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| Rossato,Otavio Bagiotto; Andrade‑Sanchez,Pedro; Guerra,Saulo Philipe Sebastião; Crusciol,Carlos Alexandre Costa. |
| O objetivo deste trabalho foi avaliar o potencial de utilização dos sensores de reflectância e fluorescência na avaliação de teores de N‑NO3‑ no pecíolo, na produção de biomassa e na produtividade do algodoeiro. Utilizou-se o delineamento experimental de blocos ao acaso em arranjo fatorial 3x4, com quatro repetições. Os tratamentos consistiram de três variedades de algodão (ST‑4288‑B2RF, ST‑4498‑B2RF e DP-164‑B2RF) e quatro doses de N (0, 45, 90 e 135 kg ha‑1). Aos 120 dias após a semeadura, foram realizadas leituras com sensores ópticos de reflectância e fluorescência. Não houve correlação significativa dos teores de N‑NO3‑ no pecíolo com os índices de reflectância; porém, houve correlação destes com a produção de biomassa (0,39) e a produtividade (0,32 a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gossypium; Agricultura de precisão; Estado nutricional; Índices de vegetação; NDVI; Sensoriamento remoto. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000800014 |
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| Crusciol,Carlos Alexandre Costa; Foltran,Rodrigo; Rossato,Otavio Bagiotto; McCray,James Mabry; Rossetto,Raffaella. |
| Lime application recommendations for amendment of soil acidity in sugarcane were developed with a burnt cane harvesting system in mind. Sugarcane is now harvested in most areas without burning, and lime application for amendment of soil acidity in this system in which the sugarcane crop residue remains on the ground has been carried out without a scientific basis. The aim of this study was to evaluate the changes in soil acidity and stalk and sugar yield with different rates of surface application of calcium, magnesium silicate, and gypsum in ratoon cane. The experiment was performed after the 3rd harvest of the variety SP 81-3250 in a commercial green sugarcane plantation of the São Luiz Sugar Mill (47º 25' 33" W; 21º 59' 46" S), located in Pirassununga,... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Soil acidity correction; Silicon; Stalk and sugar yield; Green sugarcane. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600019 |
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| Adorna,Jaqueline Cristiane; Crusciol,Carlos Alexandre Costa; Rossato,Otavio Bagiotto. |
| The response of sugarcane to application of micronutrients is still not very well known. In view of the need for this information, the aim of this study was to evaluate the application of the micronutrients Zn, Cu, Mn, Fe, B, and Mo to plant cane in three soils, with and without application of filter cake. This study consisted of three experiments performed in the State of São Paulo, Brazil, (in Igaraçu do Tiete, on an Oxisol; in Santa Maria da Serra, on an Entisol, both in the 2008/2009 growing season; and in Mirassol, on an Ultisol, in the 2009/2010 growing season) in a randomized block design with four replications with a 8 x 2 factorial combination of micronutrients (1 - no application/control, 2 - addition of Zn, 3 - addition of Cu, 4 - addition of Mn... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zn; Cu; B; Mn; Fe; Mo; Filter cake; Sacharum spp. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300011 |
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| Rossato,Otavio Bagiotto; Ceretta,Carlos Alberto; Silva,Leandro Souza da; Brunetto,Gustavo; Adorna,Jaqueline Cristiane; Girotto,Eduardo; Lorenzi,Cledimar Rogério. |
| In Rio Grande do Sul State (RS), Southern Brazil, aluminum saturation in many areas under no-till system is high and base saturation low in the 0.10-0.20 m layer (subsurface), which may reduce the grain yield of annual crops. The objective of this study was to evaluate if the occurrence of high aluminum saturation and low base saturation in the subsurface, under a no-till system, represents a restrictive environment for crop production, as well as to evaluate forms of lime incorporation for soil acidity correction in the subsurface. For this purpose, an experiment was carried out with soybean (2005/2006), corn (2006/2007), wheat (2007) and soybean (2007/2008) crops, in a Rhodic Hapludox (USDA, 1999) with sandy loam texture, under no-till for four years in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lime; Soil tillage systems; Aluminum saturation; Base saturation. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000300018 |
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