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This study aimed to evaluate at an exploratory level, some of the different conventional sampling designs in a section of a potato crop and in a commercial crop of spinach. Weeds were sampled in a 16 x 48 m section of a potato crop with a set grid of 192 sections. The cover and density of the weeds were registered in squares of from 0.25 to 64 m2. The results were used to create a database that allowed for the simulation of different sampling designs: variables and square size. A second sampling was carried out with these results in a spinach crop of 1.16 ha with a set grid of 6 x 6 m cells, evaluating the cover in 4 m2 squares. Another database was created with this information, which was used to simulate other sampling designs such as distribution and quantity of sampling squares. According to the obtained results, a good method for approximating the quantity of squares for diverse samples is 10-12 squares 4 m2 for richness per ha and 18 or more squares for abundance per hectare. This square size is optimal since it allows for a sampling of more area without losing sight of low-profile species, with the cover variable best representing the abundance of the weeds.

Tipo de documento: Artículo - Article

Información adicional: © Facultad de Agronomía, Universidad Nacional de Colombia Se autoriza la reproducción y citación del material que aparece en la revista, siempre y cuando se indique de manera explícita: nombre de la revista, nombre del autores, año, volumen, número y páginas del artículo fuente. Las ideas y afirmaciones consignadas por los autores están bajo su responsabilidad y no interpretan necesariamente las opiniones y políticas de la Universidad Nacional de Colombia. La mención de productos o firmas comerciales en la revista no implica una recomendación o apoyo por parte de la Universidad ni de la Facultad; el uso de tales productos debe ceñirse a las recomendaciones de las etiquetas.

Palabras clave: agronomia, proteccion de cultivos, vegetables, weed science, crop weed competition, cover, abundance, density., malezas, papa, espinaca





Source: http://www.bdigital.unal.edu.co


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Evaluation of various conventional methods for sampling weeds in potato and spinach crops Evaluación de diferentes metodologías convencionales de muestreo de malezas en cultivos de papa y espinaca David Jamaica1 and Guido Plaza2 ABSTRACT RESUMEN This study aimed to evaluate (at an exploratory level), some of the different conventional sampling designs in a section of a potato crop and in a commercial crop of spinach.
Weeds were sampled in a 16 x 48 m section of a potato crop with a set grid of 192 sections.
The cover and density of the weeds were registered in squares of from 0.25 to 64 m2.
The results were used to create a database that allowed for the simulation of different sampling designs: variables and square size.
A second sampling was carried out with these results in a spinach crop of 1.16 ha with a set grid of 6 x 6 m cells, evaluating the cover in 4 m2 squares.
Another database was created with this information, which was used to simulate other sampling designs such as distribution and quantity of sampling squares.
According to the obtained results, a good method for approximating the quantity of squares for diverse samples is 10-12 squares (4 m2) for richness per ha and 18 or more squares for abundance per hectare.
This square size is optimal since it allows for a sampling of more area without losing sight of low-profile species, with the cover variable best representing the abundance of the weeds. Este estudio tuvo como objetivo evaluar (a un nivel exploratorio), algunos de los diferentes diseños de muestreo convencionales en una sección de un cultivo de la papa, y en un cultivo comercial de espinacas.
Se realizó un muestreo de malezas en una sección de 16 x 48 m de un cultivo de papa, en red rígida de 192 secciones, en las que se registró la cobertura y la densidad de malezas, en tamaños de cuadro desde 0,25 m2, hasta 64 m2, con esta información se conformó una base de datos que permitió simular diversos diseños de muestreo como: varia...






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