摘要：An experiment was designed to check the response of Roselle to organic and inorganic phosphorus at the horticulture farm, University of Agriculture Peshawar-Pakistan, during the year 2012. The chemical fertilizer, Single Super Phosphate (SSP) was used as an inorganic source of phosphorus, while Bio-Organo-Phosphate (BOP) containing 20% of phosphorus penta-oxide (P2O5) was used as a source of organic phosphorus. Both sources of the fertilizer were applied at the rate of 10, 20, 30 40 and 50 kg ha-1 and was tested and their effect was compared with that of control. The results revealed that both the sources and levels of phosphorus significantly affected the growth parameters of Roselle, i.e. plant height, numbers of leaves, number of branches, leaf area, days to flowering, fresh weight of the flower, calyx, dry weight of calyx, number of calyces, number of roots, root length and root weight.
