|
|
|
|
|
| CORDEIRO, G. G.; SOARES, J. M.; RICHE, G.. |
| Descricao do perfil do solo, condutividade hidraulica, estudo do lencol freatico, estudo de drenagem na Fazenda Frutivale, analise quimica da agua do lencol e de drenagem, salinidade dos solos, profundidade dos drenos, altura maxima do lencol no ponto medio entre drenos, espacamento entre drenos recomendados para cada area da Fazenda Frutivale. |
| Tipo: Outras publicações técnicas (INFOTECA-E) |
Palavras-chave: Solo; Lençol Freático; Salinidade; Salinity; Soil; Water table. |
| Ano: 1994 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/131824 |
| |
|
| |
|
| |
|
|
| Gubiani,Paulo Ivonir; Müller,Eduardo Augusto; Somavilla,André; Zwirtes,Anderson Luiz; Mulazzani,Rodrigo Pivoto; Marchesan,Enio. |
| ABSTRACT Water and oxygen deficiencies in the soybean crop cultivated on lowland soils are an important topic of research. The objective of this study was to investigate changes in water and oxygen supply and soybean yield caused by soil management in lowland soils. A soybean crop was grown under four soil conditions: no-tillage (NT), chiseling (CH), ridge tillage on no-tillage (NTR), and ridge tillage on chiseling (CHR). Soil bulk density, total porosity, macro- and microporosity, air permeability, and saturated hydraulic conductivity were measured at 0.05, 0.15, 0.25, and 0.35 m depths. Soil volumetric water content was monitored at the same depths every 30 min during the soybean cycle. The transpiration coefficient was calculated from volumetric water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water stress; Oxygen deficiency; Water table. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100414 |
| |
|
|
| Grogan,James; Galvão,Jurandir. |
| Seasonally dry evergreen forests in southeast Pará, Brazil are transitional between taller closed forests of the interior Amazon Basin and woodland savannas (cerrados) of Brazil's south-central plains. We describe abiotic and biotic gradients in this region near the frontier town of Redenção where forest structure and composition grade subtly across barely undulating topography. Annual precipitation averaged 1859 mm between 1995-2001, with nearly zero rainfall during the dry season months of June August. Annual vertical migrations of deep-soil water caused by seasonal rainfall underlie edaphic and floristic differences between high- and low-ground terrain. Low-ground soils are hydromorphic, shaped by perching water tables during the wet season, pale gray,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Babaçu; Big-leaf mahogany; Disturbance; Soil nutrients; Water table. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000400009 |
| |
|
|
| Sobrinho, Oswaldo Palma Lopes; Arriero, Stephanie Soares; Silva, Gerlange Soares da; Sousa, Aline Bezerra de; Pereira, Álvaro Itaúna Schalcher. |
| The hydraulic conductivity of a soil is the main parameter that determines its drainage capacity. However, its determination is of great importance for sizing in agricultural drainage systems. To determine the hydraulic conductivity of the soil in the presence of water table through the Auger-Hole. The experiment was carried out at Embrapa Manioc and Fruticulture (EMBRAPA), located in the municipality of Cruz das Almas-BA. In order to estimate the hydraulic conductivity, several empirical formulas have been proposed, such as Ernst's, which is the model that most closely approximates the soil situation studied. The hydraulic conductivity values for the studied soil obtained by the Auger-Hole method ranged from 0.24821 to 0.28544 m day-1. With an average... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural drainage; Boring hole; Water table. |
| Ano: 2018 |
URL: http://revistas.ufpr.br/biofix/article/view/57959 |
| |
|
|
|
