نتایج جستجو برای: total phosphorus

تعداد نتایج: 834146  

2006
Francis Zvomuya Bobbi L. Helgason Francis J. Larney H. Henry Janzen Olalekan O. Akinremi Barry M. Olson

Prediction of phosphorus (P) availability from soil-applied composts and manure is important for agronomic and environmental reasons. This study utilized chemical properties of eight composted and two non-composted beef cattle (Bos taurus) manures to predict cumulative phosphorus uptake (CPU) during a 363-d controlled environment chamber bioassay. Ten growth cycles of canola (Brassica napus L.)...

2007
Dan Lindgren

HÅKANSON, L. and LINDGREN, D., 2008. On regime shifts and budgets for nutrients in the open Baltic Proper: evaluations based on extensive data between 1974 and 2005. Journal of Coastal Research, 24(0), 000–000. West Palm Beach (Florida), ISSN 0749-0208. Empirical data ultimately form the basis for most environmental studies. This work uses extensive data sets from the Baltic Proper on total pho...

Journal: :Latin American Journal of Aquatic Research 2016

Journal: :Water research 2004
Meifang Zhou David M Struve

There are differences between the EPA Method 365 and the APHA-AWWA-WEF's Standard Method 4500 with respect to the post-digestion treatment procedures of the persulfate-digested water. The effects on total phosphorus analysis of different post-digestion treatment procedures, such as neutralization and reacidification, and shaking/settling, were investigated in this study using the total phosphor...

Journal: :Chemosphere 2011
Marion Dumas Emmanuel Frossard Roland W Scholz

Harvests of crops, their trade and consumption, soil erosion, fertilization and recycling of organic waste generate fluxes of phosphorus in and out of the soil that continuously change the worldwide spatial distribution of total phosphorus in arable soils. Furthermore, due to variability in the properties of the virgin soils and the different histories of agricultural practices, on a planetary ...

Journal: :مرتع و آبخیزداری 0
مسعود مؤمنی محمود کلباسی2 احمد جلالیان حسین خادمی

the discharge of total suspended sediments (tss) and dissolved nutrients from watersheds into receiving waters is a serious problem when natural vegetation is degraded by agriculture or overgrazing. this study was conducted in soolegan watershed to investigate land use change and overgrazing effects on phosphorus loss (dissolved & particulate), particle size associated loss of p and effect of t...

2006
Shirish Bhat Jennifer M. Jacobs Kirk Hatfield Joseph Prenger

Within a military land activity context, relationships between stream water chemistry and watershed land use, topography and vegetation were explored at the Fort Benning Military Installation, Georgia. Water quality parameters, including pH, temperature, conductivity, total Kjeldahl nitrogen, total phosphorus, total organic carbon, chloride, and total suspended solids, were routinely measured i...

2017
Scott T. McClure Alex R. Chang Elizabeth Selvin Casey M. Rebholz Lawrence J. Appel

Interest in the health effects of dietary phosphorus is burgeoning, yet sources and trends in phosphorus consumption have not been well characterized. We describe trends in and primary sources of dietary phosphorus in a nationally representative sample of 34,741 US adults, 20+ years old (NHANES 2001-2014). Dietary sources of phosphorus were estimated in nine food groups and 26 food categories. ...

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