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49 results

Sampling Layer for Soil Fertility Evaluation in Long-Term No-Tillage Systems

Renan Costa Beber Vieira, Sandra Mara Vieira Fontoura, Cimélio Bayer, Paulo Roberto Ernani, Ibanor Anghinoni, Renato Paulo de Moraes


ABSTRACT In no-tillage (NT) systems, there is no plowed layer since the soil is not tilled. Thus, the soil layer for fertility evaluation can be defined as the one in which the fertility indices are affected by the surface application of lime and fertilizers and soil properties have the closest relationship with crop yields. The objective of this study was to determine the most appropriate soil layer under long-term NT for sampling for fertility evaluation in the South-Central region of […]

Boron Leaching Decreases withIncreases on Soil pH

Alessandra Aparecida de Sá, Paulo Roberto Ernani


ABSTRACT Management of boron fertilization depends on the magnitude of B leaching in the soil profile, which varies proportionally with the concentration of B in the soil solution, which, in turn, decreases as the soil pH increases due to the higher sorption of B on soil solid surfaces. The objective of this study was to quantify the effect of liming and rates of B applied to the soil on B leaching. The experiment was carried out in the laboratory in […]

Sugarcane root biomass in no-tillage and convencional systems with and without liming

Tadeu Nascimento Cury, Isabella Clerici De Maria, Denizart Bolonhezi


The cultivation system can influence physical and chemical soil properties by changing the root development of crops. The aim of this study was to evaluate the effect of no-tillage (NT) and conventional tillage (CT) and of liming (0 and 2.0 t ha-1) on the root system of sugarcane. The study was conducted on an Oxisol in a long-term experiment initiated in 1998, after three sugarcane cycles of four years without burning the cane trash at harvest. The soil was sampled […]

Phosphorus availability in oxidic soils treated with lime and silicate applications

Aline da Silva Sandim, Leonardo Theodoro Büll, Ariane Reis Furim, Géssica da Silva Lima, Jader Luis Nantes Garcia


Based on the assumption that silicate application can raise soil P availability for crops, the aim of this research was to compare the effect of silicate application on soil P desorption with that of liming, in evaluations based on two extractors and plant growth. The experiment was carried out in randomized blocks with four replications, in a 3 × 3 × 5 factorial design, in which three soil types, three P rates, and four soil acidity correctives were evaluated in […]

Forms of lime application, cover crops and nitrogen rates in maize

Aguinaldo José Freitas Leal, Edson Lazarini, Leandro Rebuá Rodrigues, Luiz Henrique Marcandalli


The no-tillage (NT) management is widely used in the Cerrado region, but some questions remain unanswered, for example about the need of liming and adequate nitrogen rates for commercial crops when preceded by cover crops. Our objective was to evaluate the effect of precedent cover crops on the maize demand for nitrogen fertilization and forms of liming preceding the adoption of no-tillage management (NT) in different growing seasons. The experiment was arranged in a randomized block factorial design 5 x […]

Evaluation of Sikora instead of SMP buffer to estimate the potential acidity of brazilian soils

Maria Alice Santanna, João Kaminski, Danilo dos Santos Rheinheimer, Jaderson dos Anjos Toledo, Carlos Alberto Casali


Despite the efficiency of the Shoemaker, McLean, Pratt (SMP) buffer method in estimating soil acidity, the presence of p-nitrophenol and potassium chromate in the solution, both hazardous substances, has caused increasing environmental concerns. The purpose of this study was to test Sikora method (Sikora, 2006) as an alternative to the adapted SMP buffer method, generally used to estimate potential acidity of Southern Brazilian soils. For the test, 21 soils in the South and Cerrado regions of Brazil were sampled. (1) […]

Response of Epidendrum Ibaguense (orchidaceae) to the application of lime rates to the pot

Donizetti Tomaz Rodrigues, Roberto Ferreira Novais, Víctor Hugo Alvarez V, José Maria Moreira Dias, Ecila Mercês de Albuquerque Villani


In the best cultivation methods of orchids, in particular of the genus Phalaenopsis, liming is a common practice. The objective of this study was to evaluate the influence of lime rates (0.0; 1.0; 2.0; 3.0; 4.0; and 5.0 g dm-3 of substrate) applied to the cultivation substrate (xaxim) on the growth of Epidendrum ibaguense seedlings. In a greenhouse, 1-L plastic pots filled with 0.8 dm3 of xaxim were irrigated such that no leachate was lost during the experiment. N, P, K, Ca, Mg, […]

Influence of cattle manure and limestone on residual effects of phosphorus fertilizer in Brachiaria brizantha grown after common bean

Renato Ferreira de Souza, Valdemar Faquin, Rodrigo Reis Lima Sobrinho, Eliezer Augusto Baeta de Oliveira


Phosphorus (P) deficiency is one of the most widespread limitations to the establishment and maintenance of pastures in tropical areas. This deficiency is mainly due to the low soil P content and adsorption/precipitation processes. The purpose of this study was to evaluate the influence of manure and lime applications on the residual effect of phosphorus applied to common bean on phosphorus nutrition and yield of Brachiaria brizantha grown in succession. Four experiments were conducted in a greenhouse, in a completely […]

Application of lime with different reaction degrees: chemical changes in soil under corn

Suzana Romeiro Araújo, José Alexandre Melo Demattê, Fernando José Garbuio


With acidity correction, important nutrients for the corn development become more available to the plants, increasing yield. The objective of this study was to evaluate chemical changes in two soils and corn dry matter yield as affected by lime application with different degrees of reaction. The experiment was carried out in a greenhouse on a Oxisol and a Quartzpsament. Three rates of three commercial limes were applied, one with mean reactivity A (RE = 85.7 %; PRNT = 88.3 %), […]

Evaluating available boron and soybean response to boron in an oxisol from central-western Brazil

Ciro Antonio Rosolem, Leandro Zancanaro, Thaís Bíscaro


Based on field observations it is often impossible to detect differences in soil B contents after the application of B fertilizers, even when increased leaf B contents are detected. This has raised doubts as to the efficacy of the B extractor used in routine soil B determinations. An experiment was conducted to study B extraction and availability to soybean in an Oxisol in the state of Mato Grosso. Boron (as boric acid) doses ranging from 0.0 to 10.0 kg ha-1 […]

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