Yield and Yield Components of Sorghum and Soybeans of Varying Plant Heights when Intercropped<sup>1</sup>

Elmore, Roger W.; Jackobs, J. A.

doi:10.2134/agronj1984.00021962007600040012x

Cited by 27 publications

(18 citation statements)

References 4 publications

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“…The maximum seed yield for soybean/sorghum intercrops was 73 % and 96 % of the monocrop yields of soybean and sorghum respectively, in 1986, while in 1987 it was 86 % and 93 % of monocrop soybean and sorghum, respectively. ELMORE and JACKOBS (1984) and ALLEN and OBURA (1983) reported yield reduc-6S PAL, OSENI and NORMAN tions of intercropped soybean and sorghum compared to monoculture soybean or sorghum. However, in soybean/maize intercrop, the maximum yield was 90 % and 94 % of monocrop of soybean and maize, respectively in 1986, while in 1987, the maximum yield was 92 % for soybean and 91 % for maize.…”

Section: ) Grain Yieldsmentioning

confidence: 99%

Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop

Pal¹,

Oseni²,

Norman³

1993

J Agronomy Crop Science

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Field experiments were conducted during the wet seasons of 1986 and 1987 at the Yandev Agricultural Experiment Station to investigate the effects of component density on the yield of sorghum or maize intercropped with soybean. Seed yield of the monocrops of sorghum, maize and soybean were higher than the individual components in the intercrops. Yields of component crops in the intercrop varied significantly with the components population density. The sorghum/soybean intercrops which had LER (Land Equivalent Ratio) up to 1.40 in 1986 and 1.35 in 1987 were more productive than soybean/maize intercrop with maximum LER of 1.28 and 1.34 respectively during 1986 and 1987. Similarly the ATER (Area X Time Equivalent Ratio) of sorghum/soybean was greater than in soybean/maize. However, for maximum productivity of sorghum or maize intercropped with soybean, optimum population of one component crop plus 1/2 optimum population of the companion crop is recommended depending on which of the crop is regarded as main or minor crop.

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Section: ) Grain Yieldsmentioning

confidence: 99%

Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop

Pal¹,

Oseni²,

Norman³

1993

J Agronomy Crop Science

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“…In grain sorghum–soybean intercropping, sorghum seed weight was lower in monoculture than in intercropping (Elmore and Jackobs, 1984; Pavlish, 1989; Wahua and Miller, 1978). Pavlish (1989) found an increase in soybean seed weight; other researchers found no difference in seed weight between monoculture and intercropped systems.…”

mentioning

confidence: 96%

Strip Intercropping Effects on Yield and Yield Components of Corn, Grain Sorghum, and Soybean

Lesoing

Francis

1999

Agronomy Journal

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20 to 24% higher corn yields and 10 to 15% lower soybean yields in adjacent border rows. Strip intercropping of corn (Zea mays L.) and soybean [Glycine Water stress, light quality, and shading are among the max (L.) Merr.] and grain sorghum [Sorghum bicolor (L.) Moench] and soybean may be a viable alternative to monoculture cropping to factors that affect crop yields and yield components at help reduce soil erosion. Careful study of yields and yield components different growth stages. Sixty-three percent shading of can add to understanding crop performance and contribute to design soybean plants caused abscission of half the pods (Mann of more productive systems. Rainfed and irrigated experiments were and Jaworski, 1970). Schou et al. (1978) showed that conducted in eastern Nebraska from 1988 to 1990, on a Sharpsburgshading soybean plants during reproductive growth insilty clay loam (fine, smectitic, mesic Typic Argiudoll), to quantify fluenced seed yield, but seed weight was not changed. strip-intercropping effects on crop yields and yield components. CornEgli and Yu (1991) found that shading from growth border-row and grain sorghum border-row yields next to soybean stages R1 to R5 in soybean reduced seed yields and increased significantly compared with inside rows in the strips. Inseed number, but did not affect seed size. These results creased seed number and seed weight contributed to higher corn are relevant to border soybean rows in strip interborder-row yields, while only seed number increased in grain sorghum border rows. Soybean border-row yields were lower next to all corn cropping. strips and next to grain sorghum strips at the rainfed site. SoybeanEffects of water stress on yield and yield components seed number was lower in border rows next to corn. Corn border-row in corn have been studied extensively. Eck (1986) found increases in seed number and seed weight indicate that competition for that water deficits during vegetative growth reduced resources was important in both reproductive and grain-filling periods; corn kernel number, but had little effect on weight per sorghum border-row increases in seed number suggest competition kernel. Kernel numbers were not affected by water defionly in the reproductive period. Higher corn density in border rows cits during grain filling unless severe deficits were immay further exploit a competitive advantage with soybean in the posed early in the period. Harder et al. (1982) also found reproductive period, perhaps increasing system productivity. Wholekernel number to be influenced by early stress, with system productivity of strip-intercropping systems was a maximum of 4% higher than monocultures of component crops, and gross returns G.W. Lesoing, Univ. of Missouri, 108 W. North Main, Richmond, cropped systems. Carter (1984) and Pavlish (1989) found MO 64085; C.A. Francis, Dep. of Agronomy and Ctr. for Sustainable a high positive correlation between yield and seed num-Agricultural Systems, 225 Keim Hall, Univ. of Nebraska, Lincoln, NE 68583-0949. Univ. of Nebra...

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“…However, the intercropped treatments were not significantly different (Table 7). Similar results were also obtained by Goldmon (1991) and Elmore and Jackobs (1984), where intercropped soybean produced lighter weight seeds than sole crop soybean.…”

Section: Lodgingsupporting

confidence: 85%

Wheat-soybean relay intercropping: Temporal and spatial effects

Flesch

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Relay intercropping soybean into wheat has great potential in Iowa by allowing two harvests on the same land area in the same year. Wheat is planted in September and soybean is interseeded into the standing wheat in May. This system can be important for Iowa by diversifying production, increasing farm productivity, and reducing soil erosion. A three year experiment was conducted near Boone, lA, to determine the effect of soybean planting dates and spatial arrangements on wheat and soybean in a relay intercropping system, and its relative agronomic efficiency. The experimental design was a split-plot with the main plots (planting dates) arranged in randomized complete blocks with three replications of each treatment. The soybean planting dates were: pre-heading=PDl, heading=PD2, and post-heading=PD3. Five spatial arrangements (sub-plots) were used: 1W:1S (one wheat row alternated with one soybean row), 2W:1S, 2W:2S, 3W:2S, and 4W:3S. Wheat yield was reduced on average by 33% with soybean interplanting, and was proportionally lower than the reduction of wheat plant population during implementation of the skiprow pattern (33 to 50%). Relay intercropped soybean produced 73% of the sole crop soybean, indicating skip-row patterns are a good alternative for higher soybean yield. Soybean planting at wheat pre-heading or at heading was the best alternative X for this system. Arrangements producing the best soybean yields were not good wheat producers and vice-versa, suggesting that improvements in the yield of one crop will negatively affect the yield of the companion crop in a wheatsoybean relay intercropping system. For soybean oriented producers, 2W:2S, 3W:2S and 4W:3S are good choices due to the high soybean grain yield. Arrangement IW:IS was intermediate for soybean and wheat yields. A land equivalent ratio (LER) of 1.46, on average, demonstrated the agronomic efficiency of relay intercropping over sole cropping.

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Yield and Yield Components of Sorghum and Soybeans of Varying Plant Heights when Intercropped¹

Cited by 27 publications

References 4 publications

Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop

Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop

Strip Intercropping Effects on Yield and Yield Components of Corn, Grain Sorghum, and Soybean

Wheat-soybean relay intercropping: Temporal and spatial effects

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Yield and Yield Components of Sorghum and Soybeans of Varying Plant Heights when Intercropped1

Cited by 27 publications

References 4 publications

Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop

Effect of Component Densities on the Productivity of Soybean/Maize and Soybean/Sorghum Intercrop

Strip Intercropping Effects on Yield and Yield Components of Corn, Grain Sorghum, and Soybean

Wheat-soybean relay intercropping: Temporal and spatial effects

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Yield and Yield Components of Sorghum and Soybeans of Varying Plant Heights when Intercropped¹