| 21 | Effects of manure and sewage sludge on soil chemical properties and growth of sunflower plants | Najafi N., Mardomi S | Conference of Application of Organic Fertilizers in Horticulture and Sustainable Agriculture | 2010 |
| 22 | Effects of farmyard manure and sewage sludge on uptake and translocation factor of macronutrients and sodium in sunflower | Najafi N., Mardomi S., Oustan S | Conference of Application of Organic Fertilizers in Horticulture and Sustainable Agriculture | 2010 |
| 23 | Effects of soil waterlogging stress on uptake of macronutrients and sodium in sunflower | Najafi N., Mardomi S | 11th Iranian Crop Science Congress | 2010 |
| 24 | Effects of soil waterlogging and NaCl Salinity on growth characteristics of forage corn | Najafi N., Sarhangzadeh E | 11th Iranian Crop Science Congress | 2010 |
| 25 | The effect of foliar application of iron and zinc on yield and morphological traits of German chamomile | Nasiri Y., Zehtab˗Salmasi S., Nasrollahzadeh S., Ghasemi˗Golezani K., Najafi N., Valimohammadi F | 11th Iranian Crop Science Congress | 2010 |
| 26 | Effects of sewage sludge and manure on growth, uptake and concentrations of heavy metals in sunflower | Najafi N., Mardomi S., Oustan S | Fourth Conference and Exhibition of Environmental Engineering | 2010 |
| 27 | Determination of inorganic phosphorus fractions and their relations with each other and available phosphorus in paddy soils of north of Iran | Najafi N., Towfighi H | Proceedings of the 11th Iranian Soil Science Congress | 2009 |
| 28 | Relations of available phosphorus and inorganic phosphorus fractions with rice growth and shoot P concentration in paddy soils of north of Iran | Najafi N., Towfighi H | Proceedings of the 11th Iranian Soil Science Congress | 2009 |
| 29 | Effect of nitrogen form and pH of nutrient solution on the uptake and concentration of K, Ca, Mg and Na in root and shoot of spinach plant | Najafi N., Parsazadeh M., Tabatabaei S.J., Oustan S | Proceedings of the 11th Iranian Soil Science Congress | 2009 |
| 30 | Kinetics of Oxidation of Cr(III) to Cr(VI) in Some Acidic Soils | Hosseini S.R., Oustan S., Aliasghazad N., Najafi N | Proceedings of the 11th Iranian Soil Science Congress | 2009 |
| 31 | Influence of arbuscular mycorrhizal fungi and micronutrients deficiency on leachate pH at different stages of sorghum | Shirmohammadi E., Aliasgharzad N., Oustan S., Najafi N | Proceedings of the 11th Iranian Soil Science Congress | 2009 |
| 32 | Influence of arbuscular mycorrhizal fungi and micronutrients deficiency on chelate compounds produced by sorghum root | Shirmohammadi E., Aliasgharzad N., Oustan S., Najafi N | Proceedings of the 11th Iranian Soil Science Congress | 2009 |
| 33 | The Effects of Source and Amount of Organic Fertilizers and Soil Waterlogging on the Growth Characteristics of Sunflower | Mardomi, S., Najafi N., Oustan S., Baybordi A | Proceedings of the First National Conference of oilseed plants | 2009 |
| 34 | Effect of nitrogen form and pH of nutrient solution on the uptake of Fe, Zn, Cu and Mn by spinach plant in hydroponic culture | Najafi N., Parsazadeh M., Tabatabaei S.J., Oustan S | Proceedings of the First National Congress of Hydroponics and Greenhouse Products | 2009 |
| 35 | Effect of nitrogen form and pH of nutrient solution on the concentrations of phosphorus, nitrate, organic nitrogen and total nitrogen of spinach plant in hydroponic culture | Parsazadeh M., Tabatabaei S.J., Oustan S | Proceedings of the First National Congress of Hydroponics and Greenhouse Products | 2009 |
| 36 | Effect of nitrogen form and pH of nutrient solution on the changes in pH and EC of spinach rhizosphere in hydroponic culture | Najafi N., Parsazadeh M | Proceedings of the First National Congress of Hydroponics and Greenhouse Products | 2009 |
| 37 | Effects of phosphates enzyme and H+ exudation of root on phosphorus uptake by tomato | Aliasgharzad N., Hajiboland R., Hakimelahi G., Najafi N | Proceedings of First National Congress of Sustainable Management and Development of Agriculture in Iran | 2008 |
| 38 | Changes in available phosphorus and inorganic phosphorus fractions after P fertilizer application in paddy soils of north of Iran | Najafi N., Towfighi H | Proceedings of the 12th Iranian Soil Science Congress | 2007 |
| 39 | Changes in available phosphorus and inorganic phosphorus fractions after waterlogging in paddy soils of north of Iran | Najafi N., Towfighi H | Proceedings of the 10th Iranian Soil Science Congress | 2007 |
| 40 | Effects of rhizosphere of rice on the inorganic phosphorus fractions in paddy soils of north of Iran | Najafi N., Towfighi H | Proceedings of the 9th Iranian Soil Science Congress | 2005 |