Effects of saline-sodic soil chemistry on soybean mineral composition and stomatal resistance

F. J. Coale, V. P. Evangelou, J. H. Grove

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Productivity of soybeans grown on a gradient of soils of increasing saline-sodic character were studied in greenhouse experiments. Soils with electrical conductivity (EC) exceeding 3. 20 dS m** minus **1 would not support soybean growth. Soybean plants accumulated significant quantities of Na when soil solution sodium adsorption ratio (SAR) exceeded 6. 4 and relative tissue Na accumulation was highly correlated with SAR. Estimates of potential productivity were made by stomatal diffusive resistance measurements at three vegetative growth stages. In a second experiment, saline-sodic soil was amended with four rates of gypsum. Plant dry matter production was minimized with the 2. 6 g kg** minus **1 amendment, which also produced plants with significantly reduced and negligible Na contents. The addition of gypsum apparently reduced the detrimental effects of physical impedance to root development and function.

Original languageEnglish
Pages (from-to)635-639
Number of pages5
JournalJournal of Environmental Quality
Issue number4
StatePublished - 1984

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law


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