Uygur, VeliKarabatak, Ibrahim2024-09-182024-09-1820091436-87301522-2624https://doi.org/10.1002/jpln.200700326https://hdl.handle.net/20.500.12483/10751Organic amendments considerably affect nutrient balance and interfraction mobility of nutrients by influencing the chemical, physical, and biological environment in soils. In this study, the effects of five amendments including: two composts, farmyard manure, packaging-industry by-product, and olive-mill waste on time-dependent interfraction mobility of P among mineral P fractions in two semiarid-region soils differing in carbonate content and texture were investigated. Organic materials were applied at the rate of 0, 25, 50, and 100 g (kg soil)(-1) soil thoroughly mixed and incubated at 27 degrees C +/- 2 degrees C for 110 d. Phosphorus fractions were sequentially extracted by 0.1 M NaOH + 1 M NaCl (NaOH-P), citrate-bicarbonate-dithionite (CBD-P), and 0.5 M HCl (Ca-P). Results showed that organic amendments especially farmyard manure significantly influenced NaOH-P, CBD-P, and Ca-P. In addition, higher application rates of organic residues increased NaOH-P fraction. NaOH-P and CBD-P fractions were increased after addition of organic residues and then converted to Ca-P fraction within the end of incubation period. Increasing application rate of organic residues allowed P to be retained in more labile fractions for a longer period. The amount of Ca-P was found to be related with carbonate content of soils. It can be concluded that organic residues applied to calcareous soils may enhance P nutrition of agricultural plants.eninfo:eu-repo/semantics/openAccessinorganic phosphor fractionscompostfarmyard manureolive cakeArticle172333634510.1002/jpln.2007003262-s2.0-67650151001Q2WOS:000267457200003N/A