The influence of irrigation on the nitrogen, phosphorous and potash requirements of different potato varieties
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Summary
- 1.
Three years’ results are reported for a 3N, 3P, 3K factorial fertilizer experiment with and without irrigation, in which 3 or 4 varieties of potatoes were grown each year.
- 2.
Green Mountain variety was grown each year and the three years indicated a need for more than 120 lbs. of nitrogen, providing the phosphorous level is kept below 160 lbs. P2O5 and potash is at a low to medium level. Without irrigation about 2000 lbs. of a 6-4-2 seemed best, but with irrigation 2000 lbs. of a 66-4-4 appeared best.
- 3.
Katahdin was grown two years. Without irrigation about 2000 lbs. of a 6-4-6 and with irrigation 2000 lbs. of a 6-4-2 were best.
- 4.
Mohawk was tested two years. Without irrigation about 2000 lbs of a 6-8-6 and with irrigation 2000 lbs. of a 6-8-4 was best.
- 5.
Sequoia in 1946 without irrigation did best on a ton of 4-4-6, but with irrigation a ton of 6-12-6 was best.
- 6.
Ontario in 1947 without irrigation needed a ton of 6-12-2 and with irrigation a ton of 4-12-2.
- 7.
Cobblers in 1948 without irrigation needed a ton of 6-4-6 and with irrigation a ton of 6-8-6.
- 8.
Results indicated a need for changes in the levels of the N, P, and K factors for the future conduct of this experiment.
Keywords
AMERICAN Potato Journal Potash High Nitrogen High Phosphorous Fertilizer RequirementPreview
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Literature Cited
- 1.Jacob, Walter C. Latin square half plaids for irrigation experiments. In press.Google Scholar
- 2.Kemp, W. B. 1938. Separating a generalized interaction into components. Jour. Amer. Soc. of Agr. 30: 419–424.Google Scholar
- 3.Wessels, P. H. 1941. Fertilizer distributor for factorial design experiments. Jour. Amer. Soc. of Agr. 33: 259–262.Google Scholar