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References in periodicals archive ?
(2002) reported that increasing plant population density by two times significantly decreased both biomass and yield of individual plants for semi-determinate and indeterminate tropical soybean varieties.
Thus plant population density was the major determinant of seed yield given the modest increase in seed yield realized at the same inter-row spacing with changes in plant densities.
In [E.sub.2], treatments were arranged in a split plot design with three replicates, with plant population density as the main factor and hybrids as the subfactor.
At the same time, plant population density had no significant (p greater than 0.05) effect on the number of days to emergence.
These results are supported by Emam (2001) who verified that kernels ear-1 and kernels ear-1 row are the most important yield adjustment components in response to plant population density in maize.
The highest plant population density (400,000 plants/ha) suppressed weeds (weed score, 3.3 at 6 WAP) better than the lowest plant population (66,667 plants/ha) that had weed a score of 3.5 at 6 WAP.
In a companion paper (Edwards and Purcell, 2005) we noted that HI of MG V and VI cultivars had a negative response to increased plant population density. Data presented in Fig.
Plant population density was determined at approximately R1 (Fehr and Caviness, 1977) by counting plants in two separate 1-m segments of each plot.
Because a number of lines with improved tolerance to low N were obtained by selecting and inbreeding under high plant density, tolerance to high plant population density was suggested as an alternative breeding strategy to improve tolerance to diverse abiotic stresses including drought and low N (Vasal et al., 1997).
The total seasonal amount of pollen, P, was defined by the average pollen production per plant and the plant population density. The day of maximum pollen shed, [t.sub.x], typically occurs 2 or 3 d after anthesis (50% Beg Shed) (Bassetti and Westgate, 1994; Fonseca et al., 2003).
The plant population density was 58 687 plants [ha.sup.-1].
The experimental layout was a split-plot design with the main plots (plant population density) arranged in a randomized complete block and replicated four times.
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