The composition and cooking quality of potatoes from fertilizer trials in the east riding of yorkshire

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Abstract
Potatoes from experimental plots on a potash‐deficient soil, which had been given different fertilizer treatments, showed only small differences in composition and cooking quality, except where muriate of potash was omitted from the fertilizer mixture. Potatoes from these plots had higher total solids and nitrogen but lower ash contents, and in 1948 were decidedly inferior in cooking qualities compaxed with potatoes from the other plots. Vitamin C assays showed only small differences between the treatments. Inclusion of potash in the fertilizer resulted in a marked increase in the yield of potatoes and in the yields of solid matter and nitrogen per acre, in spite of the tendency for the percentages of total solids and nitrogen in the tubers to fall.

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