22 results

Simulation of organic matter dynamics in an Argisol under mineral and organic fertilization with the century model

L. F. C. Leite, E. S. Mendonça, P. L. O. A. Machado

01/Apr/2004

Simulation models are essential instruments to understand soil organic matter dynamics and the turnover of its pools in tropical soils. The objectives of this study were: (a) simulate the effects of maize production systems under organic and mineral fertilization on soil organic matter dynamics of an Ultisol using the Century model; (b) to compare total carbon (TOC) and total nitrogen stocks (TN) and the carbon pools (C) measured in the laboratory and estimated by the Century model for the surface […]

Soil properties and root system after four years of direct drilling of winter growing forage on a native grassfield dissected with herbicides

E. Pérez Gomar, J. M. Reichert, D. J. Reinert, F. García

01/Mar/2002

Natural grassfields developed on sandy soils from Northern Uruguay are formed by communities of forage species, composed mainly of seasonal growing grasses, with low biomass production during the fall/winter period. The objective of this study was to evaluate the effect of herbicides, applied on native grassfield to established winter forage species, on soil properties and root biomass. This experiment began in 1994 and was established as a complete block design, with three replications. In the main plots, to establish winter-growing […]

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