Abstract
Management inputs that maximize economic return from the early soybean [ Glycine max (L.) Merr.] production system have not been evaluated fully. The objective was to determine the effect of weed management on yield and net return from early planted maturity group (MG) IV and MG V glyphosate [ N ‐(phosphonomethyl)‐glycine]‐resistant (GR) and conventional (CONV) soybean cultivars grown in the early soybean production system with (IRR) and without (NI) irrigation. Field studies were conducted from 1996 through 1999 on Sharkey clay (very‐fine, smectitic, thermic Chromic Epiaquert) at Stoneville, MS (33°26′ N lat). Weed management systems were (i) pre‐emergent (PRE) broadleaf followed by postemergent (POST) broadleaf and grass weed management (PRE + POST) and (ii) POST broadleaf and grass weed management (POST). Use of POST‐only weed management was cheaper, yielded more, and resulted in greater net returns than did use of PRE + POST weed management with both CONV and GR cultivars. Under the conditions of this study, use of GR vs. CONV cultivars in an NI or low‐yield environment resulted in greater profit ($52 vs. −$17 ha −1 3‐yr average, respectively). Use of CONV vs. GR cultivars resulted in greater profit in an IRR or high yield environment ($382 vs. $266 ha −1 3‐yr average, respectively). These results indicate that use of GR cultivars with POST‐only weed management will result in greater profit in an NI environment while use of CONV cultivars with POST‐only weed management will result in greater profit in an IRR environment.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
POST‐only weed management gave greater net returns than PRE + POST weed management with both CONV and GR cultivars.
- Taxon
- soybean
Glycine maxe0 - Material
- CONV and GR cultivarse1
- Treatment
- POST‐only weed managemente1
- Outcome
- net returnse1
- Direction
- greatere1
- Comparator
- PRE + POST weed managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the early soybean [ Glycine max (L.) Merr.] production system”
e1“Use of POST‐only weed management was cheaper, yielded more, and resulted in greater net returns than did use of PRE + POST weed management with both CONV and GR cultivars”
Claim · model-written summary
POST‐only weed management yielded more than PRE + POST weed management with both CONV and GR cultivars.
- Taxon
- soybeanGlycine maxe0
- Material
- CONV and GR cultivarse1
- Treatment
- POST‐only weed managemente1
- Outcome
- yielde1
- Direction
- moree1
- Comparator
- PRE + POST weed managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the early soybean [ Glycine max (L.) Merr.] production system”
e1“Use of POST‐only weed management was cheaper, yielded more, and resulted in greater net returns than did use of PRE + POST weed management with both CONV and GR cultivars”
Claim · model-written summary
POST‐only weed management was cheaper than PRE + POST weed management with both CONV and GR cultivars.
- Taxon
- soybeanGlycine maxe0
- Material
- CONV and GR cultivarse1
- Treatment
- POST‐only weed managemente1
- Outcome
- cheapere1
- Direction
- lowerinferrede1
- Comparator
- PRE + POST weed managemente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the early soybean [ Glycine max (L.) Merr.] production system”
e1“Use of POST‐only weed management was cheaper, yielded more, and resulted in greater net returns than did use of PRE + POST weed management with both CONV and GR cultivars”
Claim · model-written summary
GR cultivars gave greater profit than CONV cultivars in a non-irrigated or low-yield environment.
- Taxon
- soybeanGlycine maxe0
- Treatment
- GR vs. CONV cultivarse3
- Outcome
- profite3
- Direction
- greatere3
- Comparator
- CONV cultivarse3
- Setting
- NI or low‐yield environmente3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the early soybean [ Glycine max (L.) Merr.] production system”
e3“use of GR vs. CONV cultivars in an NI or low‐yield environment resulted in greater profit”
Claim · model-written summary
CONV cultivars gave greater profit than GR cultivars in an irrigated or high-yield environment.
- Taxon
- soybeanGlycine maxe0
- Treatment
- CONV vs. GR cultivarse4
- Outcome
- profite4
- Direction
- greatere4
- Comparator
- GR cultivarse4
- Setting
- IRR or high yield environmente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the early soybean [ Glycine max (L.) Merr.] production system”
e4“Use of CONV vs. GR cultivars resulted in greater profit in an IRR or high yield environment”
Claim · model-written summary
The authors recommend GR cultivars with POST‐only weed management for greater profit in a non-irrigated environment.
- Taxon
- soybeanGlycine maxe0
- Outcome
- greater profite5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the early soybean [ Glycine max (L.) Merr.] production system”
e5“will result in greater profit in an NI environment”
The same questions in other papers
herbicide · yield · Glycine max (soybean)Positive and negative results
321 papers in the same direction as this paper · 112 in the opposite direction · 26 reporting no difference from an alternative
- negative
- no effect
- negative
456 papers more in this group
See all 460 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.