Abstract
Abstract Alfalfa is rapidly increasing as a cash forage crop on the more arable soils in south central Missouri. These soils are natively acid and low in fertility having formed from loamy, sandy and cherty alluvium found in the bottom land areas, under forest vegetation with native grasses in the open areas. The two experimental sites selected were recently established alfalfa stands, Site I was under irrigation and Site II nonirrigated. Two S materials (SO4‐S and elemental S) at rates of 0, 34 and 68 kg S ha‐1 in 4 replications were applied. Yields, plant S, crude protein and IVDMD were measured for individual harvests in 1980 and 1981. Alfalfa yields were not increased at both locations with S fertilization. Forage S content was significantly increased and the N/S ratio significantly decreased on the higher yielding irrigated alfalfa, but not with the nonirrigated alfalfa. Forage S levels of 0.19% S and N/S ratio of 17.9 during dry year did not result in yield increase when S fertilized. There was observed a significant relationship between plant S and IVDMD and crude protein, but this relationship was not consistent. Variations in IVDMD levels were significantly related to crude protein content. The available SO4‐S level of 6.7 ppm appears adequate for alfalfa on these soils.
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Claims 10
Claim · model-written summary
Sulfur fertilization did not increase alfalfa yield at either site.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- S fertilizatione0
- Outcome
- Alfalfa yieldse0
- Direction
- not increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Alfalfa yields were not increased at both locations with S fertilization.”
t0“alfalfa”
Claim · model-written summary
Forage sulfur content increased significantly in irrigated alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- Forage S contente0
- Direction
- increasede0
- Setting
- irrigated alfalfae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage S content was significantly increased and the N/S ratio significantly decreased on the higher yielding irrigated alfalfa, but not with the nonirrigated alfalfa.”
Claim · model-written summary
The forage N/S ratio decreased significantly in irrigated alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Outcome
- N/S ratioe0
- Direction
- decreasede0
- Setting
- irrigated alfalfae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage S content was significantly increased and the N/S ratio significantly decreased on the higher yielding irrigated alfalfa, but not with the nonirrigated alfalfa.”
Claim · model-written summary
Sulfur fertilization did not increase forage sulfur content in nonirrigated alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- S fertilizatione1
- Outcome
- Forage S contente0
- Direction
- not with the nonirrigated alfalfae0
- Setting
- nonirrigated alfalfae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage S content was significantly increased and the N/S ratio significantly decreased on the higher yielding irrigated alfalfa, but not with the nonirrigated alfalfa.”
e1“S fertilization”
Claim · model-written summary
Sulfur fertilization did not decrease the forage N/S ratio in nonirrigated alfalfa.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- S fertilizatione1
- Outcome
- N/S ratioe0
- Direction
- not with the nonirrigated alfalfae0
- Setting
- nonirrigated alfalfae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage S content was significantly increased and the N/S ratio significantly decreased on the higher yielding irrigated alfalfa, but not with the nonirrigated alfalfa.”
e1“S fertilization”
Claim · model-written summary
During a dry year, fertilization did not increase yield despite forage sulfur of 0.19% and an N/S ratio of 17.9.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- S fertilizede0
- Outcome
- yielde0
- Direction
- did not result in yield increasee0
- Qualifier
- during dry yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forage S levels of 0.19% S and N/S ratio of 17.9 during dry year did not result in yield increase when S fertilized.”
t0“alfalfa”
Claim · model-written summary
Plant sulfur was significantly related to IVDMD, inconsistently.
- Taxon
- alfalfaMedicago sativat0
- Compound
- plant Se0
- Outcome
- IVDMDe0
- Qualifier
- not consistente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was observed a significant relationship between plant S and IVDMD and crude protein, but this relationship was not consistent.”
t0“alfalfa”
Claim · model-written summary
Plant sulfur was significantly related to crude protein, inconsistently.
- Taxon
- alfalfaMedicago sativat0
- Compound
- plant Se0
- Outcome
- crude proteine0
- Qualifier
- not consistente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was observed a significant relationship between plant S and IVDMD and crude protein, but this relationship was not consistent.”
t0“alfalfa”
Claim · model-written summary
IVDMD variation was significantly related to crude protein content.
- Taxon
- alfalfaMedicago sativat0
- Compound
- crude protein contente0
- Outcome
- IVDMD levelse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variations in IVDMD levels were significantly related to crude protein content.”
t0“alfalfa”
Claim · model-written summary
Available sulfate sulfur of 6.7 ppm appears adequate for alfalfa on these soils.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- appears adequatee0
- Value
- 6.7 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The available SO4‐S level of 6.7 ppm appears adequate for alfalfa on these soils.”
t0“alfalfa”
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