Uneven variation in plant-to-plant spacing in pearl millet

Soman, P and Jayachandran, R and Bidinger, F R (1987) Uneven variation in plant-to-plant spacing in pearl millet. Agronomy Journal , 79 (5). pp. 891-895. ISSN 0002-1962

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Plant-to-plant spacing in fields of Pennisetum americanum is often highly variable. The effect of typical variation in spacing on grain yield was determined in a range of cropping situations. 20 within-row spacing patterns were designed so that the variance of spacing (Vs) between plants would range from 0 to 2.3 m². Plant population, fertility and season were also variants. In all the trials, seeds were sown in predetermined positions in each row and later thinned to a single plant/position. As Vs increased from 0.01 to 0.05, 0.10 and 0.70 m², yields declined by 21, 29 and 47%, resp. This reduction in yield did not depend on fertility level, season or plant population. Most of the yield reduction could be attributed to reduction in panicle number/plant. The results suggest that the tillering capacity of P. americanum, although it provides the capacity to adjust to a wide range of plant populations per se, does not provide adjustment to major changes in Vs

Item Type: Article
Uncontrolled Keywords: Pennisetum americanum (L.) Leeke, Plant stand, Variance of plant spacing, Plant population
Subjects: Mandate crops > Millets
Depositing User: Ms K Syamalamba
Date Deposited: 04 Nov 2011 09:05
Last Modified: 04 Nov 2011 09:05
URI: http://oar.icrisat.org/id/eprint/3657
Official URL: http://dx.doi.org/10.2134/agronj1987.0002196200790...
Acknowledgement: UNSPECIFIED
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