A mixture of solitary superphosphate and triple superphosphate is called double superphosphate. In excess of 90% of a standard superphosphate fertilizer is water-soluble. Cabbage, broccoli and cauliflower are generally sidedressed if the oldest leaves are 2 to 4 inches broad, or at 3 to 4 weeks just after transplanting. More https://water-soluble-fertilizers57890.blog2learn.com/84752829/fertilizer-suppliers-dubai-for-chennai-import-fundamentals-explained