Results 31 to 40 of about 1,817 (164)

Dominance of Ricinus communis in the Semi‐Arid Region Mediated by Allelopathy

Weed Research, Volume 66, Issue 2, March/April 2026.
ABSTRACT The introduction of invasive alien species can adversely affect the functioning of natural ecosystems. Ricinus communis L., widely present in the Brazilian semi‐arid region, establishes itself in areas with native species, such as Handroanthus impetiginosus (Mart.
Bruno M. Alcântara, Felipe R. Santos, José Anderson S. Silva, José W. Almeida‐Bezerra, José Galberto M. Costa, Delmira C. Silva, Cláudia M. Furlan, Maria Arlene P. Silva   +7 more
wiley   +1 more source

Efecto de la longitud del esqueje sobre la propagación asexual de tacaco (Sechium tacaco; Cucurbitaceae)

Cuadernos de investigación UNED
Introducción: Existe poca información sobre la propagación vegetativa de tacaco (Sechium tacaco). Objetivo: Evaluar el efecto de la longitud del esqueje sobre la propagación asexual de tacaco.
José Eladio Monge-Pérez, Karen María Muñoz-López, Michelle Loría-Coto   +2 more
doaj   +1 more source

Densidad de siembra del girasol forrajero

Agronomía Costarricense, 2008
Con el objetivo de promover el girasol como un cultivo forrajero, se evaluó el efecto de 4 densidades de siembra (75.000, 100.000, 125.000 y 150.000 plantas.ha-1) en el rendimiento de forraje para consumo de ganado.
Luis Enrique Escalante-Estrada, Yolanda Isabel Escalante-Estrada, Carmen Linzaga-Elizalde   +2 more
doaj  

Relaciones entre el área foliar, cobertura, peso fresco y seco en verdolaga (Portulaca oleracea)

Brazilian Journal of Animal and Environmental Research
  The purslane (Portulaca oleracea L.) in Mexico appears in agricultural fields as weeds, where it is collected and used as food for its nutritional and medicinal properties. The production of fresh (yield) and dry matter of P. oleracea may be a function of the leaf area and its coverage. To determine the degree of relationship between these variables
José Alberto Salvador Escalante Estrada, Yolanda Isabel Escalante Estrada, Eleazar Cortés Rosales   +2 more
openaire   +1 more source

MODELOS DE REGRESIÓN PARA LA ESTIMACIÓN DEL PESO FRESCO Y SECO DE RAMAS DE DURAZNERO (Prunus persica L. Batsch.)

Revista Chapingo Serie Horticultura, 1998
In studies of the growth of plants the destruction of the organ is required to evaluate some variables, such as fresh weight (FW) and, more important, dry weight (DW). With fruit trees, like the peach tree, this procedure implies a hard and expensive work, besides the elimination of many valuable trees, considering the abundant replications that must ...
J.R. Espinoza-Espinoza, J. Ortiz-Cereceres, Ma. del C. Mendoza-Castillo, J.A. Villaseñor-Alva, A. Villegas-Monter, C. Peña-Valdivia, G. Almaguer-Vargas   +6 more
openaire   +1 more source

Caatinga diaspores: Descriptive overview of dispersal units of seasonally dry tropical forests and woodlands

Ecology, Volume 106, Issue 2, February 2025.
Abstract Dispersal unit characteristics provide crucial insights into species ecology and are essential for the conservation and restoration of ecosystems. The Caatinga, the largest ecosystem of seasonally dry tropical forests and woodlands in South America, remains underrepresented in terms of dispersal unit data, which are often scattered across the ...
Fabricio Francisco Santos da Silva, Edjane Silva Damasceno, Ramon Athayde de Souza Cavalcante, Francinete Alves do Nascimento, Mateus Brandão Prates, Luís Francisco Mello Coelho, Daniel Salgado Pifano, Renato Garcia Rodrigues   +7 more
wiley   +1 more source

Acondicionamiento de becerros previo a la recría bajo pastoreo en trópico seco: efectos sobre el peso corporal y la condición sanitaria

Revista Mexicana de Ciencias Pecuarias, 2017
Se realizaron tres experimentos (2 en época seca y 1 en época de lluvias) utilizando 96 becerros (Simmental X Cebú) para evaluar el efecto del acondicionamiento realizado durante 112 días (del día 28 predestete al día 84 posdestete). En cuatro períodos de 28 días cada uno, se evaluó peso y condición corporal de los animales, nitrógeno ureico (NU) y ...
Guarneros Altamirano, Rafael, Gutiérrez Ornelas, Erasmo, Bernal Barragán, Hugo, Avalos Ramírez, Ramiro, Castillo Gallegos, Epigmenio, Olivares Sáenz, Emilio   +5 more
openaire   +4 more sources

La sombra alargada del patrón: Gamonalismo y hábitos hacendatarios en Chimborazo tras la reforma agraria

The Journal of Latin American and Caribbean Anthropology, Volume 29, Issue 4, Page 352-363, December 2024.
Abstract This paper explores selective aspects of the historical processes of organization of the kichwa peasantry in the Andes of Ecuador. Based on the analysis of two representative cases of confrontation between peasants and landowners over access to land in the province of Chimborazo, it discusses the relevance of the concept of “gamonalismo” as ...
Víctor Bretón
wiley   +1 more source

Selección de cepas nativas de Rhizobium leguminosarum bv phaseoli eficientes en fijación biológica de nitrógeno en suelos de Costa Rica.

Agronomía Mesoamericana, 2016
Se aislaron 131 cepas de R. leguminosarum bv phaseoli de diferentes zonas frijoleras de Costa Rica. Se evaluaron a nivel de invernadero la respuesta a la inoculación de Phaseolus vulgaris var. Negro Huasteco con estas cepas.
Floribeth Mora
doaj   +1 more source

Differential responses of community‐level functional traits to mid‐ and late‐season experimental drought in a temperate grassland

Journal of Ecology, Volume 112, Issue 10, Page 2292-2306, October 2024.
These findings suggest that functional trait composition of grassland communities may shift under climate change‐induced drought, depending on the growing season timings. Trait‐based attempts to predict ecosystem functioning must account for such temporal variation in community trait values.
E. Fenollosa, P. Fernandes, A. Hector, H. King, C. S. Lawson, J. Jackson, R. Salguero‐Gómez   +6 more
wiley   +1 more source