1. Boron accumulation in sodic soil is the key factor for irrigation application of studied effluent water.

2. Studying continuous effect in improvement of heavy sodic soil with desulphurization by-product is important to obtain theories of completely improvement.

3. The hydrofracturing breccia is formed by deep rich- sodic and gold-hosted fluid hydrofracturing in a set of Devonian system hot-water sedimentary rich- sodic rocks.

4. At present the results of pinhole test and crumb test are prior to deciding the dispersivity of the high- sodic saline soil, but the results of normal double-hydrometer test, pore water salt...

5. The combined states of soil humic substances were studied after undecomposed organic materials were applied into sodic meadow paddy soil.

6. The way of using by-product from flue gas desulphurization to reclaim sodic soil is put forward in recent years, and the related theory for it is not perfect.