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- W2738283981 abstract "Two experiments were conducted in 1992-93 and 1993-94 to examine the effect of different levels of nitrogen fertilizer (0, 15,45 and 90 kg N/ha in 1992-93; and 0 and 90 kg N/ha in 1993-94) and sowing dates (3 July and 30 September, 1992 and five dates ranging from 9 July 1993 to 10 November, 1993) on the development of yield and the variability of yield components in chickpeas. Variability in yield components, and therefore yield has been a major problem in chickpeas, ( Cicer arietinum L. ). In 1992-93 two levels of Rhizobium inoculation (0 and 480g/100kg seed) were also applied. The experimental treatments followed a randomised split-plot design. Data collected included that for yield, yield components, yield development and phenological development. In the first year seed yield was high, averaging 2.85 t/ha, but did not differ with either sowing date or nitrogen treatments. In 1993-94 both sowing date and application of nitrogen significantly affected total seed yield by influencing yield components. The number of plants/m2 ranged from 6 to 22 in the July and November sowings respectively. The number of pods/plant was most variable, with 129.7 produced in the July sowing and only 66.5 in the November sowing. The addition of 90 kg N/ha gave about 92 pods per plant while the plants receiving no N produced only 79 pods per plant. Randomly selected plants were tagged to monitor yield development from the 0 kg N/ha plots in the July 1992 sowing. On the main stem, 39% of filled pods were located on the middle third of the branch, while the bottom and top thirds had 35 and 26% of the filled pods respectively. On the largest primary branches location of filled pods was unrelated to their position on the branch. On the main stem or the three largest primary branches the first filled pod was normally located on nodes 11-13. Maximum seed yield was obtained from the secondary branches. In the second season, phenological development was strongly influenced by sowing date. Early sown plants reached 50 % flowering 124 days after sowing (DAS) and the latest sown plants reached tlowering 71 DAS. Selecting the right sowing time is an important consideration to be made to optimise and stabilise chickpea seed yields." @default.
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- W2738283981 date "1994-01-01" @default.
- W2738283981 modified "2023-09-24" @default.
- W2738283981 title "Development of yield and variability in yield components of chickpeas" @default.
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