Organic phosphorus in Madagascan rice soils

Labile and Non-Labile Fractions of Phosphorus and Its Transformations in Soil under Eucalyptus Plantations, Brazil

“…This proportion of Po is within the range found in tropical regions for several soil orders (from low to medium content of organic C) and land-use systems, with average values of total Po from 26% [9,35,36] to 31% [11,19,37]. Oliveira et al [38] found proportions of total Po ranging from 36% to 46% for soils with high contents of organic matter, a conclusion that supports these findings.…”

Identification of inositol hexakisphosphate binding sites in soils by selective extraction and solution 31P NMR spectroscopy

“…Even less is known about the stabilization of organic bound IP 6 , but the fate of this IP 6 pool is probably controlled by the same factors that control organic matter dynamics. This may also explain why scyllo-IP 6 concentrations in Madagascan rice soils correlate positively with total carbon, total nitrogen and organic P (Turner, 2006).…”

“…Soil was collected from three ecosystems: tropical rice paddies in Madagascar (Turner, 2006), temperate grasslands in the Falkland Islands , and temperate rainforest at the Haast chronosequence in New Zealand (Turner et al, 2014). The following labels were used: for the rice paddies (MDG), temperate grassland soils (EAST) and temperate rainforest soils (Dune).…”

“…The soils had a range of properties, including total P concentrations (Table 1), and were known from previous studies to contain IP 6 . Detailed information on the soils is available elsewhere (Turner, 2006;Turner et al, 2012Turner et al, , 2014, although it should be noted that the temperate grassland soils were from slightly different locations from those studied previously . All samples were surface soils (0-10 cm) and were air dried, screened and sieved (b2 mm) prior to analysis, with storage in sealed plastic bags at ambient laboratory temperature and humidity (22°C and 55%, respectively).…”

Solution Phosphorus-31 Nuclear Magnetic Resonance Spectroscopy of Soils from 2005 to 2013: A Review of Sample Preparation and Experimental Parameters

“…The majority of studies used air-dried soils (e.g., Lehmann et al, 2005;Smith et al, 2006;Cade-Menun et al, 2010;Soinne et al, 2011;Turner and Blackwell, 2013). A few studies used soils that were oven dried at various temperatures (e.g., Turner 2006;Bol et al, 2006), while others extracted fieldmoist soils (Briceño et al, 2006;Turner, 2008;Hill and CadeMenun, 2009;Doolette et al, 2010Doolette et al, , 2011bRedel et al, 2011). Wetland soils were extracted field moist (Sundareshwar et al, 2009) or after oven drying at various temperatures (El-Rifai et al, 2008;Cheesman et al, 2010b;Hamdan et al, 2012), air drying , or after freezing and freeze-drying (Turner et al, 2006a).…”