Affiliation:
1. Soil and Water Dep. , College of Agriculture, University of Salahaddin
Abstract
Fertilization is one of the efforts done by farmers to increase the production and
quality of onions. The research aimed to find out the effect of different levels of
nitrogen, phosphorus, and potassium fertilizers on the growth and production of
onions. The research was conducted in the Grdarash field, the experimental farm
of the College of Agriculture, University of Salahaddin. The research used a
spilt–spilled design. The first factor was nitrogen (0, 40, 80, 160 Kg .ha1
). The
second factor was phosphorus (0, 80, 160 Kg.ha-1
), and the third was Potassium
(0, 50, 100 Kg .ha-1
). The results indicated a highly significant interaction between NPK and onion bulb yield. The treatment (K1 P2 N1) has the highest significant yield production (18 .36 Mg. ha-1
) And the best interaction between the
nitrogen, phosphorus and potassium fertilizers; this treatment addition was (K 50,
P 160 and N 40 Mg .ha-1
). K1 P1 was the most significant interaction between
Potassium and Phosphorus. K1 N1 was the most significant interaction between
Potassium and Nitrogen.
Keywords: Nitrogen, Phosphorus, Potassium, Onion, Bulb yield
Subject
Infectious Diseases,Applied Microbiology and Biotechnology,Epidemiology,Biotechnology
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