The first time of drying and wetting cycle gave the most influence to total quantity of fixed potassium , and with cycles increasing , it ' s influence became weaker
2.
Under applying k 200mg / kg , k fixation capacity of four soils strengthened with drying and wetting cycle and temperature increasing , so , the availability weakened . in general , capacities of fixing potassium of soils in turns were : heir lu soil > lou soil > loessial soil > aeolian sandy soil
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