Abstract
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 language | English |
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Pages (from-to) | 635-639 |
Number of pages | 5 |
Journal | Journal of Environmental Quality |
Volume | 13 |
Issue number | 4 |
DOIs | |
State | Published - 1984 |
ASJC Scopus subject areas
- Environmental Engineering
- Water Science and Technology
- Waste Management and Disposal
- Pollution
- Management, Monitoring, Policy and Law