THE FATE OF solUBLE PHOSPHATE APPLIED TO SOILS

Chang, Sin-Chung; Chu, Wenxiang

doi:10.1111/j.1365-2389.1961.tb00918.x

Cited by 48 publications

(23 citation statements)

References 5 publications

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“…The greatest Fe-P content was consistent with the previous study by Chang and Chu (1961). This study has reported that Al-P content is greater than Fe-P at the fertilization and then tends to decrease while Fe-P content increases with time.…”

Section: Soil Chemical Propertiessupporting

confidence: 91%

Nitrogen and Phosphorus Content Changes in Paddy Soil and Water As Affected by Organic Fertilizer Application

Lee¹,

Lee²,

Gil³

et al. 2011

Korean Journal of Environmental Agriculture

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BACKGROUND:With increasing public awareness to environment-friendly agriculture, many efforts have been run to develop organic farming technologies in Korea as of late 90s. The objective of this study was to investigate the effects of different organic farming practices on soil chemical properties and water quality in paddy fields. METHODS AND RESULTS:Total nitrogen (TN) and total phosphorus (TP) were monitored for a two-year period (2006 to 2007) from the study organic paddy fields located in Wan-ju, Jeonbuk Province in Korea. TN and TP of organic paddy water were gradually increased for 2~3 weeks after organic manure application and then gradually decreased afterward. The overall variation of TP in the paddy fields was much greater than that of TN. The phosphorus content in organic paddy field appeared to increase with the organic farming period. CONCLUSION(s):This indicates that long-term organic farming is likely to cause phosphorus accumulation in soils and increase vulnerability to rainfall runoff. Thus, appropriate phosphorus management needs to be implemented, particularly, to reduce excessive phosphorus supply owing to nitrogen-based determination of organic manure application amount.

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Section: Soil Chemical Propertiessupporting

confidence: 91%

Nitrogen and Phosphorus Content Changes in Paddy Soil and Water As Affected by Organic Fertilizer Application

Lee¹,

Lee²,

Gil³

et al. 2011

Korean Journal of Environmental Agriculture

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“…of Chang and Chu (1961), who found that soluble phosphate changed rapidly to AI-P, with a slower change to Fe-P and very little formation of Ca-P.…”

Section: Phosphorus Fractionsmentioning

confidence: 99%

Changes in forms of soil inorganic phosphorus in Lismore stony silt loam due to application of superphosphate to pasture

Grigg¹

1966

New Zealand Journal of Agricultural Research

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Changes in available phosphorus (as extracted by the Truog and Olsen methods) and in phosphorus held in the soil in aluminium-, iron-, and calcium-bound forms have been followed on soil samples taken from a rates of superphosphate trial on irrigated pasture from 1952 to 1964.Truog phosphorus levels in samples taken at three-monthly intervals showed a cyclic pattern due to the annual fertiliser applications, the fluctuations being greater at higher rates of superphosphate.In samples taken just before top-dressing each autumn, 3 cwt and 4t cwt of superphosphate applied annually caused a net increase in levels of aluminium-, iron-, and calcium-bound phosphorus, the aluminium-bound form increasing more than the other two forms. However. this form was also depleted at a greater rate than iron-or calcium-bound phosphorus during the residual phase of the trial. On these samples, the Truog and Olsen methods gave a pattern of phosphorus accumulation and depletion closely correlated with the aluminium-bound form, which is considered to be the most important source of phosphorus for plant uptake on this soil type.

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“…A lesser amount of the variation in P uptake by the bromegrass was explained by the fractionation, the totalbeirrg3IVo. As could be expected from (5,8,11). The H,SO-soluble fraction has been found to be Table 4 showed that the addition of the second variable, the For personal use only.…”

Section: Distribution Of Phosphorus Fractionsmentioning

confidence: 68%

“…Because of the relatively rapid migration of water-soluble P from fertilizer particles into, and reaction with, the adjacent soil, plants absorb P largely from the reaction products rather than from the form initially present in the fertilizer (5,10). The largest portions of fertilizer P are recovered in the NH,F-soluble and NaoH-soluble fractions (4,5,8,11) when the fractionation procedure outlined by Chang and Jackson (6) is employed.…”

Section: Introductionmentioning

confidence: 96%

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Availability of Reaction Products of Fertilizer Phosphorus to Alfalfa and Bromegrass Seedlings

Massey¹,

Sheard²,

Miller³

1970

Can. J. Soil. Sci.

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Increasing the period of contact of 3"P-lated in the NH,-F soluble fraction arrd 30Vo labelled Ca(H,PO,). fertilizer with an alkaline in the NaOH-soiuble fraction. I-ess than 6Vo soil at rates of 35 and 70 pgP/g soil before was recovered in the H,SO,-soluble fraction.qlanting alfalfa and bromegrass dicreased the Uptake of fertilizer P b! aftalfa and bromedry matter yie_ld and uptake of fertilizer P by griss was negatively i:orrelated with the the plants at five weeki. Fractionation of the NaOH-soluble iractioir whereas the uptake bv soil P, accordin_g to Chang and Jackson, alfalfa was positively associated riitfr tiri, showed that 50% of the applied P accumu-NHnCl-soluble fraction.

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THE FATE OF solUBLE PHOSPHATE APPLIED TO SOILS

Cited by 48 publications

References 5 publications

Nitrogen and Phosphorus Content Changes in Paddy Soil and Water As Affected by Organic Fertilizer Application

Nitrogen and Phosphorus Content Changes in Paddy Soil and Water As Affected by Organic Fertilizer Application

Changes in forms of soil inorganic phosphorus in Lismore stony silt loam due to application of superphosphate to pasture

Availability of Reaction Products of Fertilizer Phosphorus to Alfalfa and Bromegrass Seedlings

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