Changes in topsoil bulk density after grazing crop residues under no - till farming
The grazing of crop residues during the winter in integrated crop–livestock systems can either increase soil bulk density (BD) by compaction or decrease BD by swelling, as a function of gravimetric soil water content (GW) during grazing. A field experiment was conducted from 2005 to 2008 to evaluate...
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| 022 | |a 0016-7061 | ||
| 024 | |a 10.1016/j.geoderma.2010.06.010 | ||
| 040 | |a AR-BaUFA |c AR-BaUFA | ||
| 245 | 1 | |a Changes in topsoil bulk density after grazing crop residues under no - till farming | |
| 520 | |a The grazing of crop residues during the winter in integrated crop–livestock systems can either increase soil bulk density (BD) by compaction or decrease BD by swelling, as a function of gravimetric soil water content (GW) during grazing. A field experiment was conducted from 2005 to 2008 to evaluate the BD response to grazing in a no-till silty loam soil (Typic Argiudoll) of the Pampas region of Argentina. Soil BD (core method), GW data and the calculated air volume (AV) were obtained from the 0–50 mm and 50–100 mm layers at different sampling times from ungrazed and grazed treatments. Over most of the study period (2006 through 2008) soil BD showed little impact from grazing, with minimal temporal variation (1.32–1.46 Mg m−3). This stable behavior was ascribed to low rainfall and relatively low GW values at the time when soil was trampled by livestock and routinely trafficked by machinery. Soil BD in the upper (0–50 mm) layer was significantly (pb0.001) lower at the beginning of the study (2005 to early 2006), when the rainfall was higher (as was soil GW) during transit periods. Lower BD was not due to soil swelling but to air that was trapped by kneading in response to transit of livestock and machinery. Fitted straight lines indicated that this process became particularly prominent when GW was N330 g kg−1 in the ungrazed treatment and GW was N240 g kg−1 in the grazed treatments. Grazing accentuated the soil kneading process that promoted air entrapment. Our results suggest in this no-tilled silt loam soil that winter grazing of crop residues caused no deterioration of topsoil porosity in the no-tilled silty loam soil. | ||
| 653 | |a SOIL SWELLING | ||
| 653 | |a VOLUMETRIC ANALYSIS | ||
| 653 | |a WATER REGIMES | ||
| 653 | |a SOIL DYNAMICS | ||
| 700 | 1 | |9 33912 |a Fernández, Patricia Lilia |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina. | |
| 700 | 1 | |9 7471 |a Alvarez, Carina Rosa |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina. | |
| 700 | 1 | |9 6444 |a Schindler, Valeria |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Animal. Cátedra de Mejoramiento Genético Animal. Buenos Aires, Argentina. | |
| 700 | 1 | |9 9839 |a Taboada, Miguel Angel |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Ingeniería Agrícola y Uso de la Tierra. Cátedra de Fertilidad y Fertilizantes. Buenos Aires, Argentina. |u Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Suelos Castelar. Hurlingham, Buenos Aires, Argentina. |u CONICET. Buenos Aires, Argentina. | |
| 773 | 0 | |t Geoderma |g vol.159, no.1-2 (2010), p.24-30, grafs. |w (AR-BaUFA)SECS000095 | |
| 856 | |f 2010fernandez3 |i En Reservorio: |q application/pdf |u http://ri.agro.uba.ar/files/intranet/articulo/2010fernandez3.pdf |x ARTI201911 | ||
| 856 | |u https://www.elsevier.com |z LINK AL EDITOR | ||
| 942 | |c ARTICULO | ||
| 942 | |c ENLINEA | ||
| 976 | |a AAG | ||