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Behaviour of leaf water potentials of wheat and mungbean under field conditions as a function of available soil moisture and relative humidity
Author(s) -
Nagarajarao Y.
Publication year - 1984
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19841470106
Subject(s) - environmental science , water content , udic moisture regime , loam , canopy , agronomy , soil water , irrigation scheduling , moisture , irrigation , relative humidity , dew , dns root zone , soil science , condensation , biology , botany , geography , geology , geotechnical engineering , meteorology
Field experiments were conducted with wheat and summer mungbean on an alluvial sandy loam soil (Typic Ustochrept). Data were obtained concurrently on soil moisture, leaf water potentials and relative humidity above crop canopy, in order to establish correlations between plant water status and soil moisture and aerial environment. In case of wheat, leaf water potentials correlated well with available soil moisture percentage remaining in the root zone as well as relative humidity above the crop canopy, only for the reproductive phase of crop growth. For the vegetative phase of crop growth, no relationships could be established, possibly because of high and non‐limiting soil moisture. For mungbean, which is capable of avoiding drought, only 0900 hours leaf water potential correlated with available moisture remaining the root zone. For adapting the regressions for scheduling irrigation, important growth phases have to be considered separately.