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Now showing items 41-50 of 50
The measurement of symbiotic nitrogen fixation in established pastures and some aspects of the nitrogen cycle in a sequence of pastures of increasing age
(Lincoln College, University of Canterbury, 1976)
The acetylene reduction (A.R.) assay was investigated for quantitative measurement of symbiotic nitrogen fixation in established legume-based pastures, under field conditions.
It was found that the rate of ethylene ...
Chemical and mineralogical properties of a sequence of terrace soils near Reefton, New Zealand
(Lincoln College, University of Canterbury, 1975)
Changes brought about by chemical and physical weathering were investigated in a chronosequence of terrace soils near Reefton, New Zealand. The parent materials of the soil, which ranged in age from about 1000 to over ...
Molecular weight distribution and chemical nature of organic matter in soil chronosequences
(Lincoln College, University of Canterbury, 1978)
A method of extracting a reasonable amount of organic carbon from the soil with minimum damage to the soil organic matter during extraction and purification was developed. This rapid extraction method was a modification ...
Nitrogen fixation by Ulex europaeus (gorse) and Cytisus scoparius (broom)
(Lincoln College, University of Canterbury, 1973)
A series of glasshouse and laboratory experiments was carried out to enable comparison of two woody perennial legumes, gorse and broom, with other legumes, nodulated non-legumes and other biological nitrogen fixing ...
Density and irrigation studies in Lupinus albus and L. angustifolius
(Lincoln College, University of Canterbury, 1977)
Interest in sweet lupins as a possible source of high quality protein prompted the studies reported in this thesis. At the time of the inception of these studies several scientific groups in Australia and New Zealand were ...
Nitrogen nutrition of mycorrhizal pines
(Lincoln College, University of Canterbury, 1972)
Nitrogen has been central to many of these speculations regarding the function of mycorrhizas in tree nutrition and growth. Historically it was felt that mycorrhizas were more efficient in absorbing nitrogen from humus ...
The influence of gamma irradiation on dry seeds of lucerne, cv. Wairau
(Lincoln College, University of Canterbury, 1974)
Lucerne (Medioago sativa L. 2n=32) is one of the chief forage crop plants and has an increasing importance in the New Zealand farming system.
The natural variability in lucerne is considerable. This is mainly because ...
Ecology of Coleophora spissicornis (Haworth) and C. frischella (Linnaeus) associated with Trifolium repens Linnaeus in Canterbury, New Zealand
(Lincoln College, University of Canterbury, 1975)
This thesis reports the first comprehensive ecological study on a population of Coleophora spissicornis and C. frischella infesting Trifolium repens. The study was conducted at Lincoln, New Zealand during the summer seasons ...
An investigation into the absence of sulphur and phosphorus responses in the dryland lucerne at Ashley Dene : a dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science (Honours) in the University of Canterbury [Lincoln College]
(Lincoln College, University of Canterbury, 1977)
In recent years, attention has been focussed on the
efficient use of fertilisers in New Zealand. Superphosphate
has become an expensive farm item as a result
of continuing demand and higher production costs.
In terms ...
Components of grain yield in wheat : a thesis submitted for the degree of Doctor of Philosophy in the University of Canterbury [Lincoln College], New Zealand
(Lincoln College, University of Canterbury, 1977)
Between 1972 and 1976 a series of field experiments were conducted to investigate the factors limiting grain yield in
wheat (Triticum aestivum L). Spike population restricted yield
when it was below about 500 spikes/m² ...