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...
| Main Author: | |
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| Format: | Thesis |
| Language: | English English |
| Published: |
1991
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/10291/1/FP_1991_4_A.pdf |
| _version_ | 1825944745141075968 |
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| author | Pancras, Helen |
| author_facet | Pancras, Helen |
| author_sort | Pancras, Helen |
| collection | UPM |
| 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. |
| first_indexed | 2024-03-06T07:20:45Z |
| format | Thesis |
| id | upm.eprints-10291 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:20:45Z |
| publishDate | 1991 |
| record_format | dspace |
| spelling | upm.eprints-102912011-03-21T04:43:21Z http://psasir.upm.edu.my/id/eprint/10291/ Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts 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. 1991 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/10291/1/FP_1991_4_A.pdf Pancras, Helen (1991) Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts. Masters thesis, Universiti Pertanian Malaysia. Ammonia English |
| spellingShingle | Ammonia Pancras, Helen Field Evaluation of Ammonia Volatilisation Loss from Urea and its Control Using Urease Inhibitors and Soluble Salts |
| title | 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_short | 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 |
| topic | Ammonia |
| url | http://psasir.upm.edu.my/id/eprint/10291/1/FP_1991_4_A.pdf |
| work_keys_str_mv | AT pancrashelen fieldevaluationofammoniavolatilisationlossfromureaanditscontrolusingureaseinhibitorsandsolublesalts |