This study was carried out during ( 2003- 2004 ) on pear trees ( pyrus communis L. cv . Le-conte ). Orchard in kirkuk city . the aim of this study was to find out the effect of phosphorus on growth and yield characteristics . Forty eight Trees 8 years old planted at spacing of 4*6 meter . were chosen and they were Treated with four levels of super phosphate ( 0 ، 250 ، 500 ، 750 ) g / tree .The randomized complete block design was used . Analysis of variance and Duncuns multiple rangetest was adopted at 5 % level of probability and the important results of this study could be summarized as follow :

1- Results obtained indicated that ( N ، P ، K ) were increased significantly by
( 750 g / tree ) super phosphate compared with control treatments .

2- The results showed that there was significant increasing in vegetative
growth of trees which trialed with ( 750 g / tree ) super phosphate compared with control treatments .

3- The quantitative characteristics of yield significantly increased with
( 750 g / tree ) super phosphate which had abetter results compared
with control treatments .

4- The qualitative characteristics of yield significantly increased with (750g / tree) super phosphate which had abetter results compared
with control treatments .