| Summary: | The objective of this research was to study the effect of potassium fertilization on potato.
During October 1979 — March 1980 measurements of yield, tuber quality and starch content were made in a field experiment on irrigated soils of the Lower Valley of the Colorado River (Province of Buenos Aires, Argentina).
Treatments consisted of: (0) control; (1) 100, (2) 1.50 and (3) 200 kg K2 Olha and the results obtained showed.
1 ) Yield response to potash application was statiscally significant. 2) Fertilization with 200 kg 1(20/ha gave the highest yield. 3) Total yield in each treatment was correlated with the rate of potassium applied; the correlation coefficient was r = 0.77 4) When potassium rates were increased there was an increase on the production of the largest size tubers (group A) and there was a decrease on the production of the largest size tubers (group A) and there was a decrease of lower size tubers (groups C, and 5). The correlation coefficient between yield of group A tubers of highest commerical quality and potassium applied was significant (r = 0.75).5) Starch content on tubers was not significantly different along different treatments though it was slightly higher in the control treatments as it was their dry matter content.
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