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Nitrogen, Salinity, and Acidity Distribution in an Irrigated Orchard Soil as Affected by Placement of Nitrogen Fertilizers
Author(s) -
Felizardo B. C.,
Benson N. R.,
Cheng H. H.
Publication year - 1972
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1972.03615995003600050032x
Subject(s) - orchard , salinity , nitrogen , ammonium , agronomy , soil salinity , nitrate , soil water , environmental science , soil horizon , chemistry , soil science , biology , ecology , organic chemistry
A field experiment was conducted to determine the vertical and lateral changes in the distribution of nitrogen, salinity, and acidity occurring in an irrigated orchard soil following addition of (NH 4 ) 2 SO 4 , NH 4 NO 3 , or Ca(NO 3 ) 2 by broadcast, in broad band, or in narrow band. The NH 4 and NO 3 contents in soil decreased rapidly even under narrow band placements. Considerable nitrate movement was observed. After 1 year, neither the total nor the inorganic N level in the fertilized plots was significantly different from that of the control. High salinity was detected under the narrow band placements, but the level diminished rapidly with time. Little salinity was evident under the broad band or broadcast placements. However, the acidity produced by the ammonium fertilizers persisted after 1 year. Changes in soil properties under narrow bands were drastic, whereas changes under broad bands were insignificant.