Abstract
Abstract Yields and evapotranspiration rates by corn grown in Gardena loam at two levels of soil moisture, two plant densities, and several rates of N fertilization were studied for two growing seasons. Neither N fertilizer nor plant density influenced yields in the nonirrigated treatment, but in the irrigated treatment corn yields in both plant densities increased when N fertilizer was applied. Measurements made on the number of kernels per square foot, and individual kernel weights showed that grain yields were most influenced by the number of kernels produced per unit area. Neither N fertilizer nor plant density appreciably affected the evapotranspiration rate. Evapotranspiration was considerably greater for the irrigation plots than for the nonirrigation plots. Rates of evapotranspiration were higher in 1957 than in 1956. The pounds of dry matter produced per inch of water used in evapotranspiration (water‐use efficiency) was appreciably increased by using a high plant density and N fertilizer. This effect was much less marked in the nonirrigated treatments than in the irrigated. The amount of dry matter produced per inch of water used was greater on the nonirrigated treatment than on the irrigated treatment, except at the high N rate in the high plant density. It is apparent that if maximum efficiency of moisture use is to be realized, adequate fertilizer and plant densities are required.
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Claims 13
Claim · model-written summary
N fertilizer did not influence corn yields in the nonirrigated treatment.
- Taxon
- Corn
Zea mays subsp. mayst0 - Treatment
- N fertilizere0
- Outcome
- yieldse0
- Direction
- no_changeinferrede0
- Qualifier
- nonirrigated treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither N fertilizer nor plant density influenced yields in the nonirrigated treatment”
t0“Corn”
Claim · model-written summary
Plant density did not influence corn yields in the nonirrigated treatment.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- plant densitye0
- Outcome
- yieldse0
- Direction
- no_changeinferrede0
- Qualifier
- nonirrigated treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither N fertilizer nor plant density influenced yields in the nonirrigated treatment”
t0“Corn”
Claim · model-written summary
In the irrigated treatment, corn yields increased in both plant densities when N fertilizer was applied.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- N fertilizere0
- Outcome
- corn yieldse0
- Direction
- increasede0
- Qualifier
- irrigated treatmente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the irrigated treatment corn yields in both plant densities increased when N fertilizer was applied”
t0“Corn”
Claim · model-written summary
Grain yields were most influenced by the number of kernels produced per unit area.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- grain yieldse0
- Qualifier
- most influenced by the number of kernels produced per unit areae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain yields were most influenced by the number of kernels produced per unit area”
t0“Corn”
Claim · model-written summary
N fertilizer did not appreciably affect the corn evapotranspiration rate.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- N fertilizere0
- Outcome
- evapotranspiration ratee0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither N fertilizer nor plant density appreciably affected the evapotranspiration rate”
t0“Corn”
Claim · model-written summary
Plant density did not appreciably affect the corn evapotranspiration rate.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- plant densitye0
- Outcome
- evapotranspiration ratee0
- Direction
- no_changeinferrede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither N fertilizer nor plant density appreciably affected the evapotranspiration rate”
t0“Corn”
Claim · model-written summary
Evapotranspiration was considerably greater for irrigation plots than for nonirrigation plots.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- irrigation plotse0
- Outcome
- Evapotranspiratione0
- Direction
- greatere0
- Comparator
- nonirrigation plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Evapotranspiration was considerably greater for the irrigation plots than for the nonirrigation plots”
t0“Corn”
Claim · model-written summary
Rates of evapotranspiration were higher in 1957 than in 1956.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- Rates of evapotranspiratione0
- Direction
- highere0
- Qualifier
- 1957e0
- Comparator
- 1956e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rates of evapotranspiration were higher in 1957 than in 1956”
t0“Corn”
Claim · model-written summary
Water-use efficiency (dry matter per inch of water used in evapotranspiration) was appreciably increased by using a high plant density.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- a high plant densitye1
- Outcome
- pounds of dry matter produced per inch of water used in evapotranspiratione0
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pounds of dry matter produced per inch of water used in evapotranspiration”
e1“was appreciably increased by using a high plant density and N fertilizer”
t0“Corn”
Claim · model-written summary
Water-use efficiency (dry matter per inch of water used in evapotranspiration) was appreciably increased by N fertilizer.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- N fertilizere1
- Outcome
- pounds of dry matter produced per inch of water used in evapotranspiratione0
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The pounds of dry matter produced per inch of water used in evapotranspiration”
e1“was appreciably increased by using a high plant density and N fertilizer”
t0“Corn”
Claim · model-written summary
The increase in water-use efficiency was much less marked in the nonirrigated treatments than in the irrigated treatments.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- effecte0
- Direction
- less markede0
- Qualifier
- nonirrigated treatmentse0
- Comparator
- irrigatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This effect was much less marked in the nonirrigated treatments than in the irrigated”
t0“Corn”
Claim · model-written summary
Dry matter produced per inch of water used was greater on the nonirrigated than on the irrigated treatment, except at the high N rate in the high plant density.
- Taxon
- CornZea mays subsp. mayst0
- Treatment
- nonirrigated treatmente0
- Outcome
- amount of dry matter produced per inch of water usede0
- Direction
- greatere0
- Qualifier
- except at the high N rate in the high plant densitye0
- Comparator
- irrigated treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of dry matter produced per inch of water used was greater on the nonirrigated treatment than on the irrigated treatment, except at the high N rate in the high plant density”
t0“Corn”
Claim · model-written summary
Adequate fertilizer and plant densities are required if maximum efficiency of moisture use is to be realized.
- Taxon
- CornZea mays subsp. mayst0
- Outcome
- maximum efficiency of moisture usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“if maximum efficiency of moisture use is to be realized, adequate fertilizer and plant densities are required”
t0“Corn”
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