The most efficient method of applying some fertilisers is through the irrigation, and has been used successfully by many growers because it saves labour, fuel costs, and reduces compaction due to less traffic. Soluble fertilisers can be leached down the soil profile to a depth of 20 cm where the most active root growth generally occurs. Fertilisers such as superphosphate, gypsum, lime, slaked lime, and dolomite have too low a solubility for application through irrigation your irrigation system. Potassium sulfate is only marginally suitable and should be avoided in favour of potassium chloride. Use friendly fertilisers, the ones with the lower salt index.
All nitrogen fertiliser is converted to nitrate which has a high salt index.
The salt index is defined as the ability of the same weight of each fertiliser to increase the salinity of the soil, relative to sodium nitrate being given an index of 100. In summary, by adopting irrigation scheduling and fertigation techniques you will be working in harmony with nature in a sustainable manner, generating a consistent quality product, and optimising profit. Due to the constraints of the presentation medium, I am unable to satisfactorily render them. If you require clarification in relation to these tables, please contact the author.