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| Silva,Adriana L. da; Bruno,Isabeli P.; Reichardt,Klaus; Bacchi,Osny O. S.; Dourado-Neto,Durval; Favarin,José L.; Costa,Flávio M. P. da; Timm,Luis C.. |
| Basic information for a rational soil-water management of the coffee crop is still insufficient, particularly under irrigated conditions. Of great importance for the estimation of water requirements of coffee crops are their root distribuition and evapotranspiration crop coefficients. This study compares soil water extraction by roots of coffee plants of the variety "Catuaí Vermelho" (IAC-44), grown in Piracicaba, SP, Brazil, 3 to 5 years old, with direct measurements of root dry matter, showing a good agreement between both approaches, and confirming that most of the root system is distributed in the top soil layer (0-0.3 m) and that less than 10% of the root system reaches depths greater than 1.0 m. Calculated evapotranspiration crop coefficients are in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Perenial crop; Soil water storage; Water balance. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662009000300006 |
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| Winkler,Antoniony S.; Silva,Jaqueline T. da; Parfitt,José M. B.; Teixeira-Gandra,Claudia F. A.; Conceço,Germani; Timm,Luis C.. |
| ABSTRACT In the lowlands of Rio Grande do Sul, land leveling is mostly carried out with no slope for the purpose of rice production. In this environment, soils with a low hydraulic conductivity are predominant owing to the presence of a practically impermeable B-horizon near the surface. Land leveling leads to soil accommodation resulting in the formation of depressions where water accumulates after heavy rainfalls, subsequently leading to problems with crops implanted in succession to rice, such as soybeans. The objective of this research was to quantify the areas and volumes of water accumulation in soil as a function of the slope of land leveling. Five typical leveled lowland areas were studied as a part of this research. The original areas presented... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lowlands; Surface drainage; Water accumulation; Digital elevation models. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200077 |
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| Timm,Luis C.; Oliveira,Julio C. M. de; Tominaga,Tania T.; Cássaro,Fabio A. M.; Reichardt,Klaus; Bacchi,Osny O. S.. |
| The quantification of soil water balance components was conducted in a sugarcane (Saccharum officinarum L.) field differently managed, as well as a qualitative analysis of the methodologies used for their estimation. The study was conducted in randomized block experiment with four replicates and three treatments: bare soil, mulched soil using trash left on the soil surface after harvest, and soil with burnt trash. The soil was classified as a Rhodic Kandiudalf, locally called 'Terra Roxa Estruturada', the experimental area having a slope of 7.4%. Run-off, soil water fluxes at the lower soil volume limit, and soil water storage changes were not affected by the different soil management practices. Furthermore, it was found that the evaluation of run-off and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water balance; Soil physical properties; Soil management. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662002000100011 |
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