Effectiveness of soil conditioners to enhance salt extraction ability of in saline-sodic soil for different soil moisture contents.

Soil salinity is considered one of the main types of soil degradation in semiarid environments around the globe. This work aims to evaluate the effectiveness of soil conditioners to enhance the growth and salt extraction ability of for different soil moisture contents. plants were cultivated in pots in which the soils were treated with the following conditioners: control; gypsum + organic matter; elemental sulfur + organic matter; and gypsum + elemental sulfur + organic matter.

Spectral reflectance characteristics of soils in northeastern Brazil as influenced by salinity levels.

In northeastern Brazil, large swaths of once-productive soils have been severely degraded by soil salinization, but the true extent of the damage has not been assessed. Emerging remote sensing technology based on hyperspectral analysis offers one possibility for large-scale assessment, but it has been unclear to what extent the spectral properties of soils are related to salinity characteristics. The purpose of this study was to characterize the spectral properties of degraded (saline) and non-degraded agricultural soils in northeastern Brazil and determine the extent to which these properties correspond to soil salinity.