Following dry seasons in which much of the applied nitrogen is not utilized by the plant but prevented from leaching by green manure cropping, a reduction in the amount of nitrogen applied for potatoes is not only justifiable but highly desirable. On acid soils large quantities of phosphate in potato fertilizers are apparently necessary, regardless of previous weather conditions, until the phosphate-fixing capacity of the soil is adequately satisfied. Tuber yields are not necessarily correlated with plant growth, as high tuber yields were produced on plots with both low and high plant weights and low tuber yields were also produced on plots with both low and high plant weights. In view of the above results a 5-10-5 analysis is probably at least as well suited to most soils on the Eastern Shore of Virginia as the 6-8-6 analysis and high analysis phosphatic materials may suitably be used in its formulation.