Potash fertilizer on potatoes: Yields of field-run White Rose potatoes increased materially by potash treatments in fertilizer trials in Madera County
Clarence E. Johnson, University of California
California Agriculture 12(7):10-11. DOI: 10.3733/ca.v012n07p10.
Clarence E. Johnson is Farm Advisor, Madera County, University of California.
Abstract Not Available – First paragraph follows:
Out of 11 trials completed over a nine-year period, significant responses—increases as high as 31%—have been obtained from five out of six trials on Ripperdan soils. In the sixth trial on Ripperdan soil and in one trial out of three on Hanford soils, the response was only slightly below the degree of significance. No response was obtained in one trial each on a Ripperdan-Dinuba soil and on a Grangeville soil.
Forrest Fullmer of the American Potash Institute assisted in the above studies.