Long-term k fertilization effects on soil available k, grain yield, and plant k critical value in winter wheat

HIGHLIGHTS

SUMMARY

Investigating the long-term effect of contrasted rates of applied K on different soil types is crucial to identify the soil K reserves and soil conditions susceptible to K deficiency in crops. The K withdrawn by roots from the soil solution is replenished at a rate regulated by the soil K buffer power, that is, "the soil capacity to resist a change in soil solution K concentration following removal or input of K to the soil-plant system" (Schneider et_al 2013). Usually, fertilization guidelines provide soil K critical values, i.e., values of a . . .

 



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