Effect of irrigation and nitrogen on oil percentage, yield and water-use efficiency of winter sunflower (Helianthus annuus)

Citation
Uk. Prasad et al., Effect of irrigation and nitrogen on oil percentage, yield and water-use efficiency of winter sunflower (Helianthus annuus), I J AGRON, 46(1), 2001, pp. 171-176
Citations number
4
Categorie Soggetti
Agriculture/Agronomy
Journal title
INDIAN JOURNAL OF AGRONOMY
ISSN journal
0537197X → ACNP
Volume
46
Issue
1
Year of publication
2001
Pages
171 - 176
Database
ISI
SICI code
0537-197X(200103)46:1<171:EOIANO>2.0.ZU;2-8
Abstract
An experiment was conducted to study the influence of irrigation and nitrog en on oil (%) and seed yield of 'Arun Hybrid' of sunflower (Helianthus annu us L.). Significant increase in yield (17.4 and 18.0 q/ha) was recorded up to 3 irrigations with IW : CPE ratio of 0.8. Oil yield and net returns were also maximum at this level. The crop showed significant response up to 40 kg N/ha. The leaf-area index and other ancillary characters were also maxim um in case of 3 irrigations and 40 kg N/ha. Oil (%) and water-use efficienc y were higher at 1 irrigation but from the economic point of view, 3 irriga tions resulted in more net returns. Soil-moisture depletion in 0-60 cm laye r was higher than that in 60-90 cm soil layer, but the relative depletion i n 60-90 cm layer was more in rainfed due to penetration of roots in search of soil moisture.