salinity and sodicity are the major factors of soil degradation in arid and semiarid areas. the main aim of this study was to evaluate the capability of liss_iii data for soil salinity and sodicity mapping in a selected part of the qazvin plain, an area of arid environment. during the study, spectral classes were carried out of the remotely sensed data and then with the help of field observatio...

0

The study focused on investigating the contribution of reclamation strategies saline-sodic soils and their impacts soil fertility characteristics. In this study, treatments were denoted as: SG1 SG2 (23.8 47.7 ton/ha spent grain); TC1 TC2 47.6 compost); Azospirillium in inoculation with seed (Az); Az + (Az+SG1); (Az+TC1); mineral fertilizers (NPK); control (CK). All mixed pots 30 kg soil. result...

Many avocado growers are debating the question of whether or not to apply calcium to their groves. Some advocates say calcium is a necessary soil additive, creating almost magical improvements in soil chemical balance and tree growth. Others maintain that, since calcium is common in California soils, it serves only to improve soil structure in sodic soils or soils with permeability problems due...

Salt-affected soils, those on which plant growth is limited by an excess of salts, are of three types: (i) saline soils in which electrical conductivity is > 4 dSm 1; (ii) sodic soils in which the exchangeable sodium percentage (ESP) is > 15; and (iii) saline-sodic in which the electrical conductivity (EC) is > 4 dSm 1 and ESP is > 15. Salt-affected soils are most common in aridic moisture regi...