R. H. Marrs
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Factors influencing the weed flora in the Gezira Scheme, Sudan Open
Summary Agriculture plays a major role in the economic and social development of Sudan. The most important agricultural area in Sudan is the irrigated Gezira Agricultural Scheme (GAS), which takes water from the Sennar Dam on the Blue Nile…
Control of <i>Molinia caerulea</i> on upland moors Open
Summary Molinia encroachment has been viewed as a major threat to moorland conservation in the UK and elsewhere in Europe. In England and Wales agri‐environment schemes are in place that aim to reduce Molinia caerulea and encourage the dev…
The Ecology of Bracken: Its Role in Succession and Implications for Control Open
Bracken (Pteridium) holds a pivotal role in succession, usually occurring in sequence between plagio-climax communities such as heathland and woodland. It is at this interface that bracken causes problems for man, as the subseral communiti…
Interspecific Variations of Nuclear DNA Content and Karyotype Diversity in Ferocactus. Open
Karyotype analysis, determination of somatic chromosome number, total chromosome length and volume, cytophotometric estimation of 4C DNA content and Interphase Nuclear Volume (INV) were carried out in 6 species of Ferocactus of the family …
Control of bracken and restoration of heathland. VII. The response of bracken rhizomes to 18 years of continued bracken control or 6 years of control followed by recovery Open
1. The effects of six bracken control treatments applied in combination with a Calluna* seeding treatment on the rhizome system of bracken Pteridium aquilinum at Cavenham Heath in Breckland was assessed after 18 years. Bracken control incl…
Long-term studies of vegetation change at Moor House NNR: guide to recording methods and the database Open
This report briefly reviews the history of the long-term studies of \nvegetation change at Moor House NNR, and describes 10 experiments which are \nbeing monitored on a regular basis. Detailed methods for sampling the vegetation, and a gui…