Some effects of nitrate and ammonium nitrogen on the mineral composition of pasture grasses : submitted as part fulfilment of the requirements for the degree of M. Agr. Sc. in Soil Science

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dc.contributor.authorBall, Philip Roger
dc.date.accessioned2018-09-11T21:32:14Z
dc.date.available2018-09-11T21:32:14Z
dc.date.issued1966
dc.description.abstractNitrogen is unique among the major plant nutrients derived from soils in that it may be taken up by plants either as an anion or cation. Nitrate and ammonium comprise the pool of assimilable nitrogen, but their proportionate contribution varies considerably under differing climatic and soil conditions. Bear (1950) formulated a general rule for a constant balance between the number of equivalents of cations and anions in the herbage of growing plants. From this it may be suggested that the uptake of cations and anions, other than ammonium and nitrate, will be markedly influenced by changes in the ionic form of nitrogen being absorbed by non-legumes. That uptake of ionic nitrogen normally exceeds that of any other ionic species, supports this suggestion. Experiments undertaken in this investigation were designed to test the validity of the foregoing postulate, using pasture grasses, with a view to establishing whether changes in the nitrogen regime in the field could be of agronomic significance. An eluciĀ­dation of the relationships between the form of mineral nitrogen available and certain physiological processes within the test plants, was also sought. [From Introduction]en_US
dc.identifier.urihttp://hdl.handle.net/10179/13791
dc.language.isoenen_US
dc.publisherMassey Universityen_US
dc.rightsThe Authoren_US
dc.subjectPasturesen_US
dc.subjectFertilizersen_US
dc.subjectEffect nitrates Plantsen_US
dc.titleSome effects of nitrate and ammonium nitrogen on the mineral composition of pasture grasses : submitted as part fulfilment of the requirements for the degree of M. Agr. Sc. in Soil Scienceen_US
dc.typeThesisen_US
massey.contributor.authorBall, Philip Roger
thesis.degree.disciplineSoil Scienceen_US
thesis.degree.grantorMassey Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Agricultural Science (M. Agr. Sc.)en_US
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