Respiration and microbial growth in a New Zealand grassland soil

Robinson, J. B. D.; Macdonald, Geraldine

doi:10.1080/00288233.1964.10416384

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…The overall nitrification and nitrogen mineralisation eJfects of liming which are inferred from Tables 2 and 3 are in keeping with earlier field and laboratory studies of this soil by O'Connor et al (1962). Robinson (1963), and Robinson and Macdonald (1964).…”

Section: Phasementioning

confidence: 99%

Response of four species of chionochloa and two introduced grasses to soil amendment

O'Connor

Connor²,

Molloy³

1972

New Zealand Journal of Botany

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Four species of Chionochloa common in the pastoral sector of the tussock. grasslands of South Island, New Zealand, were found to have diver~ing growth responses to lime and superphosphate when grown in a potted high country yellow-brown earth. The probable reasons for this divergence were considered with respect to nitrogen and phosphorus availability. The responses of these species were related to their pattern of occurrence in natural conditions. The comparative behaviour of two introduced grasses was also studied.

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Section: Phasementioning

confidence: 99%

Response of four species of chionochloa and two introduced grasses to soil amendment

O'Connor

Connor²,

Molloy³

1972

New Zealand Journal of Botany

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“…) showed that nitrogen was mineralised to a greater degree than sulphur. Because the level of respiratory activity in the Craigieburn soil in the unimproVed state is low (Robinson and MacDonald 1964). any effect of cultural practice on mineralisation would probably be small.…”

Section: Influences Of Ground Treatment On Sulphur Availabilitymentioning

confidence: 99%

Responses of grasses to sulphur fertilisers

O'Connor¹,

Vartha²

1969

New Zealand Journal of Agricultural Research

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ABSTRACIExperiments are reported from tussock grassland soils in which different grasses were grown as spaced plants in existing turf, sown in cultivated and uncultivated soil, and grown in pot cultures.Differences are demonstrated among grasses in response to sulphur when nitrogen supply is improved. Cocksfoot and ryegrass showed a response to applied sulphur fertilisers when sown after cultivation, whereas resident grasses, principally sweet vernal and browntop, showed no gain in yield from sulphur after cultivation. Effects of cultivation and herbicide treatment on the availability of sulphur from different sources are also reported.Experiments are reported which indicate that the respo.,se to sulphate by cocksfoot depends on the level of nitrogen uptake. Where sulphate supply was very high relative to available nitrogen. there was little or no improvement in cocksfoot growth. At moderate levels of added nitrogen, treatment with high levels of calcium sulphate frequently resulted in significantly less growth than treatment with lower levels of calcium sulphate. Where nitrogen uptake is increased without improvement in sulphate supply, a large proportion of nitrogen in herbage may be in non-protein form.Results are discussed in relation to the likely trends in pasture composition and fertiliser needs in the course of improvement of grasslands in sulphur-deficient areas.

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