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November 23, 2015

Latest research for potatoes and other (K)ey crops by the SOP Information Board


A new book released by the Sulfate of Potash Information Board (SOPIB), the Use of Potassium Sulfate Fertilizer: Principles and Practices, is a 137-page guide for potassium and sulfur plant nutrition. This online publication offers the latest agronomic and economic research findings on sulfate of potash (SOP), including insights on application methods to agronomic research details.

The book includes below highlights of potato key findings, among other high-value crops.

  • A recent field experiment developed in India found increasing rates of K20 significantly affected growth and tuber yield as well as economic parameters. SOP application of 150 kg K20 ha proved to be the optimum rate for overall performance.
  • A tuber yield of 50 t per hectare needs close to 300 kg K20 ha-1 and about 135 kg of nitrogen.
  • To maintain high quality tubers that keep their quality even during cooking and frying, black spot disease and blackening is minimized with adequate K supply minimized. SOP fertilization rates usually exceed 300 kg K20 per hectare in order to obtain non-significant blackening indexes.

To explore more potatoes research results, as well as other crop research –download the Use of Potassium Sulfate Fertilizer: Principles and Practices.