Potassium supplying capacity of northeastern Portuguese soils


In Portugal, the response to K application is often inconsistent with the Egner-Riehm values for available K. This is partly related to high K reserves of some soils. Twenty surface soils representative of different parent materials from NE Portugal were studied to determine their K supplying capacity. Continuous cropping with perennial ryegrass permitted… (More)
DOI: 10.1007/BF00011065


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