In general can be concluded that alone or combine utilization of ammonium sulfate as soil-application and iron sulfate as foliar spray have important role on enhancement of quantitative and qualitative traits of sweet lime crop. However, the effect of different levels of each the above factors on fruit characteristics are different. What is certain, application of above materials is able to reduce the fruit abscission rate and cause a large increase in the yield. It is important that growers achieve to high yields but fruit quality characteristics should also be noted. On the principle, application of 250 g ammonium sulfate per tree in soil and foliar spraying 10 mg/L iron sulfate, in addition to increased yield, better quality fruit will have and there is a saving than chelates application.