The Determination of the Readily Available Phosphorus of Soils<sup>1</sup>

Truog, E.

doi:10.2134/agronj1930.00021962002200100008x

Cited by 478 publications

(195 citation statements)

References 2 publications

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“…This soil showed a high P-fixing capacity and a large amount of organic matter. The plow layer of the soil (to a depth of 15 cm) had a pH of 5.9 (in water), a soil-test P (Truog-P;Truog 1930) ) for agricultural upland Andosols based on the Soil Fertility Enhancement Act in Japan. The TP content, which was measured using the method of Legg and Black (1955), was 1.93 g P kg −1 .…”

Section: Methodsmentioning

confidence: 99%

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Effects of phosphorus-based application of animal manure compost on the yield of silage corn and on soil phosphorus accumulation in an upland Andosol in Japan

Komiyama

Ito

Saigusa

2014

Soil Science and Plant Nutrition

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Animal manure contains significant amounts of nitrogen (N) and phosphorus (P) that can be utilized as fertilizer. However, manure application rates are generally set to meet crop N demand, which results in excess P application which increases the risk of P loss into bodies of water. We examined the application method of manure compost based on crop P demand on the dry matter yield of silage corn (Zea mays L. var. indentata), on nutrient uptake and on soil P accumulation in an upland Andosol with a high P-fixing capacity. Cattle and poultry manure composts (CMC and PMC) with different P solubility were applied to meet the crop's N requirements (N-based application) or P requirements (P-based application) in 3 consecutive years. Supplemental N was applied using polyolefin-coated urea in the P-based treatments. The dry matter yields and nutrient uptakes of silage corn in the P-based CMC and PMC application systems were similar to those in the corresponding N-based systems. The average relative efficiency of N in CMC (33%) was close to the predicted value (30%) during the study. On the other hand, the relative efficiency of N in PMC (42%) was higher than the predicted value (28%). The average relative efficiency of P from CMC and PMC was 109% and 50%, respectively. These were higher than the predicted values based on the available P proportion (the sum of water-and sodium bicarbonate-soluble P) for CMC (78%) and PMC (34%), indicating that the available P fraction in the manure composts was more effective than that in P fertilizer for corn growth or that the other P fractions were also effective for corn. P-based manure compost application lowered the soil P accumulation to between 41 and 43% of the value in the N-based accumulation (versus a value of between 31 and 40% of that value for soil Truog-P). Compared to N-based manure compost application, P-based manure compost application with supplemental N fertilizer produced similar dry matter yields of corn and suppressed soil P accumulation in the upland Andosol field.

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Section: Methodsmentioning

confidence: 99%

“…The samples were air-dried and passed through a 2-mm mesh, but without grinding to exclude coarse particles. The available P was determined as Truog-P (Truog 1930). The total inorganic P content was measured colorimetrically after extracting the soil with hot hydrochloric acid.…”

Section: Analysis Of Plants and Soilmentioning

confidence: 99%

Effects of phosphorus-based application of animal manure compost on the yield of silage corn and on soil phosphorus accumulation in an upland Andosol in Japan

Komiyama

Ito

Saigusa

2014

Soil Science and Plant Nutrition

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“…were collected from the trial at laying down and at approximately three-monthly intervals. These have been examined for available phosphorus status by the modified Truog method (Truog 1930) as used in the Department of Agriculture advisory service.…”

Section: Sampling and Soil Analysismentioning

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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“…The amount of available P extracted by 0.001 M H 2 S0 4 and (NH4)2S04 solution at pH 3.0 (Truog 1930) was measured by the molybdophosphoric blue method. Particle size distribution was determined by the pipette method.…”

Section: Methodsmentioning

confidence: 99%

Physicochemical properties of the soils associated with shifting cultivation in Northern Thailand with special reference to factors determining soil fertility

Funakawa

Tanaka

Kaewkhongkha

et al. 1997

Soil Science and Plant Nutrition

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The Determination of the Readily Available Phosphorus of Soils¹

Cited by 478 publications

References 2 publications

Effects of phosphorus-based application of animal manure compost on the yield of silage corn and on soil phosphorus accumulation in an upland Andosol in Japan

Effects of phosphorus-based application of animal manure compost on the yield of silage corn and on soil phosphorus accumulation in an upland Andosol in Japan

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

Physicochemical properties of the soils associated with shifting cultivation in Northern Thailand with special reference to factors determining soil fertility

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The Determination of the Readily Available Phosphorus of Soils1

Cited by 478 publications

References 2 publications

Effects of phosphorus-based application of animal manure compost on the yield of silage corn and on soil phosphorus accumulation in an upland Andosol in Japan

Effects of phosphorus-based application of animal manure compost on the yield of silage corn and on soil phosphorus accumulation in an upland Andosol in Japan

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

Physicochemical properties of the soils associated with shifting cultivation in Northern Thailand with special reference to factors determining soil fertility

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The Determination of the Readily Available Phosphorus of Soils¹