Abstract
Seed and forage yields of three barley cultivars (Hordeum vulgare L.) grown on the same land for 4 yr after fallow without fertilizer declined annually by 12–15%. Decline in yield occurred also with moderate to high rates of fertilization (335 and 670 kg/ha of 10-4-8) in high yielding years but not in low yielding years. Under continuous cropping, the osil NO 3 -N increased, the pH and NaHCO 3 -extractable P remained at the same general level, and exchangeable K decreased. The decrease in yields after the first barley crop on fallow land was accompanied generally by a decrease in foliage N and K concentration and some increase in the P concentration. Disease prevalence varied each year but, with the possible exception of leaf spot caused by Cochliobolus sativus (Ito & Kurib.) Drechsl. ex Dastur, did not increase with continuous cropping. Loose smut Ustilago nuda (Jens.) Rostr.) increased rapidly for 2 yr on the cultivar York and then decreased. It appeared to be affected more by weather conditions than by number of years in continuous barley.
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Claims 10
Claim · model-written summary
Seed and forage yields of three barley cultivars grown on the same land for 4 yr after fallow without fertilizer declined annually by 12-15%.
- Taxon
- barley
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Hordeum vulgaree0 - Treatment
- grown on the same land for 4 yr after fallow without fertilizere0
- Outcome
- Seed and forage yieldse0
- Direction
- declinede0
- Value
- 12–15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Seed and forage yields of three barley cultivars (Hordeum vulgare L.) grown on the same land for 4 yr after fallow without fertilizer declined annually by 12–15%”
Claim · model-written summary
Yield decline in continuous barley also occurred with moderate to high fertilization in high yielding years but not in low yielding years.
- Taxon
- BARLEYHordeum vulgaret0
- Treatment
- moderate to high rates of fertilization (335 and 670 kg/ha of 10-4-8)e0
- Outcome
- Decline in yielde0
- Qualifier
- in high yielding years but not in low yielding yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Decline in yield occurred also with moderate to high rates of fertilization (335 and 670 kg/ha of 10-4-8) in high yielding years but not in low yielding years”
t0“BARLEY”
Claim · model-written summary
Under continuous cropping soil nitrate-N increased.
- Taxon
- BARLEYHordeum vulgaret0
- Treatment
- continuous croppinge0
- Outcome
- osil NO 3 -Ne0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under continuous cropping, the osil NO 3 -N increased”
t0“BARLEY”
Claim · model-written summary
Under continuous cropping soil pH and NaHCO3-extractable P remained at the same general level.
- Taxon
- BARLEYHordeum vulgaret0
- Outcome
- pH and NaHCO 3 -extractable Pe0
- Direction
- remained at the same general levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the pH and NaHCO 3 -extractable P remained at the same general level”
t0“BARLEY”
Claim · model-written summary
Under continuous cropping soil exchangeable K decreased.
- Taxon
- BARLEYHordeum vulgaret0
- Outcome
- exchangeable Ke0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exchangeable K decreased”
t0“BARLEY”
Claim · model-written summary
The yield decrease after the first barley crop on fallow land was generally accompanied by decreased foliage N and K concentration.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- foliage N and K concentratione0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in yields after the first barley crop on fallow land was accompanied generally by a decrease in foliage N and K concentration”
Claim · model-written summary
The yield decrease after the first barley crop was accompanied by some increase in foliage P concentration.
- Taxon
- BARLEYHordeum vulgaret0
- Outcome
- the P concentratione0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some increase in the P concentration”
t0“BARLEY”
Claim · model-written summary
Disease prevalence varied each year and, with the possible exception of leaf spot caused by Cochliobolus sativus, did not increase with continuous cropping.
- Taxon
- BARLEYHordeum vulgaret0
- Treatment
- continuous croppinge0
- Interactor
- Cochliobolus sativus
Bipolaris sorokinianae0pathogen - Outcome
- Disease prevalencee0
- Direction
- did not increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Disease prevalence varied each year but, with the possible exception of leaf spot caused by Cochliobolus sativus (Ito & Kurib.) Drechsl. ex Dastur, did not increase with continuous cropping”
t0“BARLEY”
Claim · model-written summary
Loose smut increased rapidly for 2 yr on the barley cultivar York and then decreased.
- Taxon
- BARLEYHordeum vulgaret0
- Material
- Yorke0
- Interactor
- Ustilago nuda
Ustilago nudae0pathogen - Outcome
- increased rapidly for 2 yre0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ustilago nuda (Jens.) Rostr.) increased rapidly for 2 yr on the cultivar York and then decreased”
t0“BARLEY”
Claim · model-written summary
Loose smut appeared to be affected more by weather conditions than by the number of years in continuous barley.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- weather conditionse0
- Outcome
- affectede0
- Comparator
- number of years in continuous barleye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It appeared to be affected more by weather conditions than by number of years in continuous barley”
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See all 550 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.