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| Silva,Laércio S.; Galindo,Izabel C. de L.; Gomes,Romário P.; Campos,Milton C. C.; Souza,Edivan R. de; Cunha,José M. da. |
| ABSTRACT Inadequate and intensive management of soils can promote changes in their chemical attributes and impair the quality of surface and groundwater, especially in hillside areas. Therefore, the aim of this study was to identify possible changes in soil and water chemical composition of hillside areas cultivated with horticulture. For this, chemical attributes of three soil depths (0-10, 10-30, and 30-60 cm) were determined in three hillside positions (upper, middle, and lower thirds) of five hillside and adjacent forest areas, as well as water from reservoirs for agricultural use and human consumption. Compared with the forest area, horticultural areas present soil with lower organic matter content and CEC, but higher values of pH, base saturation,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Landscape; Environmental contamination; Management practices; Irrigation water. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300351 |
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| Campos,Milton C. C.; Marques Júnior,José; Pereira,Gener T.; Souza,Zigomar M. de; Montanari,Rafael. |
| A posição de importância ocupada pela cana-de-açúcar (Saccharum officinarum) no agronegócio brasileiro justifica o uso de técnicas que propiciem a implantação de um sistema avançado de cultivo, a partir do conhecimento da variabilidade espacial dos atributos do solo. O objetivo deste trabalho foi realizar o planejamento agrícola e a implantação de um sistema de cultivo da gramínea, com o auxílio de técnicas geoestatísticas, na região de Pereira Barreto, SP. Para o mapeamento de uma área de 505 ha utilizando-se equipamento de sistema de posicionamento global (GPS) elaborou-se, em seguida, o Modelo Digital de Elevação (MDE); depois coletaram-se amostras de solo na profundidade de 0-0,25 m, a cada 7 ha, para caracterização química e granulométrica. Os... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atributos do solo; Zonas de manejo específico; Krigagem. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000300011 |
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| Silva,Luiz C. da; Lucchesi,Luiz A. C.; Koehler,Henrique S.; Campos,Milton C. C.. |
| This study aimed to evaluate the extractable phosphorus Mehlich-1 in a distrophic Red-Yellow Latosol (Oxisol) which received alkaline sewage sludge (alkaline biosolid) along with 0, 0.436, 0.872 and 1.745 dag kg-1 of P from three different sources and cultivated with common bean (Phaseolus vulgaris cv. IPR Uirapuru) in greenhouse. It also aimed to quantify the phosphorus uptake by the plant, plant production and the relative agronomic effectiveness index. For the establishment of the treatment the recommended dose was 45.85 kg ha-1 of P from the treatments, except the control (0 dag kg-1 of P). This dose was calculated for 2.5 kg of this Oxisol from Contenda, Paraná State, Brazil, contained in recepients of 3 dm3 with 6 cultivated bean plants (cv. IPR... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phosphorus; Dose; Grains; Dry mass; Phaseolus vulgaris. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012001200001 |
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