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Nitrogen and Phosphate Fertilizer Levels in Relation to Potato Yields and to Soil Constituents during Dry Seasons
Author(s) -
Carolus R. L.,
Woltz W. G.
Publication year - 1945
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1945.036159950009000c0032x
Subject(s) - nitrogen , fertilizer , phosphate fertilizer , agronomy , nitrogen fertilizer , phosphate , environmental science , chemistry , biology , organic chemistry
DURING four consecutive years, in which periods of sub-normal rainfall within the spring growing season materially reduced white potato yields, an opportunity was available to obtain information under abnormal conditions regarding the influence of various fertilizer ratios on the yield of tubers and on potato plant and soil composition. The term abnormal may be used unadvisedly as spring drouth's are becoming increasingly frequent in many sections of eastern Virginia. During the past 10 years there has been a gradual change in the fertilizer used on the white potato crop in this area from a 6-6-5 ratio to a 6-8-6 ratio, and at present a further change to a 5-10-5 analysis. In view of the frequent reoccurrence of spring drouths, the facts reported in this paper indicate that these changes in fertilizer practice, which were partly necessitated by war conditions, may be moving in the right direction.,