1. Abdel-Hamid MA, Abdel-Aal SI, Abdel Fattah A (2003) The relative residual effectiveness of superphosphate fertilizer and phosphate rock in Torripsamments. Egypt. J. Soil Sci. 43:35–46
2. Abdollatif G, Ardalan M, Tehrani MM, Hosseini HM, Karimian N (2009) Solubility test in some phosphate rocks and their potential for direct application in soil. World Applied Sciences Journal 6(2):182–190
3. Akande MO, Makinde EA, Oluwatoyinbo FI, Adetunji MT (2010) Effects of phosphate rock application on dry matter yield and phosphorus recovery of maize and cowpea grown in sequence. Afr J Environ Sci Technol 4(5):293–303
4. Akande O, Makinde EA, Aluko OA, Oluwatoyinbo FI, Adediran JA (2011) Phosphate rock amendment effects on kenaf (Hibiscus cannabinus L.) growth and yield. Tropical and Subtropical Agroecosystems 14(2):559–565
5. Alguacil MM, Caravaca F, Azcón R, Roldán A (2008) Changes in biological activityof a degraded Mediterranean soil after using microbially-treated dry olive cake as a biosolid amendment and arbuscular mycorrhizal fungi. Eur. J. Soil Bio. 44:347–354