Availability of Rock and other Phosphate Fertilizers as Influenced by Lime and Form of Nitrogen Fertilizer<sup>1</sup>

Volk, Garth W.

doi:10.2134/agronj1944.00021962003600010006x

Cited by 10 publications

(4 citation statements)

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“…The results from this preliminary experiment clearly show that the form of N fertilizer can have considerable influence on the plant uptake of P from phosphate rock and soil and supports earlier results obtained by Jones [8], Terman et al [21] and Volk [23]. In this study, by physically banding together nitrogen fertilizer and SPR it was possible to increase the uptake of P from SPR.…”

Section: The Mode Of Influence Of N Form On the Uptake Of P By The Plantsupporting

confidence: 90%

“…Companion applications of reactive phosphate rocks could exploit this acidity. To our knowledge few studies have examined this subject [2,8,21,23] and only Chien [2] has studied chemical changes that occur in the soil when nitrogen fertilizers and phosphate rocks are applied in combination to soil. This paper reports on two preliminary experiments which were designed to firstly study the effect of nitrogen fertilizer form on the amount of plant available P released from Sechura phosphate rock and secondly to study the nature of the chemical interactions responsible for urea and ammonium sulphate fertilizers causing increased dissolution of the phosphate rock.…”

Section: Introductionmentioning

confidence: 99%

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The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

Apthorp

Hedley

Tillman

1987

Fertilizer Research

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words: Sechura phosphate rock, plant-availability of phosphate rock, nitrogen fertilizer/ phosphate rock interactions, phosphate rock dissolution and soil pH Abstract. A glasshouse trial using lettuce as the test crop, and laboratory incubations were used to evaluate the influence of various nitrogen fertilizers on the availability of phosphate from an unfertilized loamy sand soil and from the same soil fertilized with Sechura phosphate rock or monocalcium phosphate. The order in which nitrogen fertilizer form increased plant yield and P uptake from soil alone and from soil fertilized with the rock was ammonium sulphate > sulphurised urea > ammonium nitrate > urea > potassium nitrate. For each rock application (both 30 and 60 rag/pot) and for soil alone, increased P uptake by the plant correlated well with decreased soil pH. In soil fertilized with the soluble P form, monocalcium phosphate, the form of the nitrogen fertilizer had little effect on plant P uptake. Subsequent laboratory incubation studies showed that increased dissolution of soil-P or Sechura phosphate rock did not occur until acidity, generated by nitrification or sulphur oxidation of the fertilizer materials, had lowered soil pH to below 5.5. A sequential phosphate fractionation procedure was used to show that in soils treated with the acidifying nitrogen fertilizers, ammonium sulphate and urea, there was considerable release of Sechura phosphate rock P to the soil, amounting to 42% and 27% of the original rock P added, respectively.

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Section: The Mode Of Influence Of N Form On the Uptake Of P By The Plantsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

Apthorp

Hedley

Tillman

1987

Fertilizer Research

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“…Bureau and his coworkers (5) reported results of a field study conducted in Ohio in which soybeans were used as the test crop: Data on phosphorus uptake by the crop indicated that FTP was less effective than was CSP. Yolk (25), using oats and sorghum in a greenhouse tes.t, found FTP to be inferior to SP.…”

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confidence: 99%

Crop Response to Fused Tricalcium Phosphate

Seatz¹,

Tisdale²,

Winters

1954

Agronomy Journal

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“…Several studies have been reported on the effects of addition of various N sources and elemental S on PR dissolution. Greenhouse studies by Volk (1944) on the effect of urea or ammonium sulfate mixed with Tennessee PR on oat (Ouercus sp) and sorghum (Sorghum vulgaret yields showed that these compounds increased dry matter yields.…”

Section: Incorporation Of Additivesmentioning

confidence: 99%

Release and phytoavailability of phosphorus in soils treated with phosphate rocks and organic acids

Kpomblekou-Ademawou¹

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Availability of Rock and other Phosphate Fertilizers as Influenced by Lime and Form of Nitrogen Fertilizer¹

Cited by 10 publications

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The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

Crop Response to Fused Tricalcium Phosphate

Release and phytoavailability of phosphorus in soils treated with phosphate rocks and organic acids

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Availability of Rock and other Phosphate Fertilizers as Influenced by Lime and Form of Nitrogen Fertilizer1

Cited by 10 publications

References 0 publications

The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

The effects of nitrogen fertilizer form on the plant availability of phosphate from soil, phosphate rock and mono-calcium phosphate

Crop Response to Fused Tricalcium Phosphate

Release and phytoavailability of phosphorus in soils treated with phosphate rocks and organic acids

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Product

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About

Availability of Rock and other Phosphate Fertilizers as Influenced by Lime and Form of Nitrogen Fertilizer¹