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The National Agricultural Library is one of four national libraries of the United States, with locations in Beltsville, Maryland and Washington, D.C. It houses one of the world's largest and most accessible agricultural information collections and serves as the nexus for a national network of state land-grant and U.S. Department of Agriculture field libraries. In fiscal year 2011 (Oct 2010 through Sept 2011) NAL delivered more than 100 million direct customer service transactions.

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Journal Article

Journal Article

Influence of Manure Phytic Acid on Phosphorus Solubility in Calcareous Soils  [2006]

Leytem, A.B.; Smith, D.R.; Applegate, T.J.; Thacker, P.A.;

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Manure characteristics can influence the potential for P transfer in runoff following land application of manures. This research assessed the influence of manure characteristics on P solubility in calcareous soils using manures from poultry (Gallus Domisticus) fed a variety of grain-based diets with the manures containing a range of total P (5.6-16.4 g P kg⁻¹), water-extractable P (WEP, 0.9-4.7 g P kg⁻¹), phytic acid P (0.1-7.6), total N/P ratios (2.6-5.1), and total C/P ratios (19.5-75.7). In addition, mono-ammonium phosphate fertilizer and reagent grade inositol hexaphosphate (phytic acid [PA]), were included, as well as a control treatment with no P additions. Treatments were incorporated into two soils (Portneuf [Coarse-silty, mixed, superactive, mesic Durinodic Xeric Haplocalcids] and Millville [Coarse-silty, carbonatic, mesic Typic Haploxerolls]) at three rates (10, 20, and 40 mg P kg⁻¹) and incubated for a total of 18 wk with subsamples taken at 2, 5, 9, and 18 wk. Soil samples were analyzed for inorganic and organic NaHCO₃ (Olsen) extractable P and select soils were analyzed at 0 and 12 wk by ³¹P nuclear magnetic resonance spectroscopy (NMR) for soil P characterization. The percentage of WEP and PA (of total P) in the manures were linearly related (r² = 0.94). Increases in Olsen P over time were positively related to the percentage of monoester P in the treatments. At 2 wk, there was a strong negative correlation between the amount of PA added in t
he treatments and increases in Olsen P. However, by 18 wk, Olsen P was more closely related to the amount of C or N added with the treatments. Changes in PA content of manures due to dietary modification may influence P sorption on calcareous soils in the short-term while other characteristics such as C/P ratio may exert a stronger influence over changes in soil test P over longer time periods.
From the journal
Soil Science Society of America journal
ISSN : 0361-5995

Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
70
Issue:
5
Start Page:
1629
End Page:
1638
All titles:
"Influence of Manure Phytic Acid on Phosphorus Solubility in Calcareous Soils"@eng
Other:
"Includes references"
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Bibliographic information

Language:
English
Type:
Journal Article
In AGRIS since:
2013
Volume:
70
Issue:
5
Start Page:
1629
End Page:
1638
All titles:
"Influence of Manure Phytic Acid on Phosphorus Solubility in Calcareous Soils"@eng
Other:
"Includes references"