scholarly journals Oxalate and EDTA extractable soil phosphorus and iron in relation to P availability in lowland rice soils of West Africa

1999 ◽  
Vol 32 (2) ◽  
Author(s):  
LT Narteh ◽  
KL Sahrawat
Keyword(s):  
West Africa ◽  
Soil Phosphorus ◽  
Lowland Rice ◽  
P Availability ◽  
Rice Soils ◽  
Extractable Soil

Improved Plant Diversity as a Strategy to Increase Available Soil Phosphorus

2019 ◽  
Vol 103 (1) ◽  
pp. 43-45 ◽  
Author(s):  
Carlos Crusciol ◽  
João Rigon ◽  
Juliano Calonego ◽  
Rogério Soratto
Keyword(s):  
Crop Yields ◽  
Soil Phosphorus ◽  
Cropping System ◽  
P Availability ◽  
P Fractions ◽  
Crop Species ◽  
Soil P ◽  
Residue Decomposition ◽  
Available Soil Phosphorus ◽  
Crop Residue Decomposition

Some crop species could be used inside a cropping system as part of a strategy to increase soil P availability due to their capacity to recycle P and shift the equilibrium between soil P fractions to benefit the main crop. The release of P by crop residue decomposition, and mobilization and uptake of otherwise recalcitrant P are important mechanisms capable of increasing P availability and crop yields.

Increased P diffusion as an explanation of increased p availability in flooded rice soils

1976 ◽  
Vol 45 (2) ◽  
pp. 365-377 ◽  
Author(s):  
F. T. Turner ◽  
J. W. Gilliam
Keyword(s):  
P Availability ◽  
Rice Soils ◽  
Flooded Rice ◽  
P Diffusion

Soil phosphorus (P) mining in agriculture – Impacts on P availability, crop yields and soil organic carbon stocks

2021 ◽  
Vol 322 ◽  
pp. 107660
Author(s):  
Stany Vandermoere ◽  
Tomas Van De Sande ◽  
Greet Tavernier ◽  
Lore Lauwers ◽  
Ellen Goovaerts ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Crop Yields ◽  
Soil Phosphorus ◽  
Carbon Stocks ◽  
P Availability ◽  
Soil Organic Carbon Stocks ◽  
P Mining

scholarly journals Soil phosphorus bioavailability as influenced by long-term management and applied phosphorus source

2019 ◽  
Vol 99 (3) ◽  
pp. 292-304
Author(s):  
Tandra D. Fraser ◽  
Derek H. Lynch ◽  
Ivan P. O’Halloran ◽  
R. Paul Voroney ◽  
Martin H. Entz ◽  
...  
Keyword(s):  
Management Practices ◽  
Soil Phosphorus ◽  
P Uptake ◽  
Italian Ryegrass ◽  
P Availability ◽  
P Fractionation ◽  
Soil P ◽  
Plant P Uptake ◽  
Term Management

Soil phosphorus (P) availability may be impacted by management practices, thereby affecting plant P uptake and plant response to P amendments. The aim of this study was to determine the effects of long-term management on soil P pools and to assess the response of P bioavailability, plant growth, and P uptake to mineral versus manure P treatments. Soils were collected from plots under organic (ORG), organic with composted manure (ORG + M), conventional (CONV), and restored prairie (PRA) management. Italian ryegrass (Lolium multiflorum L.) seedlings were grown in the greenhouse for 106 d in soils amended with various rates of manure or mineral P. The ORG soil had lower concentrations of labile P (resin-P and NaHCO3-P) compared with the CONV and PRA soils, as determined by sequential P fractionation prior to planting. Ryegrass biomass (root + shoot) and shoot P uptake from soils receiving no P were significantly lower for the ORG than all other management systems. Although apparent P use efficiency of the whole plant was increased by low P rate in the ORG management system, the source of applied P, manure > mineral, only influenced Olsen test P.

The residual effectiveness of phosphorus for stylosanthes pastures on red and yellow earths in the semi-arid tropics

Soil Research ◽  
1985 ◽  
Vol 23 (2) ◽  
pp. 211 ◽  
Author(s):  
ME Probert ◽  
J Williams
Keyword(s):  
Soil Phosphorus ◽  
Fertilizer Application ◽  
Yield Data ◽  
Stylosanthes Hamata ◽  
Phosphorus Requirements ◽  
Term Maintenance ◽  
Semi Arid ◽  
Residual Effectiveness ◽  
Extractable Soil

A mathematical description is presented of the effects through time of phosphorus fertilizer application on the growth of Stylosanthes hamata cv. Verano and on changes in extractable soil phosphorus on a red and a yellow earth in the semi-arid tropics. For the five years of observations, the models used provided reasonable descriptions of both aspects. It was not possible, however, to clearly demonstrate which of two functions tested better described the decreasing effectiveness of phosphorus with time. The simpler exponential function provided as good a fit to the yield data as did the function proposed by Barrow, whilst for the extractable phosphorus data the latter did explain a significantly higher proportion of the variance, but its coefficients could not be estimated with great precision. The results show that the phosphorus requirements of such pastures on these soils are modest. Extractable soil phosporus levels of approximately 12 �g g-1 in either 0.005 M H2SO4 or 0.5 M NaHCO3 are indicated as being adequate to ensure near-maximum yields of the legume. Long-term maintenance fertilizer needs as predicted by the models are discussed.

scholarly journals Drivers of aboveground wood production in a lowland tropical forest of West Africa: teasing apart the roles of tree density, tree diversity, soil phosphorus, and historical logging

2016 ◽  
Vol 6 (12) ◽  
pp. 4004-4017 ◽  
Author(s):  
Tommaso Jucker ◽  
Aida Cuni Sanchez ◽  
Jeremy A. Lindsell ◽  
Harriet D. Allen ◽  
Gabriel S. Amable ◽  
...  
Keyword(s):  
West Africa ◽  
Tropical Forest ◽  
Soil Phosphorus ◽  
Tree Diversity ◽  
Tree Density ◽  
Wood Production ◽  
Lowland Tropical Forest

Interpretation of a single-point P buffering index for adjusting critical levels of the Colwell soil P test

Soil Research ◽  
2007 ◽  
Vol 45 (1) ◽  
pp. 55 ◽  
Author(s):  
P. W. Moody
Keyword(s):  
Buffer Capacity ◽  
Soil Phosphorus ◽  
Single Point ◽  
Maximum Yield ◽  
P Value ◽  
P Availability ◽  
Soil P ◽  
P Concentration ◽  
Soil P Test ◽  
Rate Of Increase

Soil phosphorus (P) buffer capacity is the change in the quantity of sorbed P required per unit change in solution P concentration. Because P availability to crops is mainly determined by solution P concentration, as P buffer capacity increases, so does the quantity of P required to maintain a solution P concentration that is adequate for crop demand. Bicarbonate-extractable P using the Colwell method is the most common soil P test used in Australia, and Colwell-P can be considered to estimate P quantity. Therefore, as P buffer capacity increases, the Colwell-P concentration required for maximum yield also increases. Data from several published and unpublished studies are used to derive relationships between the ‘critical’ Colwell-P value (Colwell-P at 90% maximum yield) and the single-point P buffer index (PBI) for annual medics, soybean, potato, wheat, and temperate pasture. The rate of increase in critical Colwell-P with increasing PBI increases in the order: temperate pasture < medics < wheat < potato. Indicative critical Colwell-P values are given for the 5 crops at each of the PBI categories used to describe soil P buffer capacity as it increases from extremely low to very high.

Phosphorus Supplying Capacity of Lowland Rice Soils

1966 ◽  
Vol 30 (5) ◽  
pp. 613-617 ◽  
Author(s):  
S. K. DeDatta ◽  
J. C. Moomaw ◽  
V. V. Racho ◽  
G. V. Simsiman
Keyword(s):  
Lowland Rice ◽  
Rice Soils
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