Comparison of Methods for Determining Critical Concentrations of Soil Test Phosphorus for Corn

Mallarino, Antonio P.; Blackmer, A. M.

doi:10.2134/agronj1992.00021962008400050017x

Cited by 145 publications

(119 citation statements)

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“…Critical value of soil Olsen-P is generally considered the Olsen-P value below which crop yield responses to P application should be expected and above which crop yield response to additional P fertilizer applications are small (Mallarino and Blackmer 1992). Several methods have been used to measure the critical values.…”

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Determining critical values of soil Olsen-P for maize and winter wheat from long-term experiments in China

Hao

et al. 2009

Plant Soil

110

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The critical value of soil Olsen-P is the point above which the probability of crop yield response to fertilizer P is small or nil. Determining this critical value is fundamental when making appropriate P fertilizer recommendations. In this study, the critical values were determined for continuous maize (Zea mays L.)-winter wheat (Triticum aestivum L.) cropping systems from a 15-year field experiment across three sites in China using linear-linear, linear-plateau and Mitscherlich models. The mean critical values for maize using the three models ranged from 12.1 to 17.3 mg P kg −1 (average 15.3 mg P kg −1 ) and for winter wheat from 12.5 to 19.0 mg P kg −1 (average 16.3 mg P kg −1 ) among study sites. The mean critical value for maize was approximately 7% lower than that for winter wheat across all sites based on the three models. Critical values identified by the Mitscherlich model were 1.4 to 2.1 times those from linear-linear and 1.3 to 1.9 times of those from linear-plateau and were crop and site dependent. There was a significant negative correlation (P<0.05) between the mean critical value from the three models and the observed P uptake by either maize or wheat. Our study shows that the critical values can vary with sites, crops and models used, and thus caution should be taken when selecting the most appropriate one when making P fertilizer recommendations for agronomic return and to minimize chances of negative environment impact from overfertilization.

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Determining critical values of soil Olsen-P for maize and winter wheat from long-term experiments in China

Hao

et al. 2009

Plant Soil

110

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“…(1 have shown to have low yield response in Iowa (Mallarino and Blackmer 1992;Mallarino et al 1991), suggesting that the probability of a yield response to the addition of these nutrients would be low in these soils (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Phosphorus fertilizer by-product effect on the interaction of zinc and phosphorus in corn and soybean

Hernández¹,

Killorn²

2009

Can. J. Soil. Sci.

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R. 2009. Phosphorus fertilizer by-product effect on the interaction of zinc and phosphorus in corn and soybean. Can. J. Soil Sci. 89: 189Á196. The application of high phosphorus fertilizer by-products to farmland is a common practice used to reduce storage volume and disposal cost. However, because Iowa soils are generally high in both phosphorus and zinc, there are environmental and fertility questions concerning their application to farmland. A greenhouse study was conducted to determine the effect of a soil-applied fertilizer by-product on the zinc-phosphorus relationship in corn and soybean plants grown on three Iowa soil series: Belinda, Downs, and Haig. The soils were mixed with a high-phosphorus fertilizer by-product and plants were also collected and analyzed for phosphorus and zinc content and uptake. Soil samples were analyzed for phosphorus and zinc content. The experiment was repeated, switching pots to assess the residual effect after one cycle of rotation. The treatments were arranged in a totally randomized design with three replications. The results indicated that the high phosphorus fertilizer by-product increased soil and plant concentrations of phosphorus in soybean and corn plants and soils. However, the increase of P concentration did not induce changes in the phosphorus-zinc interaction in corn and soybean plants in any of the studied soils.Key words: Phosphorus, corn, soybean, zinc, sludge, by-products, Zn-P relationship, zinc-phosphorus interaction Hernandez, J. D. et Killorn, R. 2009. Effet des sous-produits phosphate´s des engrais sur l'interaction du zinc et du phosphore chez le maı¨s et le soja. Can. J. Soil Sci. 89: 189Á196. L'e´pandage de sous-produits des engrais riches en phosphore sur les terres agricoles est une pratique couramment employe´e pour re´duire les stocks et les couˆts d'enfouissement. Les sols de l'Iowa e´tant ge´ne´ralement riches en phosphore et en zinc, l'application de tels sous-produits suscite des interrogations au niveau de l'environnement et de la fertilite´du sol. Les auteurs ont effectue´une e´tude en serre en vue de pre´ciser l'effet de l'application d'un tel sous-produit sur les liens entre le zinc et le phosphore dans le maı¨s et le soja cultive´s sur trois types de sols de l'Iowa : Belinda, Downs et Haig. Ils ont me´lange´au sol un sous-produit des engrais riche en phosphore, puis les plantes ont e´te´recueillies et analyse´es afin d'e´tablir leur teneur en phosphore et en zinc et l'absorption de ces e´le´ments. On a ensuite dose´la concentration de phosphore et de zinc dans des e´chantillons de sol. L'expe´rience a e´te´re´pe´te´e avec permutation des pots afin d'e´valuer l'incidence des re´sidus apre`s une rotation. Les auteurs ont re´pe´te´l'expe´rience trois fois en randomisant les traitements. Les re´sultats indiquent que le sous-produit riche en phosphore accroıˆt la concentration de cet e´le´ment dans le sol ainsi que dans les tissus du soja et du maı¨s. Cette hausse ne modifie toutefois pas l'interaction entre le phosphore et le zinc chez ces d...

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“…Threshold values for Olsen P and P CaCl2 were estimated according to the Cate and Nelson method (1971). This method provides threshold values for each P extraction below which the yield significantly decreased from the maximum relative yield defined for each soil and seems more accurate to define threshold values for soil P test than other methods such as the linear or quadratic plateau fittings or the Mitscherlich-type equations (Mallarino and Blackmer 1992). The critical level for the Cate-Nelson model was estimated as that value of the soil P test (P CaCl2 or Olsen P) that maximized the sum of squares between two populations of soil P test values, i.e., above and below threshold values (Geng et al 2014), using the ANOVA option of Statgraphics 5.1.…”

Section: Discussionmentioning

confidence: 99%

Calculation of threshold Olsen P values for fertilizer response from soil properties

Recena

Díaz

Campillo

et al. 2016

Agron. Sustain. Dev.

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Phosphorus (P), a non-renewable resource, needs to be used more efficiently in agriculture. This requires using soil P tests. However, the P test threshold values for fertilizer response depend on many soil properties, some of which may be useful to estimate these threshold values, others not. Therefore, we searched here which soil properties are useful to estimate P threshold values. We calculated the threshold values for Olsen P and 0.01 M CaCl 2 extractable P of 18 representative agricultural soils of the Mediterranean region of Spain. For that, we performed a P starvation experiment in which wheat and sunflower were alternatively pot-cropped. Results show that Olsen P threshold values are negatively correlated to P buffer capacity (r of −0.74, P lower than 0.001), clay content (−0.82, 0.001), pH (−0.76, 0.001), and Fe oxide content (−0.55, 0.05). Multiple regression models involving clay, pH or soil organic C, and phosphatase activity or organic hydrolysable P accounted for as much as 87 % of the variance in calculated Olsen P threshold values. In particular, there is a major effect of organic P on Olsen P threshold values. Single models based on routinely measured soil properties such as clay content and pH made accurate predictions of Olsen P threshold values with r 2 of 0.81 and P lower than 0.001.

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Comparison of Methods for Determining Critical Concentrations of Soil Test Phosphorus for Corn

Cited by 145 publications

References 7 publications

Determining critical values of soil Olsen-P for maize and winter wheat from long-term experiments in China

Determining critical values of soil Olsen-P for maize and winter wheat from long-term experiments in China

Phosphorus fertilizer by-product effect on the interaction of zinc and phosphorus in corn and soybean

Calculation of threshold Olsen P values for fertilizer response from soil properties

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