OCR Text |
Show \ Orlclr Origin of f bollThe SoilThe Soil boll SoilThe The oriein origin of a soil 11 Iii is the most mostImportant mostimportant mostImportant Important cause of ot either a natural naturaldeficiency naturaldeficiency naturaldeficiency deficiency of ot phosphorus or of ot a aplentiful aplentiful aplentiful plentiful supply Thus a loll soil derivedt derivedr derivedI derivedtrom derivedfrom derived t r I from trom materiali materials low in phosphorus phosphoruswill phosphoruswill phosphoruswill will also be low In this element elementThere elementThere elementThere , There are soils that have a high hightotal hightotal total phosphorus content but becauseof becauseot because ot of a high lime lim content the phospho- phospho phosphoc phosphoe phosphorus phosphorus phosphosus - - c e < rus sus is u unavailable or Insoluble Theability The TheI Theability Th Thability ability of ot the soil to release its phos phosphorull phosphorus phoaphorus phorull phorus li Is a measure of ot Its fertilityand fertility fertilityand fertilityand I and not the total amount In a soil soU |