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| Registros recuperados: 490 | |
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| Carvalho,Daniel F. de; Eduardo,Eliete N.; Almeida,Wilk S. de; Santos,Lucas A. F.; Alves Sobrinho,Teodorico. |
| ABSTRACTThis study evaluated soil and water losses, soil water infiltration and infiltration rate models in soil tillage systems and corn (Zea mays, L.) development stages under simulated rainfall. The treatments were: cultivation along contour lines, cultivation down the slope and exposed soil. Soil losses and infiltration in each treatment were quantified for rains applied using a portable simulator, at 0, 30, 60 and 75 days after planting. Infiltration rates were estimated using the models of Kostiakov-Lewis, Horton and Philip. Based on the obtained results, the combination of effects between soil tillage system and corn development stages reduces soil and water losses. The contour tillage system promoted improvements in soil physical properties,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil loss; Infiltration rate; Soil tillage; Rainfall simulator. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662015001101072 |
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| Vázquez,Eva Vidal; Bertol,Ildegardis; Siqueira,Glécio Machado; Paz-Ferreiro,Jorge; Dafonte,Jorge Dafonte. |
| The objective of this work was to investigate the decay of initial surface roughness induced by simulated rainfall under different soil residue cover and to compare classical statistical indices with geostatistical parameters. A conventionally tilled loamy soil with low structure stability, thus prone to crusting was placed at 1 m² microplots. Each microplot received three successive rainfall events which bring about cumulative 25 mm, 50 mm and 75 mm at 65 mm h-1 intensity. Five treatments without replication were tested with different corn straw quantities (0, 1, 2, 3 and 4 Mg ha"1). Soil surface microrelief was measured at the initial stage and after each simulated rainfall event. Five treatments and four surface stages were monitored, resulting in 20... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil tillage; Roughness index; Surface microrelief; Simulated rain. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500015 |
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| Lange,Denise; Fernandes,Wedson Desidério; Raizer,Josué; Faccenda,Odival. |
| This study had the objective of assessing the differences in foraging activity of the predacious ants between two areas, one conventional and other with no-till agriculture systems. The research was conducted in two contiguous 1.5 ha plots in Dourados MS, Brazil, from February 2001 to December 2003. Each plot received 750 baits (Nasutitermes termites), 425 at daylight and 325 at night. The termites were placed on the filter paper, on the ground, and ant attack was monitored for 15 min, until removed. Sixteen ant species were found in the no-till system and nine in the conventional system. Baits removed from no-till were significantly higher than the conventional plots and were influenced by the sampling time, at day or night. The seasons of the year did... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agroecosystems; Biological control; Community structure; Soil tillage; Species richness; Predation effects. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600015 |
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| Registros recuperados: 490 | |
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