Abstract
Abstract Further studies on mineral nutrition of soybeans [ Glycine max (L.) Merrill] were needed for better understanding of the relationship between the nutrient contents of the grain and leaf tissue in relation to grain yield as influenced by N, P, and K fertilization. Field experiments with ‘Lee’ soybeans were conducted over a 3‐year period on a Calloway silt loam in southeast Arkansas to obtain data on the effects of various rates and combinations of N, P, and K (112 kg N/ha, 40 kg P/ha, and 75 kg K/ha) fertilizers on grain yield and on the elemental content of leaf tissue and the grain. Marked yield increases were obtained from N and K fertilizers and from various NPK combinations. Yield increases from N ranged from 10 to 15%, and from K, from 9 to 19%. Yield increases in 1967, 1968, and 1969 from NPK over the check were 32.8, 28.3, and 14.7%, respectively. Fertilizer application increased the N and K content of both the leaves and grain and depressed their Ca and Mg content. Soybean yield showed a positive correlation with the N and K and negative correlation with the Ca and Mg content of grain and leaf tissue. Elemental content of the leaf tissue declined with plant age.
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Claims 10
Claim · model-written summary
Nitrogen fertilizer increased soybean yield by 10 to 15%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield increases from N ranged from 10 to 15%”
t0“Soybeans”
t1“Soybeans”
Claim · model-written summary
Potassium fertilizer increased soybean yield by 9 to 19%.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“from K, from 9 to 19%”
t0“Soybeans”
t1“Soybeans”
e1“Yield increases from N ranged from 10 to 15%”
Claim · model-written summary
NPK raised yield over the check by 32.8% in 1967.
- Taxon
- soybeans
Glycine maxt0 - Treatment
- NPKe0
- Outcome
- Yielde0
- Direction
- increasese0
- Value
- 32.8e0
- Qualifier
- 1967e0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield increases in 1967, 1968, and 1969 from NPK over the check were 32.8, 28.3, and 14.7%, respectively”
t0“Soybeans”
t1“Soybeans”
Claim · model-written summary
NPK raised yield over the check by 28.3% in 1968.
- Taxon
- soybeansGlycine maxt0
- Treatment
- NPKe0
- Outcome
- Yielde0
- Direction
- increasese0
- Value
- 28.3e0
- Qualifier
- 1968e0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield increases in 1967, 1968, and 1969 from NPK over the check were 32.8, 28.3, and 14.7%, respectively”
t0“Soybeans”
t1“Soybeans”
Claim · model-written summary
NPK raised yield over the check by 14.7% in 1969.
- Taxon
- soybeansGlycine maxt0
- Treatment
- NPKe0
- Outcome
- Yielde0
- Direction
- increasese0
- Value
- 14.7%e0
- Qualifier
- 1969e0
- Comparator
- the checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield increases in 1967, 1968, and 1969 from NPK over the check were 32.8, 28.3, and 14.7%, respectively”
t0“Soybeans”
t1“Soybeans”
Claim · model-written summary
Fertilizer increased leaf and grain nitrogen and potassium content.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Fertilizer applicatione0
- Outcome
- N and K content of both the leaves and graine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer application increased the N and K content of both the leaves and grain”
t0“Soybeans”
t1“Soybeans”
Claim · model-written summary
Fertilizer depressed leaf and grain calcium and magnesium content.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Fertilizer applicatione1
- Outcome
- Ca and Mg contente0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“depressed their Ca and Mg content”
t0“Soybeans”
t1“Soybeans”
e1“Fertilizer application increased the N and K content of both the leaves and grain”
Claim · model-written summary
Soybean yield correlated positively with nitrogen and potassium in grain and leaves.
- Taxon
- SoybeanGlycine maxe0
- Organ / stage
- grain and leaf tissuee0
- Compound
- N and Ke0
- Outcome
- yielde0
- Direction
- positive correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield showed a positive correlation with the N and K and negative correlation with the Ca and Mg content of grain and leaf tissue”
Claim · model-written summary
Soybean yield correlated negatively with calcium and magnesium in grain and leaves.
- Taxon
- SoybeanGlycine maxe0
- Organ / stage
- grain and leaf tissuee0
- Compound
- Ca and Mge0
- Outcome
- yielde0
- Direction
- negative correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean yield showed a positive correlation with the N and K and negative correlation with the Ca and Mg content of grain and leaf tissue”
Claim · model-written summary
Leaf elemental content declined as plants aged.
- Taxon
- soybeansGlycine maxt0
- Organ / stage
- leaf tissuee0
- Outcome
- Elemental content of the leaf tissuee0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Elemental content of the leaf tissue declined with plant age”
t0“Soybeans”
t1“Soybeans”
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