New methods for estimating lime requirement to attain desirable pH values in Brazilian soils

Teixeira, Welldy Gonçalves; Álvarez, V Víctor Hugo; Neves, Júlio César Lima

doi:10.36783/18069657rbcs20200008

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…The second principal component (PC2) explained 16.5% of the variance in soil parameters and had greatest contributions (in descending order) from soil OM, exchangeable Al, CEC, potential acidity, Al saturation, and pH. These parameters all relate to soil pH buffering capacity (Teixeira, Alvarez, & Neves, 2020). The third principal component (PC3) (10.4% of variance in soil parameters) and the fourth principal component (PC4) (5.4% of variance in soil parameters) had the greatest contributions from remaining P sorption capacity ( S rem ) and K, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Given the soil variables contributing to PC2-OM, exchangeable Al, CEC, potential acidity (H + Al), and Al F I G U R E 3 Boxplots of soybean yield response (g dry grain per plant) by site (A or B) and treatment (0, 50, and 100% of standard field P fertilization of 38 kg P ha −1 ) saturation (negatively correlated to PC2), as well as pH (positively correlated to PC2) ( Figure 2)-the observed effect appears to be related to differences in the degree to which liming has decreased soil acidity. Organic matter is the primary source of soil buffering capacity in Brazilian Oxisols (de Sá Mendonça, Rowell, Martins, & da Silva, 2006), and more lime is required for neutralization of soil acidity when soils have greater OM (Teixeira et al, 2020). Here, based on multiple regression, potential acidity (PA) was positively related to OM (p = .045) and clay (p = .080) (model: PA ∼ 0.06314 OM + 0.02190 clay -0.11098, multiple R 2 = .21, adjusted R 2 = .15, p = .041).…”

Section: Soybean Yield Responsementioning

confidence: 99%

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Tropical soybean yield response to reduced or zero phosphorus fertilization depends on soils

Bomeisl

Neill

Porder

et al. 2020

Agrosystems Geosci & Env

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Oxisol soils with high P sorption capacity are widespread in Brazil, which is the world's second largest producer of soybean [Glycine max (L.) Merr.]. To counter low P availability within highly weathered soils, Brazilian soybean producers commonly fertilize with approximately twice as much P as is harvested in soybean. This has led to the accumulation of P in the soil, especially during the 2000s and 2010s, but the degree to which producers can capitalize on this residual soil P stock to offset fertilizer inputs remains unclear. We tested the effect of residual soil P in a field trial in Mato Grosso, Brazil on a field that has been fertilized for a decade. We grew soybean under three P treatments: 0, 50, and 100% of the farm's standard P fertilization rate for soybean (38 kg P ha −1 yr −1). This experiment was conducted for one growing season on two sites within the same farm field that had different soil texture, Al 2 O 3 + Fe 2 O 3 (R 2 O 3), soil test P, and degree of P saturation. Soybean yield on the soil with greater clay content and R 2 O 3 showed yield declines under reduced P input but yields on sandier soils that had higher soil test P were unaffected by reduced P inputs. These results highlight opportunities to enhance P fertilizer use efficiency in intensive tropical agriculture on highly weathered soils by using site-specific soil fertility management to harness residual soil P.

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Section: Resultsmentioning

confidence: 99%

Section: Soybean Yield Responsementioning

confidence: 99%

Tropical soybean yield response to reduced or zero phosphorus fertilization depends on soils

Bomeisl

Neill

Porder

et al. 2020

Agrosystems Geosci & Env

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show abstract

“…There are different methods for recommending liming, with empirical models based on the dose per area (Parecido et al, 2021) or base saturation (Raij, 1981). The latter is being the most used although criticized for the linearity between the soil pH and the limestone total neutralizing power (TNP) (Teixeira et al, 2020). Although the most common practice for acidity correction is liming, the application of Ca and Mg silicate in place of limestone has been carefully studied with satisfactory results (Deus et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Limestone and Silicate Applications by Different Methods to Correct Soil Acidity

Mar¹,

Biscaro²,

Dupas³

et al. 2022

JAS

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The study aimed to measure the variation in the values of pH, P, K, Ca, Mg, Al, H+Al, V, and Ca and Mg saturation after limestone and silicate applications as a function of different soil correction methods and incubation periods under a controlled environment. The research was carried out in a greenhouse at the FCA of the Federal University of Grande Dourados (UFGD). The experiment was completely randomized in a factorial scheme (5 × 3 × 5), with four replications. The main factors consisted of five incubation times: 0, 30, 60, 90, and 120 days; three soil classes: dystrophic Red Latosol (LVd), Dystroferric Red Latosol (LVdf), and dystrophic Gray Argisol (PACd); and five soil acidity correction methods: control, Ca/Mg balance for limestone and silicate, and 50% and 70% base saturation. Chemical analysses were performed after each incubation period. A regression analysis was carried out once a significant difference was observed between the means of the main factors of the analysis of variance, being adjusted to quadratic models for pH, P, Al, K, Ca, Mg, H+Al, and V. Statistical analyses were performed in the AgroStat software. The ideal soil incubation time to reach the maximum efficiency of correction of the chemical attributes of LVd, LVdf, and PACd soils by the studied methods ranges from 78 to 86 days. The application of limestone by balance of 60% Ca and 20% Mg and calcium and magnesium silicates achieved the best correction indexes of soil chemical attributes, enabling the proposed equation as a calcium and magnesium silicate calculation.

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“…To exceed the agronomic limitations associated to the acidity of soils, they are treated with products that contribute calcium, magnesium or both (Ca and Mg), capable of reducing the acidity and increasing the pH of soils to a specific degree, depending on the neutralization value of the product (type of product and purity), the relative efficiency (particle diameter of the product), and the buffer capacity of the soil (Chimdi et al, 2012). However, although the technical foundations that determine the effectiveness of liming products are known, the classic methods to establish the dose of lime do not consider the level of pH that is intended to be increased in the soil, since they are mostly based on the concentration of exchangeable aluminum or the degree of saturation of bases (Teixeira et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Buffer capacity as a method to estimate the dose of liming in acid soils

Tutivén

Suarez

Vásconez-Montúfar

2022

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Objective: The study proposes using the dolomite buffer capacity (BCDolomite) as a method of estimating the lime requirement in soils that agronomically require a pH increase. Design/methodology/approach: In six soil samples with different levels of response to the application of dolomite, the organic matter (OM), the content of sand, silt and clay, pH, K, Ca, Mg and the potential acidity (Al+H) were determined. Assuming an apparent density of 1000 kg/m3 and a volume per hectare of 2000 m3, the soils were placed in polyethylene containers and treated with dolomite in doses equivalent to 0, 750, 1500, 2250 and 3000 kg/ha, establishing the BCDolomite as the inverse of the slope resulting from the relationship between the pH and the dose of dolomite. Results: In soils with low response to the dolomite, the content of clay and OM was 280 and 26 g/kg, respectively, and in high response soils, the content of clay and OM was 240 and 47 g/kg, respectively. In all cases, a simple and direct linear relationship was observed (R2 > 0.85; p < 0.05) in the relationship between pH and dose of dolomite. Limitations on study/implications: The results obtained under controlled conditions show that BCDolomite constitutes a viable method to estimate the lime requirement. Findings/conclusions: The BCDolomite showed sensitivity to the complexity of the clay fraction and to the organic matter in the soil, for which the dolomite requirement is equal to the product of the desired pH increase and the BCDolomite

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New methods for estimating lime requirement to attain desirable pH values in Brazilian soils

Cited by 6 publications

References 47 publications

Tropical soybean yield response to reduced or zero phosphorus fertilization depends on soils

Tropical soybean yield response to reduced or zero phosphorus fertilization depends on soils

Limestone and Silicate Applications by Different Methods to Correct Soil Acidity

Buffer capacity as a method to estimate the dose of liming in acid soils

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