Quotations are hereby invited for the following: Soil and Water Analysis. Specifications: Soil: 1. Sample preparation Drying and Grinding (up to 1 kg); 2. pH; 3. Resistance; 4. Moisture percentage Gravimetric; 5. Particle size; 6. Stone Fraction; 7. Cations exchange capacity (CEC) and extractable cations; 8. Water soluble extract; 9. SAR (Sodium Adsorption Rate); 10. Exchangeable acidity KCI 1 mol dm-³); 11. Titratable Acidity; 12. Carbon (%C); 13. Nitrogen; 14. P & K; 15. Micro-elements (Fe, Mn, Mo, Cl, Cu, Zn, B, S); 16. Heavy Metals (Cd, Cr, Hg, As, Pb, Co, Cr, Ba, Ni, Se); 17. Chloride (Cl); 18. Free Lime (CaCO3); 19. Electrical conductivity (EC); 20. Water retention (Pressure plate -33; 80; -500; - 1500 kPa); 21. Air-water permeability; 22. Modulus of rupture; 23. Density; 24. Atterberg: Liquid & Plastic Limits, Linear Shrinkage, Plasticity Index; 25. Water holding capacity (2 pressures); 26. Total Digestion (Hazard wastes); 27. Sulphur - Calcium phosphate method; 28. X-Ray diffraction (clay minerology). Water: 1. Potability; 2. Irrigation NET_01 & SS NET_02; 3. Total suspended solids; 4. Total dissolved solids. Required at: Prof S.O. Oluwafemi, University of Johannesburg, John Orr Building, Office Room 2114, Doornfontein Campus, Cnr Nind and Beit Street, 2094 Doornfontein, Johannesburg, South Africa. (Тендер №104269945ru)