Abstract
Core Ideas Yield gains from available soil water at planting decreased as in‐season precipitation increased. Corn yield gain 27 to 33 kg ha –1 (mm available soil water at planting) –1 at in‐season precipitation of 196 to 215 mm. Corn yield gain 9 to 25 kg ha –1 (mm available soil water at planting) –1 as in‐season precipitation increased to 288 to 354 mm. Sorghum yield gain 12 to 22 kg ha –1 (mm available soil water at planting) –1 at in‐season precipitation of 163 to 281 mm. Sorghum yield gain 0 to 6 kg ha –1 (mm available soil water at planting) –1 at in‐season precipitation of 315 to 382 mm. Most dryland soil and crop management systems are geared toward improving amount and use of available soil water (ASW) at planting (ASWP) and in‐season precipitation (ISP). The relationship between ASWP and yield has seldom been a singular research focus. The objective of this study was to investigate the effect of different levels of ASWP on yield and water productivity of dryland corn ( Zea mays L.) and grain sorghum [ Sorghum bicolor (L.) Moench]. The study was conducted at two locations, Tribune and Colby, KS, for 3 yr, 2012 to 2014. Four different levels of ASWP were established by applying irrigation prior to planting (0, 38, 76, or 114 mm). Corn and sorghum yield increased in response to increased ASWP but yield gains per millimeter of ASWP decreased as ISP increased. Corn yield gain was in the range of 27 to 33 kg ha −1 (mm ASWP) −1 when ISP was in the range of 196 to 215 mm and yield gain decreased to 9 to 25 kg ha −1 (mm ASWP) −1 when ISP increased to 288 to 354 mm. Similarly, grain sorghum yield response to ASWP decreased from 12 to 22 kg ha −1 to 0 to 6 kg ha −1 per millimeter ASWP when ISP increased from 163 to 281 mm to a range of 315 to 382 mm. We concluded that dryland corn and grain sorghum yield increased with increased level of ASWP and a significant contribution of ASWP to yield production is realized when ISP is low.
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Claims 6
Claim · model-written summary
Corn yield increased in response to increased available soil water at planting (ASWP).
- Taxon
- Corn
Zea mays subsp. mayse1 - Treatment
- increased ASWPe1
- Outcome
- yielde1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn and sorghum yield increased in response to increased ASWP”
Claim · model-written summary
Sorghum yield increased in response to increased available soil water at planting (ASWP).
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn and sorghum yield increased in response to increased ASWP”
Claim · model-written summary
Corn yield gain per mm of ASWP was 27 to 33 kg/ha when in-season precipitation was 196 to 215 mm.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- ASWPe1
- Outcome
- yield gaine1
- Direction
- increaseinferrede1
- Value
- 27 to 33 kg ha −1 (mm ASWP) −1e1
- Qualifier
- when ISP was in the range of 196 to 215 mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn yield gain was in the range of 27 to 33 kg ha −1 (mm ASWP) −1 when ISP was in the range of 196 to 215 mm and yield gain decreased to 9 to 25 kg ha −1 (mm ASWP) −1 when ISP increased to 288 to 354 mm”
Claim · model-written summary
Corn yield gain per mm of ASWP decreased to 9 to 25 kg/ha when in-season precipitation increased to 288 to 354 mm.
- Taxon
- CornZea mays subsp. mayse1
- Treatment
- ASWPe1
- Outcome
- yield gaine1
- Direction
- decreasede1
- Value
- 9 to 25 kg ha −1 (mm ASWP) −1e1
- Qualifier
- when ISP increased to 288 to 354 mme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Corn yield gain was in the range of 27 to 33 kg ha −1 (mm ASWP) −1 when ISP was in the range of 196 to 215 mm and yield gain decreased to 9 to 25 kg ha −1 (mm ASWP) −1 when ISP increased to 288 to 354 mm”
Claim · model-written summary
Grain sorghum yield response per mm of ASWP was 12 to 22 kg/ha when in-season precipitation was 163 to 281 mm.
- Taxon
- grain sorghum
Sorghum bicolore2 - Treatment
- ASWPe2
- Outcome
- yield response to ASWPe2
- Direction
- increaseinferrede2
- Value
- 12 to 22 kg ha −1e2
- Qualifier
- when ISP increased from 163 to 281 mme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“grain sorghum yield response to ASWP decreased from 12 to 22 kg ha −1 to 0 to 6 kg ha −1 per millimeter ASWP when ISP increased from 163 to 281 mm to a range of 315 to 382 mm”
Claim · model-written summary
Grain sorghum yield response per mm of ASWP decreased to 0 to 6 kg/ha when in-season precipitation increased to 315 to 382 mm.
- Taxon
- grain sorghumSorghum bicolore2
- Treatment
- ASWPe2
- Outcome
- yield response to ASWPe2
- Direction
- decreasede2
- Value
- 0 to 6 kg ha −1e2
- Qualifier
- to a range of 315 to 382 mme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“grain sorghum yield response to ASWP decreased from 12 to 22 kg ha −1 to 0 to 6 kg ha −1 per millimeter ASWP when ISP increased from 163 to 281 mm to a range of 315 to 382 mm”