Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts

Urea, when surface-applied to soils often resulted in high losses due to volatilisation of ammonia. This study was undertaken to measure ammonia volatilisation loss from urea on two soils under field conditions and to study the effect of urease inhibitors and soluble salts on ammonia volatilisat...

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Main Author:	Pancras, Helen
Format:	Thesis
Language:	English English
Published:	1991
Subjects:	Ammonia
Online Access:	http://psasir.upm.edu.my/id/eprint/10291/1/FP_1991_4_A.pdf
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id	my-upm-ir.10291
record_format	uketd_dc
spelling	my-upm-ir.102912011-03-21T04:43:21Z Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts 1991 Pancras, Helen Urea, when surface-applied to soils often resulted in high losses due to volatilisation of ammonia. This study was undertaken to measure ammonia volatilisation loss from urea on two soils under field conditions and to study the effect of urease inhibitors and soluble salts on ammonia volatilisation loss from urea. The N- 15 recovery technique was employed because it posed no disturbance to the field micro-environment. Experimental evidence showed that other pathways of nitrogen loss such as denitrification did not occur during the period of the experiment. Leaching losses were taken into account by sampling deeper in the soil profile until no further fertilizer nitrogen was recovered. There fore any N-15 lost from the soil profile was due to ammonia volatilisation process alone. Ammonia volatilisation loss was calculated by taking the. difference between the added and the recovered N-15. Ammonia 1991 Thesis http://psasir.upm.edu.my/id/eprint/10291/ http://psasir.upm.edu.my/id/eprint/10291/1/FP_1991_4_A.pdf application/pdf en public masters Universiti Pertanian Malaysia Ammonia Faculty of Agriculture English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Ammonia
spellingShingle	Ammonia Pancras, Helen Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts
description	Urea, when surface-applied to soils often resulted in high losses due to volatilisation of ammonia. This study was undertaken to measure ammonia volatilisation loss from urea on two soils under field conditions and to study the effect of urease inhibitors and soluble salts on ammonia volatilisation loss from urea. The N- 15 recovery technique was employed because it posed no disturbance to the field micro-environment. Experimental evidence showed that other pathways of nitrogen loss such as denitrification did not occur during the period of the experiment. Leaching losses were taken into account by sampling deeper in the soil profile until no further fertilizer nitrogen was recovered. There fore any N-15 lost from the soil profile was due to ammonia volatilisation process alone. Ammonia volatilisation loss was calculated by taking the. difference between the added and the recovered N-15.
format	Thesis
qualification_level	Master's degree
author	Pancras, Helen
author_facet	Pancras, Helen
author_sort	Pancras, Helen
title	Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts
title_short	Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts
title_full	Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts
title_fullStr	Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts
title_full_unstemmed	Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts
title_sort	field evaluation of ammonia volatilisation loss from urea and its control using urease inhibitors and soluble salts
granting_institution	Universiti Pertanian Malaysia
granting_department	Faculty of Agriculture
publishDate	1991
url	http://psasir.upm.edu.my/id/eprint/10291/1/FP_1991_4_A.pdf
_version_	1747811089092968448

Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts

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