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Formas do relevo e variabilidade espacial de atributos químicos e mineralógicos de um argissolo cultivado com cana-de-açúcar
| Content Provider | Semantic Scholar |
|---|---|
| Author | Barbieri, Diogo Mazza |
| Copyright Year | 2007 |
| Abstract | Precision agriculture implies on the analysis of the spatial variability of the production factors and the application of inputs in a localized way and on precise doses. The present work aimed to analyze the influence of the relief on the spatial variability of the chemical and mineralogical attributes for the application of inputs in variable rates. Two parcels of one hectare were bounded in concave and convex area. 121 samples were taken from each area. The levels of available P have shown to be different on the two studied areas, being the lowest mean values of P on the convex area, where the highest levels of gibbsite are present. The formation of the minerals from the clay fraction is conditioned by the relief variations, being that the convex area has presented a more favorable environment for the formation of gibbsite than the concave area, showing that relief may be used for the definition of limits in more homogenous areas. Gibbsite was the determinant factor for the higher capacity of P maximum adsorption and lower availability of phosphorous on the convex area. The use of the geostatistics technique has made possible the precise description of the soil properties. Key-words: Precision agriculture, P adsorption, chemical management of the soil, gibbsite. CAPITULO 1 – CONSIDERACOES GERAIS |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.fcav.unesp.br/download/pgtrabs/pv/m/2961.pdf |
| Alternate Webpage(s) | https://repositorio.unesp.br/bitstream/handle/11449/96884/barbieri_dm_me_jabo.pdf;sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
