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All publications of “Lenio da Silva Santos”

3 results

Nutrient Release, Plant Nutrition, and Potassium Leaching from Polymer-Coated Fertilizer

Henrique Bley, Clesio Gianello, Lenio da Silva Santos, Lisiane Priscila Roldão Selau

09/Mar/2017

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 […]

QUANTITY OF PHOSPHORUS EXTRACTED BY MEHLICH-1 AND MEHLICH-3 SOLUTIONS AS A FUNCTION OF AGITATION SPEED, TIME OF CONTACT, AND TEMPERATURE

Lenio da Silva Santos, Leandro Souza da Silva, Alberto Cargnelutti Filho, Gustavo Griebeler

01/Jan/2015

To produce reliable analytical data in a laboratory, all the stages of the analysis protocol must be properly understood and controlled. Extraction of soil P may thus be compromised by the conditions of analysis, and this may explain variability in results. Therefore, the objective of this study was to verify the effect of deviations in agitation speed, time of soil/ solution contact, and environmental temperature on extraction of soil P by Mehlich-1 (M-1) and Mehlich-3 (M-3). The study was conducted […]

Analytical variability of phosphorus extracted by Mehlich-1 and Mehlich-3 caused by soil particle size, container type and container void volume

Lenio da Silva Santos, Leandro Souza da Silva, Alberto Cargnelutti Filho, Gustavo Griebeler

01/Oct/2014

Even following the protocol recommended by the method of analysis, variations in analytical results can be caused by the way samples, or the kind of materials used in the analysis, are handled. The objective of this study was to evaluate the influence of soil particle size, the type of extraction container, and the container void volume on soil P content extracted by Mehlich-1 and Mehlich-3. In the first experiment, soil samples were ground to pass through sieves with 2.000, 1.700, […]