How to control saline-alkali land?

First of all, from a more economical and practical point of view, I will introduce an improved scheme to you. You can combine the method of raising grass to improve the emergency. Specifically, you can buy some forage seeds, such as alfalfa, for animal husbandry. Then you can raise some pigs or sheep on the ground. However, it should be noted that when alfalfa is in summer, you can directly break the branches and leaves on the ground and dig deep, then plant soybeans or soybeans and wait until it blooms. It is suggested that alfalfa, soybean and soybean rhizobia must be selected when choosing forage grass. They have fundamental nitrogen fixation function and are also excellent, so they are also the first choice. After a year of improvement, apply some organic fertilizers, such as sheep manure, in the coming year. But it is best not to use pig manure. In the second year, planting corn and interplanting soybeans or soybeans can be combined, and after a few years, it can suddenly improve basically. In order to improve the soil, the straw can be crushed and buried directly after the grain harvest every year.