Soil phosphorus storage capacity in manure-impacted Alaquods: Implications for water table management

2011 ◽  
Vol 142 (3-4) ◽  
pp. 167-175 ◽  
Author(s):  
D. Chakraborty ◽  
V.D. Nair ◽  
M. Chrysostome ◽  
W.G. Harris
Keyword(s):  
Water Table ◽  
Storage Capacity ◽  
Soil Phosphorus ◽  
Water Table Management ◽  
Phosphorus Storage

Laboratory Validation of Soil Phosphorus Storage Capacity Predictions for Use in Risk Assessment

2007 ◽  
Vol 71 (5) ◽  
pp. 1564-1569 ◽  
Author(s):  
M. Chrysostome ◽  
V. D. Nair ◽  
W. G. Harris ◽  
R. D. Rhue
Keyword(s):  
Risk Assessment ◽  
Storage Capacity ◽  
Soil Phosphorus ◽  
Phosphorus Storage

Soil phosphorus storage capacity as affected by repeated phosphorus addition in an Ultisol

2020 ◽  
Vol 51 (14) ◽  
pp. 1960-1968
Author(s):  
Xinghong Xu ◽  
Yanling Wang ◽  
Hailin Zhang ◽  
Dan Yin ◽  
Biswanath Dari ◽  
...  
Keyword(s):  
Storage Capacity ◽  
Soil Phosphorus ◽  
Phosphorus Addition ◽  
Phosphorus Storage

scholarly journals Seal Tightly and Store in a Cool Dry Place: Exploring Soil Phosphorus Storage in a Subtropical Treatment Wetland.

2021 ◽  
Author(s):  
Paul Julian II ◽  
Todd Z. Osborne ◽  
Vimala D. Nair
Keyword(s):  
Storage Capacity ◽  
Soil Depth ◽  
Soil Phosphorus ◽  
Stormwater Treatment ◽  
Treatment Wetland ◽  
Wetland Ecosystems ◽  
Soil P ◽  
Iron Aluminum ◽  
Variable Condition ◽  
Phosphorus Storage

Abstract Oligotrophic wetlands of the Everglades are often the final recipients of nutrients from adjacent ecosystems and tend to accumulate phosphorus (P) in their soils. Understanding P source and sink dynamics in wetlands are critical for managing wetland ecosystems and protecting downstream resources. In this study, soil P storage capacity (SPSC) was evaluated within two treatment flow-ways of the Everglades Stormwater Treatment Areas (STAs). This study hypothesized that SPSC will vary between flow-ways, soil depth, and spatially along the inflow-to-outflow gradient. The P storage capacity in the STAs depend on the proportion of iron, aluminum, calcium, and magnesium (Fe, Al, Ca, and Mg, respectively) to P with floc and recently accreted soils (RAS) being associated more with Ca and Mg and pre-STA soils being associated more with Fe and Al. Phosphorus loss, as indicated from SPSC values would vary between systems and soil depths suggesting a variable condition of P sink and source within and along flow-ways. This result, while limited, demonstrates the applicability of SPSC to wetlands systems and provides information that will aid operational or management decisions associated with improving P retention of the Everglades STAs.

scholarly journals Soil Phosphorus Storage Capacity for Environmental Risk Assessment

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Vimala D. Nair ◽  
Willie G. Harris
Keyword(s):  
Risk Assessment ◽  
Storage Capacity ◽  
Soil Phosphorus ◽  
Cost Effective ◽  
Threshold Value ◽  
Molar Ratio ◽  
Soil P ◽  
Risk Assessment And Management ◽  
Previous Loading ◽  
Phosphorus Storage

Reliable techniques must be developed to predict phosphorus (P) storage and release from soils of uplands, ditches, streams, and wetlands in order to better understand the natural, anthropogenic, and legacy sources of P and their impact on water quality at a field/plot as well as larger scales. A concept called the “safe” soil phosphorus storage capacity (SPSC) that is based on a threshold phosphorus saturation ratio (PSR) has been developed; the PSR is the molar ratio of P to Fe and Al, and SPSC is a PSR-based calculation of the remaining soil P storage capacity that captures risks arising from previous loading as well as inherently low P sorption capacity of a soil. Zero SPSC amounts to a threshold value below which P runoff or leaching risk increases precipitously. In addition to the use of the PSR/SPSC concept for P risk assessment and management, and its ability to predict isotherm parameters such as the Langmuir strength of bonding,KL, and the equilibrium P concentration, EPC0, this simple, cost-effective, and quantitative approach has the potential to be used as an agronomic tool for more precise application of P for plant uptake.

LINKFLOW, A WATER FLOW COMPUTER MODEL FOR WATER TABLE MANAGEMENT: PART 3. MODEL APPLICATION

1997 ◽  
Vol 40 (6) ◽  
pp. 1543-1547 ◽  
Author(s):  
P. L. Havard ◽  
S. O. Prasher ◽  
R. B. Bonnell ◽  
A. Madani
Keyword(s):  
Water Flow ◽  
Water Table ◽  
Computer Model ◽  
Model Application ◽  
Water Table Management

scholarly journals Water Table Management Reduces Tile Nitrate Loss in Continuous Corn and in a Soybean-Corn Rotation

2001 ◽  
Vol 1 ◽  
pp. 163-169 ◽  
Author(s):  
Craig F. Drury ◽  
Chin S. Tan ◽  
John D. Gaynor ◽  
John W. Daniel Reynolds ◽  
Thomas W. Welacky ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Table ◽  
Nitrate Concentration ◽  
Tile Drainage ◽  
N Fertilizer ◽  
Phase 2 ◽  
Nitrate Loss ◽  
Continuous Corn ◽  
Water Table Management ◽  
Drinking Water Guideline

Water table management systems can be designed to alleviate soil water excesses and deficits, as well as reduce nitrate leaching losses in tile discharge. With this in mind, a standard tile drainage (DR) system was compared over 8 years (1991 to 1999) to a controlled tile drainage/subirrigation (CDS) system on a low-slope (0.05 to 0.1%) Brookston clay loam soil (Typic Argiaquoll) in southwestern Ontario, Canada. In the CDS system, tile discharge was controlled to prevent excessive drainage, and water was pumped back up the tile lines (subirrigation) to replenish the crop root zone during water deficit periods. In the first phase of the study (1991 to 1994), continuous corn (Zea mays, L.) was grown with annual nitrogen (N) fertilizer inputs as per local soil test recommendations. In the second phase (1995 to 1999), a soybean (Glycine max L., Merr.)-corn rotation was used with N fertilizer added only during the two corn years. In Phase 1 when continuous corn was grown, CDS reduced total tile discharge by 26% and total nitrate loss in tile discharge by 55%, compared to DR. In addition, the 4-year flow weighted mean (FWM) nitrate concentration in tile discharge exceeded the Canadian drinking water guideline (10 mg N l–1) under DR (11.4 mg N l–1), but not under CDS (7.0 mg N l–1). In Phase 2 during the soybean-corn rotation, CDS reduced total tile discharge by 38% and total nitrate loss in tile discharge by 66%, relative to DR. The 4-year FWM nitrate concentration during Phase 2 in tile discharge was below the drinking water guideline for both DR (7.3 mg N l–1) and CDS (4.0 mg N l–1). During both phases of the experiment, the CDS treatment caused only minor increases in nitrate loss in surface runoff relative to DR. Hence CDS decreased FWM nitrate concentrations, total drainage water loss, and total nitrate loss in tile discharge relative to DR. In addition, soybean-corn rotation reduced FWM nitrate concentrations and total nitrate loss in tile discharge relative to continuous corn. CDS and crop rotations with reduced N fertilizer inputs can thus improve the quality of tile discharge water substantially.

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