Abstract
Long-term annual applications of fertilizer phosphorus to an acid sandy loam podzol resulted in marked increases in total phosphorus content of the surface soil. However, downward movement was limited as no increase occurred below 9 in. The relationship between total phosphorus content of the profile and sodium bicarbonate-soluble phosphorus (r = 0.93) was significant at the 1% level. Phosphate retention capacity of the surface soil was not influenced by fertilizer or manurial treatment and increases in percentage phosphorus saturation were relatively small.Under conditions of intensive cropping in the greenhouse (12 crops), residual phosphorus was highly effective in supplying crop requirements. However, the results suggest that fertilizer phosphorus may be beneficial during the establishment period. The relationship between phosphorus uptake on the no P series in the greenhouse and levels of sodium bicarbonate-soluble phosphorus (r = 0.88) is further evidence of the value of this method in estimating phosphorus availability in soils.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
