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Characterization of soil chemical properties of strawberry fields using principal component analysis Rev. Bras. Ciênc. Solo
Islabão,Gláucia Oliveira; Pinto,Marília Alves Brito; Selau,Lisiane Priscila Roldão; Vahl,Ledemar Carlos; Timm,Luís Carlos.
One of the largest strawberry-producing municipalities of Rio Grande do Sul (RS) is Turuçu, in the South of the State. The strawberry production system adopted by farmers is similar to that used in other regions in Brazil and in the world. The main difference is related to the soil management, which can change the soil chemical properties during the strawberry cycle. This study had the objective of assessing the spatial and temporal distribution of soil fertility parameters using principal component analysis (PCA). Soil sampling was based on topography, dividing the field in three thirds: upper, middle and lower. From each of these thirds, five soil samples were randomly collected in the 0-0.20 m layer, to form a composite sample for each third. Four...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fragaria x ananassa Duch; Soil fertility; Multivariate analysis; Temporal variability.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100017
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Nutrient Release, Plant Nutrition, and Potassium Leaching from Polymer-Coated Fertilizer Rev. Bras. Ciênc. Solo
Bley,Henrique; Gianello,Clesio; Santos,Lenio da Silva; Selau,Lisiane Priscila Roldão.
ABSTRACT The increase in food consumption and limitations in food production areas requires improved fertilizer efficiency. Slow- or controlled-release fertilizers are an alternative for synchronizing nutrient availability with the plant demands, reducing losses to the environment. The aim of this study was to evaluate the efficacy of polymer-coated KCl compared with conventional KCl. The products were incubated in soil under controlled conditions to evaluate the time required for nutrient release. A greenhouse experiment was performed with corn plants in pots with loamy sand- or clay-textured soil types to evaluate plant nutrition and losses due to leaching. The K application rates were 0, 18, 36, and 54 mg dm-3. The pots were irrigated, and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enhanced efficiency; Slow- or controlled-release; Leaching.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100509
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