the alternative use of non-selective herbicides in different years will reduce the possibility of weeds resistance to herbicide by avoiding the crops constant exposure to herbicide selection pressure. the photoperiod-sensitive genic male sterile (pgms) rice with herbicide resistance will be convenient to the mechanization of hybrid seed production and weed control. in order to develop double he...

An understanding of natural regeneration processes, and the stand structural features that influence those processes, is vital to attaining goals associated with natural regeneration. This paper discusses natural regeneration concepts and the interactions that occur between shrubs and natural regeneration of ponderosa pine. The interactions observed recently in a series of related seedling recr...

Forest community structure may be influenced by seedling density dependence, however, the effect is loosely coupled with population dynamics and diversity in the short term. In the long term the strength of conspecific density dependence may fluctuate over time because of seedling abundance, yet few long-term studies exist. Based on 11 years of seedling census data and tree census data from a 2...

Low seedling quality is a pervasive problem for smallholder forestry in the Philippines. Intervention measures to improve seedling quality are being examined in a research project funded by the Australian Centre for International Agricultural Research. Field trials have been established as part of this ‘seedling enhancement project’ to compare performance on outplanting of Gmelina arborea when ...

The most widespread and damaging fungal disease of the oat plant is crown rust. Resistance to rust pathogen, Puccinia coronata Cda. f. sp. avenae (Pca), at seedling stage Avena sterilis accessions from Polish national genebank was characterised by five North American pathotypes Pca diverse pathogenicity. pathogenicity determined on a series 34 differential lines carrying known resistance genes....