... suitable for various soils and plants, especially for those in the north of China, which can yield a special effect hard to ... fertilizing:The same as that of the SSP, however the application rate of the fertilizer can be scaled down according to the content of the total ... %, 28%, 30%, 32%, 34%, 36%, 38%, etc, based on the content of the total P2O5. Besides above mentioned varieties, users can choose ...