Double Cropping Following Winter Barley Harvest in Eastern Virginia1

Camper, H. M.; Genter, C. F.; Loope, K. E.

doi:10.2134/agronj1972.00021962006400010001x

Cited by 31 publications

(17 citation statements)

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“…Production of small grains also generally improves farm cash flow due to summer harvest and grain sales. Yield of doublecrop soybeans ( Glycine max L.) planted following barley are also generally higher than when following wheat ( Triticum aestivum L.) because of earlier planting (Camper et al, 1972).…”

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Hulless Barley Seeding Rate Effects on Grain Yield and Yield Components

et al. 2009

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Recent efforts to expand markets for winter barley (Hordeum vulgare L.) in the mid‐Atlantic have focused on hulless types due to higher energy density. The exposed endosperm of hulless barley makes damage more likely than with hulled barley, and emergence is typically lower. Information to determine the optimum seeding rate for winter hulless barley is presently unavailable. Experiments were conducted over six site‐years in Virginia to evaluate seeding rate effects on grain yield and yield components of six hulless and three hulled barley lines. Seeding rates ranged from 278 to 742 viable seeds m−2. At similar seeding rates, final plant stands for hulless lines were 75% of that for hulled varieties. At equivalent plant density of 320 plants m−2, average grain yield for hulled lines was 6000 kg ha−1 and 4500 kg ha−1 for hulless lines. Yield of the best hulless barley line was 80% that of the hulled lines. A large portion of this is attributable to lower individual kernel weight, due to the absence of the hull weight. Hulless barley lines also had 5% fewer heads per square meter and 29% fewer grains per head. Seeding rates for hulless barley in a conventional, tilled seedbed should be at least 400 seeds m−2 to approach optimum yields. These results also support the conclusion that seeding at 480 to 520 seeds m−2 is appropriate for sites with high yield (5000 kg ha−1) potential.

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Hulless Barley Seeding Rate Effects on Grain Yield and Yield Components

et al. 2009

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“…Lewis and Phillips (1976) noted a 40% yield reduction of corn double‐cropped with wheat compared with when corn was planted within the traditional window of 9 April and 12 May. Camper, Genter, and Loope (1972) noted greater net returns from double‐cropped corn following barley ( Hordeum vulgare L.) compared with double‐cropping barley with grain sorghum or soybean. They also found that summer crops could be planted about 2 wk earlier when following barley rather than following wheat in a double‐cropping system.…”

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Response of agronomic crops to planting date and double‐cropping with wheat

et al. 2020

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Planting date can affect crop yield and is an important management decision for practitioners. Although wheat (Triticum aestivum L.) and soybean [Glycine max (L.) Merr.] can be effectively double-cropped in North Carolina, if commodity prices and projected economic returns are higher for crops other than soybean, growers might consider a nontraditional, double-crop system. Direct comparisons of major agronomic crops with different planting dates or in a double-crop system with wheat are limited in North Carolina. Therefore, research was conducted in North Carolina from 2013 through 2017 to determine yield potential of corn (Zea mays L.), cotton (Gossypium hirsutum L.), grain sorghum [Sorghum bicolor (L.) Moench], peanut (Arachis hypogaea L.), and soybean planted at two dates within the recommended planting window for full-season production versus planting these crops after wheat harvest.The experimental design was a split plot, with summer crop serving as the whole plot unit and planting date within a crop serving as the subplot unit. Yield of corn, cotton, grain sorghum, peanut, and soybean in full-season production exceeded that of double-cropping with wheat in 5, 5, 2, 4, and 5 yr out of 5 yr of the study, respectively. Estimated economic returns were generated using the 10-yr average (2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017) summer crop prices with the 10-yr average wheat price. When considering all possible combinations of years and crops (n = 25), in only 20% of the possible combinations was the economic return of the double-cropping system greater than economic return of full-season crop production when compared with at least one of the planting dates within the traditional planting window. 1972wileyonlinelibrary.com/journal/agj2 Agronomy Journal. 2020;112:1972-1980.

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“…It is early maturing and short in stature with good winter hardiness, good straw strength, and high grain volume weight. Winter barley is an integral component of double‐cropping systems in the eastern United States due to its early maturity in comparison to wheat ( Triticum aestivum L.) (Browning, 2011; Camper et al, 1972). Both wheat and barley allow producers to extend the time available for planting and harvesting these crops and reduce the buildup of crop‐specific pathogens.…”

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