Abstract
In sufficient amounts and distribution of rainfall are often the major limiting factors to crop production in the southern Great Plains. This is especially true for summer crops, whether grown in mono- or double-cropping situations, for these factors have a significant impact on yields and profitability. This study was conducted at the Oklahoma Vegetable Research Station, Bixby, Oklahoma, from 1980–1984 on a Wynona silt loam soil (Cumulic Hapla-quolls) with 0–1% slope. The objectives were to compare yields and net economic returns of mono- and double-cropped wheat [Triticum aestivum (L.) EM. Thell] and soybeans [Glycine max (L.) Merr.], where all wheat was produced under rain-fed conditions and where mono- and double-cropped soybeans were produced under both rain-fed and irrigated conditions. Over the 5-year period, rain-fed monocropped wheat yielded an average of 3498, compared with 3008 and 2948 kg ha-1 for rain-fed, double-cropped wheat following irrigated and rain-fed double-cropped soybeans, respectively. Irrigated, conventionally tilled monocropped soybeans yielded an average of 2800 compared with 2162 kg ha-1 for rain-fed, conventionally tilled monocropped soybeans. Irrigated, no-till, double-cropped soybeans yielded an average of 2072 compared with 1546 kg ha-1 for rain-fed, no-till, double-cropped soybeans. Rain-fed double-cropped wheat and rain-fed, no-till, double-cropped soybeans produced the highest net economic return ($317 ha-1) of any of the five cropping systems. Net returns from rain-fed, double-cropped wheat and irrigated, no-till, double-cropped soybeans; rain-fed mono-cropped wheat; and rain-fed, conventionally tilled, monocropped soybeans were similar and ranged from $246, $238, and $233 ha-1, respectively. Irrigated, conventionally tilled, monocropped soybeans returned $183 ha-1. Irrigation increased the yields of mono- and double-cropped soybeans 638 and 526 kg ha-1, respectively. However, given these yields, the price of soybeans would have to increase from $0.25 kg-1 to $0.31 and $0.40 kg-1, respectively, for mono- and double-cropped soybeans before irrigation would become economically feasible.
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Claims 9
Claim · model-written summary
Rain-fed monocropped wheat yielded 3498 kg ha-1 versus 3008 and 2948 for the two double-cropped systems.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- rain-fed monocroppede0
- Outcome
- yieldede0
- Direction
- compared withe0
- Value
- 3498e0
- Qualifier
- 3008 and 2948 kg ha-1e0
- Comparator
- rain-fed, double-cropped wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rain-fed monocropped wheat yielded an average of 3498, compared with 3008 and 2948 kg ha-1 for rain-fed, double-cropped wheat following irrigated and rain-fed double-cropped soybeans, respectively”
Claim · model-written summary
Irrigated monocropped soybeans yielded 2800 versus 2162 kg ha-1 under rain-fed management.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- Irrigated, conventionally tilled monocroppede0
- Outcome
- yieldede0
- Direction
- compared withe0
- Value
- 2800e0
- Qualifier
- 2162 kg ha-1e0
- Comparator
- rain-fed, conventionally tilled monocropped soybeanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigated, conventionally tilled monocropped soybeans yielded an average of 2800 compared with 2162 kg ha-1 for rain-fed, conventionally tilled monocropped soybeans”
Claim · model-written summary
Irrigated no-till double-cropped soybeans yielded 2072 versus 1546 kg ha-1 rain-fed.
- Taxon
- soybeansGlycine maxe0
- Treatment
- Irrigated, no-till, double-croppede0
- Outcome
- yieldede0
- Direction
- compared withe0
- Value
- 2072e0
- Qualifier
- 1546 kg ha-1e0
- Comparator
- rain-fed, no-till, double-cropped soybeanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigated, no-till, double-cropped soybeans yielded an average of 2072 compared with 1546 kg ha-1 for rain-fed, no-till, double-cropped soybeans”
Claim · model-written summary
The rain-fed double-cropped wheat and soybean system gave the highest net return, $317 ha-1.
Verbatim
e0“Rain-fed double-cropped wheat and rain-fed, no-till, double-cropped soybeans produced the highest net economic return ($317 ha-1)”
Claim · model-written summary
Other wheat and soybean systems had similar net returns of $246, $238 and $233 ha-1.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Net returnse0
- Direction
- similare0
- Value
- $246, $238, and $233 ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net returns from rain-fed, double-cropped wheat and irrigated, no-till, double-cropped soybeans; rain-fed mono-cropped wheat; and rain-fed, conventionally tilled, monocropped soybeans were similar and ranged from $246, $238, and $233 ha-1, respectively”
Claim · model-written summary
Irrigated conventionally tilled monocropped soybeans returned $183 ha-1.
- Taxon
- soybeansGlycine maxe0
- Outcome
- returnede0
- Value
- $183 ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigated, conventionally tilled, monocropped soybeans returned $183 ha-1”
Claim · model-written summary
Irrigation increased monocropped soybean yield by 638 kg ha-1.
- Taxon
- soybeansGlycine maxe0
- Treatment
- Irrigatione0
- Outcome
- yields of mono-e0
- Direction
- increasede0
- Value
- 638e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation increased the yields of mono- and double-cropped soybeans 638 and 526 kg ha-1, respectively”
Claim · model-written summary
Irrigation increased double-cropped soybean yield by 526 kg ha-1.
- Taxon
- soybeansGlycine maxe0
- Treatment
- Irrigatione0
- Outcome
- double-cropped soybeanse0
- Direction
- increasede0
- Value
- 526 kg ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation increased the yields of mono- and double-cropped soybeans 638 and 526 kg ha-1, respectively”
Claim · model-written summary
Economic viability of irrigation required soybean prices of $0.31 and $0.40 kg-1 for mono- and double-cropping.
- Taxon
- soybeansGlycine maxe0
- Outcome
- irrigation would become economically feasiblee0
- Value
- $0.31 and $0.40 kg-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the price of soybeans would have to increase from $0.25 kg-1 to $0.31 and $0.40 kg-1, respectively, for mono- and double-cropped soybeans before irrigation would become economically feasible”
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See all 390 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.