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How much nitrogen for early potatoes?

How much nitrogen for early potatoes?

Kartoffelbau 33(2): 41-42, 44-45

In trials at 5 sites in Bavaria in 1979-81, potatoes Saskia, Christa and Ukama received 100-180 kg N/ha (60-140 kg at 1 site in 1981). Yield varied more between than between N rates, and there were significant N X interactions in only 2 cases. Increasing N from 100 to 140 kg/ha increased av. yields by 0.5, 0.5 and 0.3 t/ha, resp., in the 3 A further increase to 180 kg/ha increased av. yield of Christa by 1.1 t/ha and reduced yields of Saskia and Ukama by 0.5 and 0.3 t, resp.

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