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Observations were made on sugar beet fields in Cambridgeshire and West Suffolk, UK, in April-May 1977 and 1978 from emergence of seedlings until they ...

This article describes how nature conservation should seek to safeguard the native biological diversity for the benefit of people and of wildlife. It ...

The identification of species, communities, or ecosystems that are likely to be strongly damaged by human activities (i.e. that are fragile) forms an ...

The maximum rate of apparent photosynthesis in recently expanded leaves of unshaded Amaranthus edulis plants at 310 ppm. CO₂ and 7500 f.c. was 55 ± 5 ...

It has been suggested that the perennial grasslands of the Serengeti plains have recently been converted to annual grass and shrub-dominated communiti...

Oolitic limestone workings on the Leicestershire/Lincolnshire border were sown in 1981 with Brachypodium sylvaticum and Lotus corniculatus; in a facto...

Changes in the weed flora of Boddington Barn field were monitored during 20 years of arable cropping after being ploughed out of grass in 1960. Seedli...

Agrostemma githago and wheat cv. Sicco were grown in 1981 in monocultures and 1:1 mixtures at total densities of 16, 40, 120, 400 or 1200 seeds/m². A ...

Phleum pratense cv. Vanadis, Saga and Alma were grown with Trifolium pratense in an outdoor pot experiment in replacement series with or without the a...

Populations of P. pratensis and A. tenuis [A. capillaris] were collected from high fertility and low fertility plots of long-term fertilizer experimen...