[none]

Evidence is presented that the cycling of nutrients in Pinus radiata plantations on a pumice soil will retard serious depiction of nutrients at least until the end of the second crop.
Of the quantities of nitrogen, phosphorus, potassium and calcium taken up from a pumice soil by P. radiata forest, at least 85% is returned to the soil as litter and wash from the tree crowns in rain, and as slash from thinnings, prunings and clear felling. This slash returns more nitrogen, phosphorus and potassium to the soil than is removed in logs.

[First paragraphs...]

[Book details]
On aggression. Konrad Lorenz. Methuen and Co. Ltd., London. Price in U.K.: 30 shillings

[Book details]
The pattern of animal communities. Charles S. Elton. Methuen & Co. Ltd., London. Price in U.K. 90 shillings

[First paragraphs...]
The breeding biology of Lophortyx californicus in North America has been described by Sumner (1935). Glading (1938), Howard and Emlen (1942), Genelly (1955), Raitt (1960) and Lewin ( 1963); in the Hawaiian Islands by Schwartz and Schwartz (1949) and in New Zealand by Williams (1952, 1959).

[First paragraphs...]
Takahe were once widely distributed—the type specimen being sub-fossil and from Taranaki in the North Island. During recent centuries the size and range of the population has shrunk and only four living specimens, all from Fiordland, were recorded between 1849 and 1898 (Williams, 1960). There followed a gap of 50 years and the species was considered extinct. Then, in November 1948, takahe were rediscovered in the neighbouring Point Burn and Tunnel Burn Valleys of the Murchison Mountains, Fiordland (Orbell, 1949).

This report forms part of a study of indigenous grasslands of Otago using continuum analysis. An attempt has been made to relate variation in grassland and related vegetation to the principal environmental gradients.

The number of hares (Lepus europaeus) and their diet above the tree line in a 3100-acre basin at 4000-6000 ft. were assessed by tracking in snow, observing from a hide, and counting and analysing faecal pellets. About 8 hares lived on 300 acres of north-facing slopes, feeding chiefly on Chionochloa tussock and shrubs in winter and Poa colenso, in summer. These are dominant species of the grassland and hares are causing little damage relative to the 40-60 deer (Cervus elaphus) and chamois (Rupicapra rupicapra) present.

Four brachypterous grasshoppers, Paprides nitidus, Brachaspis collinus, B. nivalis and Sigaus villosus, occur above timber-line at Cupola Basin, a 3,000 acre tributary catchment of the Travers River, Nelson. Samples collected between January 1965 and April 1966 were measured to obtain information on population structure, overwintering and reproductive biology, and correlation between weight and length. Data for Brachaspis females are analysed and presented in this paper to illustrate the general bionomics. Population densities were calculated on plots of about 100 sq.

[First paragraph...]
Experiments are being carried out on the Craigieburn Range (in Canterbury, New Zealand) with mountain beech (Nothofagus solandri var. cliffortioides), which is the local timber line species, and with timber line species from other parts of the world. The aims are to compare growth at different altitudes, to demonstrate symptoms of failure in seedlings set out above their natural limit, and to show whether timber lines in New Zealand are climatically equivalent to those in other lands.