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Estimates for various components of above-ground biomass are presented for naturally regenerated stands of Pseudotsuga menziesii, 22, 30, 42 and 73 ye...

Extracts of the roots of Hyparrhenia filipéndula and other grasses were tested against soil enrichment cultures of NH₃-and NO₂ oxidizers, by measuring...

An outline balance sheet for water, Na, K, Ca, P and N was constructed for a stream catchment of 83 ha. The catchment surface comprised 11-20% eroding...

Reports a study in which four unmanaged, even-aged stands of second-growth mixed hardwoods 67-97 years old, dominated by Quercus spp., near Asheville,...

Gives results of measurements of the light reflectance of the bark, the type of stem-epiphyte cover, and the lichen flora of samples of trees of Oak (...

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...