scholarly journals Implications of choosing different interpolation methods: A case study for soil test phosphorus

cftm ◽  
2021 ◽  
Author(s):  
Emma G. Matcham ◽  
Sakthi Kumaran Subburayalu ◽  
Steven Culman ◽  
Laura Lindsey
Keyword(s):  
Soil Test ◽  
Interpolation Methods ◽  
Soil Test Phosphorus

Agronomic and environmental soil test phosphorus in manured and non-manured Manitoba soils

2007 ◽  
Vol 87 (1) ◽  
pp. 73-83 ◽  
Author(s):  
D. Kimaragamage ◽  
O O Akinremi ◽  
D. Flaten ◽  
J. Heard
Keyword(s):  
Iron Oxide ◽  
Surface Soil ◽  
Single Equation ◽  
Soil Samples ◽  
Soil Test ◽  
Regression Equations ◽  
Soil P ◽  
Soil Test Phosphorus ◽  
Bray 1 ◽  
Water Extractable

Quantitative relationships between soil test phosphorus (STP) methods are needed to guide P management especially in manured soils with high P. Our objectives were: (i) to compare amounts of P extracted by different methods; (ii) to develop and verify regression equations to convert results among methods; and (iii) to establish environmental P thresholds for different methods, in manured and non-manured soils of Manitoba. We analyzed 214 surface soil samples (0–15 cm), of which 51 had previous manure application. Agronomic STP methods were Olsen (O-P), Mehlich-3 (M3-P), Kelowna-1 (original; K1-P), Kelowna-2 (modified; K2-P), Kelowna-3 (modified; K3-P), Bray-1 (B1-P) and Miller and Axley (MA-P), while environmental STP methods were water extractable (W-P), Ca Cl2 extractable (Ca-P) and iron oxide impregnated filter paper (FeO-P) methods. The different methods extracted different amounts of P, but were linearly correlated. For an O-P range of 0–30 mg kg-1, relationships between O-P and other STP were similar for manured and nonmanured soils, but the relationships diverged at higher O-P levels, indicating that one STP cannot be reliably converted to another using a single equation for manured and non-manured soils at environmentally critical P levels (0–100 mg kg-1 O-P). Suggested environmental soil P threshold ranges, in mg P kg-1, were 88–118 for O-P, 138–184 for K1-P, 108–143 for K2-P, 103–137 for K3-P, 96–128 for B1-P, 84–111 for MA-P, 15–20 for W-P, 5–8 for Ca-P and 85–111 for FeO-P. Key words: Phosphorus, soil test phosphorus, manured soils, non-manured soils, environmental threshold

Soil test phosphorus as affected by phosphorus budgets in two long-term field experiments in Germany

2018 ◽  
Vol 218 ◽  
pp. 158-170 ◽  
Author(s):  
Theresa Zicker ◽  
Sabine von Tucher ◽  
Mareike Kavka ◽  
Bettina Eichler-Löbermann
Keyword(s):  
Field Experiments ◽  
Soil Test ◽  
Phosphorus Budgets ◽  
Soil Test Phosphorus ◽  
Term Field

Soil Test Phosphorus and Phosphorus Availability of Swine Manures with Long-Term Application

2018 ◽  
Vol 110 (5) ◽  
pp. 1943-1950
Author(s):  
Xianjun J. Hao ◽  
T.Q. Zhang ◽  
Y.T. Wang ◽  
C.S. Tan ◽  
Z.M. Qi ◽  
...  
Keyword(s):  
Phosphorus Availability ◽  
Soil Test ◽  
Soil Test Phosphorus

scholarly journals Finnish trends in phosphorus balances and soil test phosphorus

2008 ◽  
Vol 16 (4) ◽  
pp. 301 ◽  
Author(s):  
R. UUSITALO ◽  
E. TURTOLA ◽  
J. GRÖNROOS
Keyword(s):  
Agricultural Soils ◽  
Animal Production ◽  
Plant Production ◽  
Major Influence ◽  
Soil Test ◽  
P Loss ◽  
P Concentration ◽  
Soil Test P ◽  
Soil Test Phosphorus ◽  
Yield Responses

Soil test phosphorus (P) concentration has a major influence on the dissolved P concentration in runoff from agricultural soils. Thus, trends in soil test P partly determine the development of pollution potential of agricultural activities. We reviewed the changes of soil test P and P balances in Finnish agriculture, and assessed the current setting of P loss potential after two Agri-Environmental Programs. Phosphorus balance of the Finnish agriculture has decreased from +35 kg ha–1 of the 1980’s to about +8 kg P ha–1 today. As a consequence, the 50-yr upward trend in soil test P concentrations has probably levelled out in the late 1990’s, as suggested by sampling of about 1600 fields and by a modelling exercise. For the majority of our agricultural soils, soil test P concentrations are currently at a level at which annual P fertilization is unlikely to give measurable yield responses. Soils that benefit from annual P applications are more often found in farms specialized in cereal production, whereas farms specialized in non-cereal plant production and animal production have higher soil test P concentrations. An imbalance in P cycling between plant (feed) and animal production is obvious, and regional imbalances are a result of concentration of animal farms in some parts of the country. A major concern in future will be the fate of manure P in those regions where animal production intensity is further increasing.;

Phosphorus Source Effects on Soil Test Phosphorus and Forms of Phosphorus in Soil

2003 ◽  
Vol 34 (13-14) ◽  
pp. 1897-1917 ◽  
Author(s):  
Angela M. Ebeling ◽  
Leslie R. Cooperband ◽  
Larry G. Bundy
Keyword(s):  
Soil Test ◽  
Source Effects ◽  
Phosphorus Source ◽  
Soil Test Phosphorus

scholarly journals Soil test phosphorus and phosphorus balance trends: A county‐level analysis in Ohio

2020 ◽  
Vol 112 (3) ◽  
pp. 1617-1624 ◽  
Author(s):  
Elizabeth A. Dayton ◽  
Raj K. Shrestha ◽  
Anthony M. Fulford ◽  
Kim R. Love ◽  
Steven W. Culman ◽  
...  
Keyword(s):  
Soil Test ◽  
County Level ◽  
Phosphorus Balance ◽  
Soil Test Phosphorus ◽  
Level Analysis
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