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Paolo Benincasa, Francesco Tei and Adolfo Rosati

. Spear yield. The yield in fresh spears was unaffected by either genotype or plant density in 2005 ( Table 1 ) or 2006 ( Table 2 ) and was 1307 kg·ha −1 in 2005 and 1186 kg·ha −1 in 2006. These figures are in agreement with yields recorded in other

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Martin M. Williams II

changed little over the last 80 years in the United States despite 6-fold yield gains ( Egli, 2015 ). The sink limitation has been largely overcome in grain corn by improving plant density tolerance (also known as crowding stress tolerance) and planting

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S. Alan Walters

; Schultheis et al., 2007 ; Strang et al., 2004 ), little has been done to determine the optimum spacing for mini triploid watermelon to obtain the highest percentages of marketable fruit (packout) in the 3- to 8-lb range. Increasing watermelon plant densities

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Juan C. Rodriguez, Nicole L. Shaw and Daniel J. Cantliffe

field experiments conducted in north–central Florida, planting densities of 1.0, 2.0, and 3.0 plants/m 2 of Galia-type muskmelons did not affect fruit yield ( Paris et al., 1988 ). Soluble solids content (SSC) of muskmelon grown at higher densities has

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Jennifer Wetzel and Alexandra Stone

influenced by planting density. Specific planting density recommendations from the United States cover a broad category of crops, including pumpkins and winter squash. For example, the National Center for Appropriate Technology sustainable agriculture program

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Ramon G. Leon and Delanie Kellon

growers to have a greater technical understanding of the crop to ensure success. Unfortunately, there is limited information about ‘MD-2’ growing requirements in the literature. Planting density and fertilization are among the production factors that have

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Brian Ward, Powell Smith, Susan James, Zachary Stansell and Mark Farnham

contrary, Californian growers plant up to 172,000 plants/ha and yield up to 20,000 kg·ha −1 . There are a limited number of earlier research trials examining the effects of variable broccoli plant densities on head production, and those that are available

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Anke van der Ploeg, Susana M.P. Carvalho and Ep Heuvelink

at suboptimal temperatures, another strategy is to breed for heavier plants at a suboptimal temperature regime ( Van der Ploeg et al., 2007a ). This would allow a higher planting density at lower temperatures, thus making up for the increase in

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Daniel I. Leskovar, Shinsuke Agehara, Kilsun Yoo and Nuria Pascual-Seva

questionable whether conventional plant spacing results in maximum yield, particularly for root and tuber crops. In accordance with Caliskan et al. (2009) , the optimization of plant density is of great importance in maximizing yield, because increasing plant

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Sabine R. Green, Geno A. Picchioni, Leigh W. Murray and Marisa M. Wall

of field-grown globe amaranth and celosia as affected by species and cultivar selection, planting density, and harvest timing. Growth rates and productivity of these warm-season annuals under adequate irrigation should increase with the progression of