Abstract
Abstract An established two‐year‐old stand of ‘Apollo’ alfalfa (Medicago saliva L.) was used to determine the alfalfa yield and macronutrient contents response to potassium (K), sulfur (S), boron (B), and molybdenum (Mo) fertilization under a high yield environment. A split, split block field design was used with nine micronutrient treatments (0, 50, and 100 g Mo ha‐1 and 0, 1, and 2 kg B ha‐1) in a factorial arrangement (32) as the subplots and three K levels (150, 300, and 600 kg K ha‐1) as the main plot in three replications. Two levels of S (0 and 240 kg S ha‐1) fertilization were applied in strips across the main plots (K levels) resulting in the split, split block design. Alfalfa yield and macronutrient contests were determined. Increased in K or S rate increased K contents of the plants, however, the differences between the K or S rates were not significant and B or Mo application did not have a marked effect on alfalfa K levels. Alfalfa calcium (Ca), magnesium (Mg), or phosphorus (P) content was not significantly affected by K, S, B, or Mo fertilization. Potassium, S, B, or Mo fertilizer application also did not have a marked effect on alfalfa yield during this study. Combinations of K, S, B, and Mo fertilizer had variable effects and the effects were dependent on the combination of fertilizer, sources, and levels. With a few exceptions, there was lack of alfalfa yield and nutrient contents response to K, S, B, and Mo applications which was due to the effect of low available soil moisture as a result of low incident rainfall during the study on these nutrients availability, uptake, and alfalfa growth.
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Claims 6
Claim · model-written summary
Increasing K or S rate increased K contents of alfalfa, though differences between the rates were not significant.
- Taxon
- alfalfa
Medicago sativat0 - Treatment
- K or S ratee1
- Outcome
- K contents of the plantse1
- Direction
- Increasede1
- Comparator
- K or S ratese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa production”
e1“Increased in K or S rate increased K contents of the plants, however, the differences between the K or S rates were not significant”
Claim · model-written summary
Boron or molybdenum application had no marked effect on alfalfa K levels.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- B or Mo applicatione2
- Outcome
- alfalfa K levelse2
- Direction
- did not have a marked effecte2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa production”
e2“B or Mo application did not have a marked effect on alfalfa K levels”
Claim · model-written summary
Calcium, magnesium and phosphorus contents of alfalfa were not significantly affected by K, S, B or Mo fertilization.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- K, S, B, or Mo fertilizatione3
- Outcome
- calcium (Ca), magnesium (Mg), or phosphorus (P) contente3
- Direction
- not significantly affectede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa production”
e3“Alfalfa calcium (Ca), magnesium (Mg), or phosphorus (P) content was not significantly affected by K, S, B, or Mo fertilization”
Claim · model-written summary
Potassium, S, B or Mo fertilizer application had no marked effect on alfalfa yield.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- Potassium, S, B, or Mo fertilizer applicatione4
- Outcome
- alfalfa yielde4
- Direction
- did not have a marked effecte4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa production”
e4“Potassium, S, B, or Mo fertilizer application also did not have a marked effect on alfalfa yield during this study”
Claim · model-written summary
Combinations of K, S, B and Mo fertilizer had variable effects on alfalfa that depended on fertilizer source and level.
- Taxon
- alfalfaMedicago sativat0
- Treatment
- K, S, B, and Mo fertilizere5
- Outcome
- effectse5
- Qualifier
- dependent on the combination of fertilizer, sources, and levelse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa production”
e5“Combinations of K, S, B, and Mo fertilizer had variable effects and the effects were dependent on the combination of fertilizer, sources, and levels”
Claim · model-written summary
The lack of alfalfa yield and nutrient contents response was attributed to low available soil moisture from low rainfall.
- Taxon
- alfalfaMedicago sativat0
- Outcome
- yield and nutrient contents responsee6
- Qualifier
- low available soil moisturee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“alfalfa production”
e6“there was lack of alfalfa yield and nutrient contents response to K, S, B, and Mo applications which was due to the effect of low available soil moisture as a result of low incident rainfall during the study”
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