Results 281 to 290 of about 511,075 (355)
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Science of the Total Environment, 2022
Currently, the shortage of phosphorus resources is becoming more and more serious. In general, phosphorus fertilizer is poorly utilized in soil and tends to gradually accumulate.
Long Sui +3 more
semanticscholar +1 more source
Currently, the shortage of phosphorus resources is becoming more and more serious. In general, phosphorus fertilizer is poorly utilized in soil and tends to gradually accumulate.
Long Sui +3 more
semanticscholar +1 more source
Autoclaving Soil Samples Affects Algal‐Available Phosphorus
Journal of Environmental Quality, 2005ABSTRACTUnwanted microbial interference in samples used for biological assays of P availability has routinely been eliminated by autoclaving samples before inoculation with algae. Twenty‐three soils were selected to evaluate the relationship between algal growth in P‐deficient solutions containing small quantities of soil and the level of P determined ...
Brandon H, Anderson +1 more
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Availability of residual phosphorus in high phosphorus soils
Communications in Soil Science and Plant Analysis, 2002Although we know soil phosphorus (P) can rapidly increase when fertilizer or manure is continually applied at rates exceeding crop removal, there is little information on the rate of P release from high P soils as a function of soil type. Surface samples (0–5 cm) were collected from five major soil types in Pennsylvania (Chester silt loam, Conotton ...
Richard McDowell, Andrew Sharpley
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Availability of Phosphorus in Nilgiri Soils
Madras Agricultural Journal, 1967Availability of phosphorus in soils is one of the factors affecting crop production. In acid soils, though total phosphorus is high, its availability is very low due to adverse environmental and resulting pedogenic factors. An attempt was made therefore, to assess the phosphorus availability in soils of Nilgiris, and to study the effect of rainfall ...
MATHAN M.M, JOHN DURAIRAJ D
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Soil phosphorus availability to millet roots
Communications in Soil Science and Plant Analysis, 1978Abstract Soil solution P level is believed to be important in determining P uptake rates from soil. The objective of this research was to investigate the relation between initial P concentration in the soil solution and P flux into the root. Millet (Panicum milaceum) was grown on five soils each of which was adjusted to six Cli levels by addition of P.
J. A. Adepetu, S. A. Barber
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Digital Mapping of Soil Available Phosphorus Supported by AI Technology for Precision Agriculture
International Conference on Agro-Geoinformatics, 2018Precision agriculture has been proposed to improve the sustainability of agriculture and solve the environmental pollution of soil. In precision agriculture process, the management of water and fertilizer is carried out on agricultural operation units ...
Wen Dong +3 more
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Evaluation of available phosphorus in highly phosphorus-deficient soils
Plant and Soil, 1964In a greenhouse experiment single superphosphate was supplied in varying rates to lettuce test plants grown in soils of very low phosphorus availability.
U. Kafkafi +6 more
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Phosphorus Source and Soil Properties Effects on Phosphorus Availability
Soil Science, 2011Phosphorus (P) application in excess of crop needs has increased the concentration of P in soils and has been linked to freshwater eutrophication leading to P-based nutrient management. However, insufficient data are available relating soils properties, P-source solubility, and rate and time of application to develop sound guidelines. We investigated P
Francirose Shigaki, Andrew Sharpley
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Determining Available Soil Phosphorus in Nova Scotia Blueberry Soils
Communications in Soil Science and Plant Analysis, 2004Abstract A project was initiated to determine the best predictor of plant-available phosphorus (P) for the Nova Scotia lowbush blueberry (Vaccinium angustifolium Ait.) from the following extractants: Mehlich 1, Mehlich 3, Bray 1, modified Morgan, and the anion exchange membrane.
R. A. Ring +3 more
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Estimating Available Soil Phosphorus Increases after Phosphorus Additions in Mollisols
Soil Science Society of America Journal, 2008Accurate critical levels must be accompanied by predictive models on the amount of P required to increase P availability to a target value to obtain reliable P recommendations. We estimated, based on information on soil properties, the increase in soil available P after the addition of a unit of P ( b
Gerardo Rubio +3 more
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