LONG-TERM COMPARATIVE-STUDY OF SOIL NITRATE TEST, GILAT PLANT INDICATOR METHOD AND WHEAT NITROGEN UPTAKE

Citation
J. Amir et al., LONG-TERM COMPARATIVE-STUDY OF SOIL NITRATE TEST, GILAT PLANT INDICATOR METHOD AND WHEAT NITROGEN UPTAKE, Plant and soil, 158(2), 1994, pp. 223-231
Citations number
25
Categorie Soggetti
Agriculture Soil Science","Plant Sciences",Agriculture
Journal title
ISSN journal
0032079X
Volume
158
Issue
2
Year of publication
1994
Pages
223 - 231
Database
ISI
SICI code
0032-079X(1994)158:2<223:LCOSNT>2.0.ZU;2-G
Abstract
A long-term comparison between two routine soil nitrogen tests, soil n itrate versus plant indicator method, was performed on the Negev Deser t loessial soil in Israel. The Gilat plant indicator method was found to be a better method to reflect the soil nitrogen availability for wh eat under field conditions. It was found that 15 to 38 kg ha(-1) of NO 3-N, measured by nitrate soil test, for each 30 cm soil increment, is not available for plant uptake. This plant unavailable NO3-N backgroun d in the soil cannot be leached by repeated irrigation cycles of 100 m m each, or by heavy rains.