Abstract
Abstract Soybeans ( Glycine max L.) for grain and sorghum ( Sorghum vulgare L.) and maize ( Zea mays L.) for both grain and silage were planted in late June and in July following winter barley ( Hordeum vulgate L.) to evaluate these crops in a double cropping system in eastern Virginia. Soybeans have been widely grown after barley in that area. Production and harvest costs were estimated and net returns were calculated from these estimates and the values of the crops produced. Grain yields were obtained over a 2‐year period. Both mid‐season and late maturity soybeans produced crops of satisfactory quality each year. Early or very early maturity sorghum and maize hybrids were planted and appeared to be satisfactory for grain when planted in June but one July planting was severely damaged by an early frost. When the June plantings were harvested for grain, the net return from maize was significantly greater than from either sorghum or soybeans. Soybeans, however, appeared to be more dependable than maize or sorghum for grain if planted in July. Maize and sorghum silage yields were obtained the second year of the experiment. Net returns from both crops for silage were consistently greater at each date of planting than from any grain crop. All but one of the differences were significant. Net returns were greater from sorghum silage than from maize at each date of planting and the difference was significant for the July planting. Better adapted strains of all three crops are needed for use in a double cropping system.
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Claims 5
Claim · model-written summary
For June plantings harvested for grain, maize gave significantly greater net returns than sorghum or soybeans.
- Treatment
- June plantingse1
- Outcome
- net returne1
- Direction
- significantly greatere1
- Comparator
- sorghum or soybeanse1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“When the June plantings were harvested for grain, the net return from maize was significantly greater than from either sorghum or soybeans”
Claim · model-written summary
Soybeans appeared more dependable than maize or sorghum for grain when planted in July.
- Taxon
- Soybeans
Glycine maxe2 - Treatment
- planted in Julye2
- Outcome
- dependablee2
- Direction
- more dependablee2
- Comparator
- maize or sorghume2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Soybeans, however, appeared to be more dependable than maize or sorghum for grain if planted in July”
Claim · model-written summary
Net returns from maize and sorghum silage were consistently greater than from any grain crop at each planting date, with all but one difference significant.
- Treatment
- for silagee3
- Outcome
- Net returnse3
- Direction
- consistently greatere3
- Qualifier
- All but one of the differences were significante7
- Comparator
- any grain crope3
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Net returns from both crops for silage were consistently greater at each date of planting than from any grain crop”
e4“Maize and sorghum silage yields were obtained the second year of the experiment”
e7“All but one of the differences were significant”
Claim · model-written summary
Sorghum silage gave greater net returns than maize silage at each planting date, significant for the July planting.
- Treatment
- sorghum silagee5
- Outcome
- Net returnse5
- Direction
- greatere5
- Qualifier
- significant for the July plantinge5
- Comparator
- maizee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Net returns were greater from sorghum silage than from maize at each date of planting and the difference was significant for the July planting”
Claim · model-written summary
Better adapted strains of all three crops are needed for double cropping.
Verbatim
e6“Better adapted strains of all three crops are needed for use in a double cropping system”
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See all 54 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.