Phosphate sorption approach for determining phosphorus requirements of wheat in calcareous soils

Memon, Kazi Suleman; Puno, Haji Khan; Fox, R. L.

doi:10.1007/bf01048857

Cited by 16 publications

(7 citation statements)

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“…Then, the curves in Figure 2 can in principle be used to predict the actual P concentration in the soil solutionindeed taking into account that the 95% prediction intervals are broad (of the order of AE 1). The P sorption curves constructed using 0.01 M CaCl 2 as background electrolyte have been used to predict the amount of fertilizer P to be added to the soil to reach the external P requirement, that is, the concentration of P in solution that is associated with adequate plant nutrition (Fox & Kamprath, 1970;Fox, 1981;Memon et al, 1991;Sarfraz et al, 2009;Hue & Fox, 2010). The concentration of P in equilibrated suspensions of soil in 0.01 M CaCl 2 extracts that are associated with near maximum plant yields (i.e.…”

Section: Phosphorus Concentration In Different Extractsmentioning

confidence: 99%

“…The I and Q factors are integrated in the Q ‐ I curves, also called P adsorption isotherms or P sorption curves, which can be determined in the laboratory at conditions mimicking those of real soils. The P sorption approach has been shown to be useful to estimate the P fertilizer dose to reach the external requirement of the crop, that is, the concentration of P in the soil solution that is associated with near maximum yield (Beckwith, ; Fox, ; Memon et al ., ; Sarfraz et al ., ).…”

Section: Introductionmentioning

confidence: 99%

“…The I and Q factors are integrated in the Q-I curves, also called P adsorption isotherms or P sorption curves, which can be determined in the laboratory at conditions mimicking those of real soils. The P sorption approach has been shown to be useful to estimate the P fertilizer dose to reach the external requirement of the crop, that is, the concentration of P in the soil solution that is associated with near maximum yield (Beckwith, 1965;Fox, 1981;Memon et al, 1991;Sarfraz et al, 2009). In contrast to the P sorption curves, conventional soil P tests used in routine soil analyses consist of a single measurement intended to estimate the P status of the soil and provide the basis for managing P fertility (Beegle, 2005).…”

Section: Introductionmentioning

confidence: 99%

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Extraction with 0.01 m CaCl₂ underestimates the concentration of phosphorus in the soil solution

Sánchez-Alcalá

Campillo

Torrent

2014

Soil Use and Management

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The aim of this paper was to compare the concentration of P in soil extracts prepared with water and a ‘soil solution proxy’ (‘SSP’, that is, a salt solution similar in ionic composition and strength to the actual soil solution) with that in 0.01 m CaCl2 extracts, which is usually taken as a measure of soil P intensity. Seventy widely ranging agricultural soils from the Mediterranean part of Spain were used. Soil/solution ratio was 1:10 and extraction time 3 days. For 0.01 m CaCl2, a short extraction time of 30 min was also used as the reference method. CaCl2‐P(3 days) and CaCl2‐P(30 min) were not significantly different for the 40 noncalcareous soils group, but CaCl2‐P(3 days) was significantly larger than CaCl2‐P(30 min) for the 30 calcareous soils group. The Water‐P/CaCl2‐P(30 min) ratio was not significantly related to any soil property, its mean being 6.3 for the noncalcareous and 5.8 for the calcareous soils group. The mean SSP‐P/CaCl2‐P(30 min) ratio was 2.6 for the noncalcareous and 3.1 for the calcareous soils group, and decreased slightly with increasing ionic strength of the soil solution in the noncalcareous soils group. These results are consistent with the promoting influence of the Ca ion and ionic strength on P adsorption by permanent‐charge soils. The fact that extraction with 0.01 m CaCl2 generally results in underestimation of the actual concentration of P in the soil solution should be considered when CaCl2‐P is used as a soil P test.

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Section: Phosphorus Concentration In Different Extractsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extraction with 0.01 m CaCl₂ underestimates the concentration of phosphorus in the soil solution

Sánchez-Alcalá

Campillo

Torrent

2014

Soil Use and Management

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“…Most of Pakistan soils are calcareous in nature, which are not only low in the parent material containing the phosphorus mineral but its alkaline nature further reduces its availability in soil. Most of the soils in Pakistan contain less than 10 mg P2O5 kg -1 soil [3]. Wheat occupied more than 36.3 of the total cropped area of Pakistan which is still below the average production of wheat as compared with developing countries [4].…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Phosphorous Fertilizers in Wheat Crop Production in Pakistan

Jamal

Fawad²

2019

JHPR

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Phosphorus is that element of periodic table, which is extensively found in nature and along with Nitrogen (N) and potassium represents the overall composition of plants and animal life. Phosphorus performed different metabolic activities in plants and is one of the key elements for the maturation of plants and boosting up the larger quantities. As it has a vital role in the metabolism and energy production reaction and can survive the unfavorable environmental effects so cause increase in yield. A research review was carried out on the effectiveness of P fertilizers on wheat crop in Pakistan. Almost all of the researchers in all areas indicated that P fertilizers significantly improved the growth as well as yield parameters of wheat crop. But the optimum rate of P fertilizer at which highest yield recorded was different for each area, soil and environmental condition. Although these findings on P fertilization representing many capable results regarding to yield and yield components of wheat but still further research is strongly recommended to evaluate the dynamics of P in soil as well as the interaction effect of P with other micro and macro nutrients.

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“…Data on the relationship between P concentration and yield were collected mostly from the work of Fox and co-workers (Fox 1979(Fox , 1981Fox and Kamprath 1970;Fox and Kang 1978;Fox et al 1974;Fox, Plunknett, and Whitney 1968;Fox, Saunders, and Rajan 1986;Lin and Fox 1987;Memon and Fox 1983;Memon, Puno, and Fox 1991;Nishimoto, Fox, and Parvin 1977;Peaslee and Fox 1978;Roy and DeDatta 1985;Vander Zaag et al 1979). These P critical levels (Table 2) range from 0.005 mg L 21 for mycorrhizal cassava to 0.20 for nonmycorrhizal cassava and 0.40 for mycorrhizal onions to 1.6 for nonmycorrhizal onions.…”

Section: Reported P Concentrations In Soil Solution Associated With Nmentioning

confidence: 99%

Predicting Plant Phosphorus Requirements for Hawaii Soils using a Combination of Phosphorus Sorption Isotherms and Chemical Extraction Methods

Hue¹,

Fox²

2010

Communications in Soil Science and Plant Analysis

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Phosphorus (P) is an essential nutrient for plant growth and reproduction. One of the tasks of soil testing is to identify whether the soil P level is sufficient to meet crop requirements, and if not, to provide an estimate of the quantity of P that must be added for good growth of a given crop. Data for 12 soils (11 series) from Hawaii were used to develop correlations between critical P concentrations in soil solution derived from P sorption isotherms with P extracted with Mehlich 3, Olsen, or modified Truog solutions. Extractable P, in turn, was correlated with P fertilizer requirements. Critical P levels in soil solution reported in the literature for various crops ranged from 0.005 mg L 21 for cassava (Manihot esculenta) to 0.30 for lettuce (Lactuca sativa) and to 1.6 for nonmycorrhizal onions (Allium cepa). The P buffer coefficient, defined as the ratio of fertilizer P added to extractable P, averaged 2.2, 4.2, and 8.6 for the modified Truog, Olsen, and Mehlich 3, respectively. Phosphorus requirements for certain crops could be estimated by the following steps: (i) obtaining (possibly one time only) soil solution P levels via P sorption isotherm for a given soil (series or family), (ii) identifying the critical soil solution P for a given crop from the literature, (iii) regressing soil solution P against extractable P, and (iv) establishing relationships between extractable P and fertilizer P.

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Phosphate sorption approach for determining phosphorus requirements of wheat in calcareous soils

Cited by 16 publications

References 3 publications

Extraction with 0.01 m CaCl₂ underestimates the concentration of phosphorus in the soil solution

Extraction with 0.01 m CaCl₂ underestimates the concentration of phosphorus in the soil solution

Effectiveness of Phosphorous Fertilizers in Wheat Crop Production in Pakistan

Predicting Plant Phosphorus Requirements for Hawaii Soils using a Combination of Phosphorus Sorption Isotherms and Chemical Extraction Methods

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Phosphate sorption approach for determining phosphorus requirements of wheat in calcareous soils

Cited by 16 publications

References 3 publications

Extraction with 0.01 m CaCl2 underestimates the concentration of phosphorus in the soil solution

Extraction with 0.01 m CaCl2 underestimates the concentration of phosphorus in the soil solution

Effectiveness of Phosphorous Fertilizers in Wheat Crop Production in Pakistan

Predicting Plant Phosphorus Requirements for Hawaii Soils using a Combination of Phosphorus Sorption Isotherms and Chemical Extraction Methods

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Extraction with 0.01 m CaCl₂ underestimates the concentration of phosphorus in the soil solution

Extraction with 0.01 m CaCl₂ underestimates the concentration of phosphorus in the soil solution