment; 2013; 463–464(0): 1-10.
  15. Onweremadu E. U. Duruigbo C. I. Assessment of Cd concentration of crude oil polluted arable soils. Int. J. Environ. Sci. Tech; 2007; 4(3): 409-412.
  17. Wei X, Qiu L, Shao M, Zhang X, Gale W. The Accumulation of Organic Carbon in Mineral Soils by Afforestation of Abandoned Farmland. PLoSONE; 2012; 7(3).
  18. Shi Y C, Hu Z Y, Haneklaus S, Long W G, Xia X, Zhao Y W, Schnug E. Suitability of soil electrical conductivity as an indicator of soil nitrate status in relation to vegetable cultivation practices in the Yangtze River Delta of China. Agriculture and Forestry Research; 2009; 2(59): 151-158.
  19. Zhang X, Chen L, Fu B, Li Q, Qi X, Ma Y. Soil organic carbon changes as influenced by agricultural land use and management: a case study in Yanhuai Basin, Beijing, China. Acta Ecologica Sinica; 2006; 26(10): 3198-3203.
  20. Malakoti M J. Sustainable Agriculture. Karaj, Vaziri; 2000; p. 460. [in Persian]
  21. Ben Mussa S A, Hawaa S E, Faiza A H, Fatma F A. Determination of Available Nitrate, Phosphate and Sulfate in Soil Samples. International Journal of PharmTech Research; 2009; 1(3): 598-604.
  22. Westfall D G, Davis J G. Fertilizing maize. Colorado State Univ. Coop. Ext., Service in Action; 2009; no. 0.538.
  23. Parker D. Controlling agricultural nonpoint water pollution: costs of implementing the Maryland Water Quality Improvement Act of 1998. Agricultural Economics; 2000; 24: 23–31.
  24. Thabang S M. Assessment of infield spatial variability of nutrients in a uniformly managed corn (Zea mays L.) field. FACULTY OF SCIENCE AND AGRICULTURE (School of
  25. Agriculture & Environmental Science), UNIVERSITY OF LIMPOPO, South African; 2011.
  26. Soil Phosphorus Limits Committee and LandWise Inc. Phosphorus standards in Alberta: Potential impacts on the agricultural industry. 57 pp. InAlberta Soil Phosphorus Limits Project. Volume 5: Background information and reviews. Alberta Agriculture, Food and Rural Development, Lethbridge, Alberta, Canada; 2006.
  27. Margane A. Steinel A. Proposed National Standard for Treated Domestic Wastewater Reuse for Irrigation, BMZ-No.: 2008.2162.9; 2011; P: 42.