Changes of the mobile forms of phosphorus in sands under influence of fertilizers

Form of connection, area, degree mobility and availability has importance. For cotton plant but not the absolute size the content of phosphorus. The losses of phosphorus are especially significant at erosion fine - dispersion able mineral and organic-mineral particles and organic substance, which structure contains basic weight of connections of the given element. The experiences were spent carried from 1999 to 2003 yy. In three times repetition according to field techniques and vegetal experiences, which are published in a public and press. The results of the analysis of mechanical structure and sand of Central Fergana where were carried experience up to a beginning of a field experience are given in the table 1, from which it is visible, that the sand are poor by nutritious elements.