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dc.contributor.authorMyo Aung, U
dc.date.accessioned2020-10-13T22:50:33Z
dc.date.available2020-10-13T22:50:33Z
dc.date.issued1968
dc.identifier.urihttps://hdl.handle.net/10182/12998
dc.description.abstractA review is made of the literature on the world use and crop response to major fertilizers in general and to nitrogenous fertilizers in particular. The physical and chemical properties of ammonia and its behaviour in soil provide basic information in finding correct method and time of application for different crops and soils. The fertilisers made from ammonia are also included in the study to indicate the use of ammonia as an indirect fertilizer. The placement and loss of ammonia from the surface of the soil is summarized both from the results of laboratory studies and field experiments together with some discussion. The relation between the method of placement and ammonia loss under the various field conditions provides a guide for efficient use of ammonia as a direct fertilizer, but the world wide field experiments are still lacking, since the use of ammonia at present is mainly limited to the U.S.A. Further study in this respect in other countries will be of value. In the sub-surface application of ammonia or ammonia solutions, the equipment plays an important part because it has not only to place ammonia efficiently into the soil but usually also to minimize the soil disturbance behind the applicator. The commercial equipment manufac­tured previously and at the present day are summarized from literature as well as from information given by some manufacturers. If field experiments are conducted with newly developed equipment under as many field conditions as practically possible, the results will be valuable for further improvement in design. In this study the emphasis is on ammonia, its placement and equipment used for sub-surface application, together with a summary of some relevant experimental work overseas. While it may be unwise to transfer, in exact form, the experiences of such work from one country to another, they can form a guide to planning. This study, in anticipating a growing world wide use of ammonia as fertilizer and an increasing interest in its efficient application, seeks to make a review of the important factors.en
dc.format.extentvi, 91 pages
dc.language.isoenen
dc.publisherLincoln College, University of Canterburyen
dc.rights.urihttps://researcharchive.lincoln.ac.nz/page/rights
dc.subjectammonia fertiliseren
dc.subjectcrop productionen
dc.subjectnitrogenous fertiliseren
dc.titleThe use and application of ammonia fertilizer : A dissertation submitted in partial fulfilment of the requirements for the Post Graduate Diploma in Agricultural Science in the University of Canterbury [Lincoln College]en
dc.typeDissertationen
thesis.degree.grantorUniversity of Canterburyen
thesis.degree.levelDiplomaen
thesis.degree.namePostgraduate Diploma Agricultural Scienceen
lu.contributor.unitDepartment of Agricultural Sciencesen
dc.rights.accessRightsDigital thesis can be viewed by current staff and students of Lincoln University only.en
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.subject.anzsrc079902 Fertilisers and Agrochemicals (incl. Application)en


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