Soil physical properties modified by the action of different rice (Oryza sativa L.) growing managements
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Abstract
2003, with the objective of determining the effect of three
different cropping systems on soil particle, bulk density, total
soil porosity and rice yield. The factors evaluated were years
of study and cropping systems: 1. �??rice-rice�?� monoculture,
two sowings were performed every year in the same soil area;
2. �??rice-fallow-cattle-rice�?� annual rotation, sowing was done
in the rainy season every year of the study, then a short fallow
after harvest, later on cattle grazing followed by a new sowing;
3. �??rice-soybean�?� annual rotation, rice was sown in the rainy
season, then soybean and later on rice crop. Rice monoculture
and cattle grazing deteriorated soil physical properties, whereas
the annual rice-soybean rotation modified them just a little
after three years. Also, agricultural yield was strongly affected
where soil physical properties were degraded in a short time.
The best measurements of soil bulk density and total porosity
for rice production are between 1.12-1.20 Mg.m-3 and 54-57 %
respectively.
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