Abstract
Abstract Having similar profit potential but roughly half of the water requirements of corn ( Zea mays L.), cotton ( Gossypium hirsutum L.) has become an attractive crop in the Southern High Plains (SHP) where groundwater levels and well capacities continue to decline. However, unpredictable and erratic precipitation often results in conditions either too wet or too dry for ideal germination. Coupled with a relatively short planting window for adequate heat unit accumulation and the threat of severe weather events, cotton crops can fail, leaving limited options for producers wanting to plant a second summer crop. One option is short‐season soybean [ Glycine max (L.) Merr.]. However, limited data on crop water use (evapotranspiration, ET), crop coefficient ( K c ), and yield exist for late‐planted soybean in the semiarid SHP. After unseasonably wet conditions in May 2019, a short‐season soybean variety was planted on 13 June in irrigated weighing lysimeter fields at the USDA‐ARS Conservation and Production Research Laboratory at Bushland, TX. Results showed profitable yields (4,786–4,996 kg ha –1 ), and although maximum daily K c values were not different than published values, season length was 24–29 d shorter than for soybean planted in mid‐May. Seasonal water use was less than that of archived data using earlier planting dates in 2 of 3 yr, although those studies used different varieties. Crop coefficient functions using both short and tall standardized reference ET values are presented for sprinkler and subsurface drip irrigation systems. Although these data are useful to producers in the SHP, additional data are needed to develop K c functions that better characterize interannual variations in weather.
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Claims 5
Claim · model-written summary
Late-planted soybean gave profitable yields of 4,786–4,996 kg ha–1 at Bushland, TX.
- Taxon
- Glycine max (L.) Merr.
Glycine maxe0 - Treatment
- planted on 13 Junee2
- Outcome
- yieldse1
- Value
- 4,786–4,996 kg ha –1e1
- Qualifier
- profitablee1
- Setting
- Bushland, TXe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycine max (L.) Merr.”
e1“Results showed profitable yields (4,786–4,996 kg ha –1)”
e2“was planted on 13 June in irrigated weighing lysimeter fields”
e3“Research Laboratory at Bushland, TX”
Claim · model-written summary
Season length was 24–29 d shorter for soybean planted on 13 June than for soybean planted in mid-May.
- Taxon
- Glycine max (L.) Merr.Glycine maxe0
- Treatment
- planted on 13 Junee1
- Outcome
- season lengthe2
- Direction
- shortere2
- Value
- 24–29 de2
- Comparator
- soybean planted in mid‐Maye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycine max (L.) Merr.”
e1“was planted on 13 June in irrigated weighing lysimeter fields”
e2“season length was 24–29 d shorter than for soybean planted in mid‐May”
Claim · model-written summary
Seasonal water use of soybean planted on 13 June was less than in archived data using earlier planting dates, in 2 of 3 years.
- Taxon
- Glycine max (L.) Merr.Glycine maxe0
- Treatment
- planted on 13 Junee1
- Outcome
- Seasonal water usee2
- Direction
- lesse2
- Qualifier
- in 2 of 3 yre2
- Comparator
- archived data using earlier planting datese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycine max (L.) Merr.”
e1“was planted on 13 June in irrigated weighing lysimeter fields”
e2“Seasonal water use was less than that of archived data using earlier planting dates in 2 of 3 yr”
Claim · model-written summary
Maximum daily Kc values of late-planted soybean were not different from published values.
- Taxon
- Glycine max (L.) Merr.Glycine maxe0
- Outcome
- maximum daily K c valuese1
- Direction
- not differente1
- Comparator
- published valuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycine max (L.) Merr.”
e1“maximum daily K c values were not different than published values”
Claim · model-written summary
Crop coefficient functions using short and tall standardized reference ET values are presented for sprinkler and subsurface drip irrigation systems.
- Taxon
- Glycine max (L.) Merr.Glycine maxe0
- Treatment
- sprinkler and subsurface drip irrigation systemse1
- Outcome
- Crop coefficient functionse1
- Comparator
- short and tall standardized reference ET valuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glycine max (L.) Merr.”
e1“Crop coefficient functions using both short and tall standardized reference ET values are presented for sprinkler and subsurface drip irrigation systems”