Abstract
The responses to fertilization and moisture of several of the principal grass species of the California annual type were measured in a field study in Southern California. Treatment plots were established in the grassland to examine the responses to a complete fertilizer. Comparisons were also made of grassland samples obtained in 2 years with different precipitation regimes. Fertilization increased the shoot weight of all species, but yield was increased for the brome species only. Oat species decreased in yield and numbers of shoots/m2. In shoot weight the bromes had a similar but lesser response to additional moisture than to fertilization. With additional moisture the oat species increased in yield and numbers of shoots/m2, but decreased in shoot weight. It is suggested that range management policies which increase nutrients or moisture might lead to an alteration of the composition of the annual grasslands.
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Claims 7
Claim · model-written summary
Fertilization increased the shoot weight of all grass species of the California annual type.
- Taxon
- grass species of the California annual typee0
- Treatment
- Fertilizatione1
- Outcome
- shoot weighte1
- Direction
- increasede1
- Setting
- Southern Californiae0
Not reportedComparator
Verbatim
e0“The responses to fertilization and moisture of several of the principal grass species of the California annual type were measured in a field study in Southern California”
e1“Fertilization increased the shoot weight of all species, but yield was increased for the brome species only. Oat species decreased in yield and numbers of shoots/m2”
Claim · model-written summary
Fertilization increased yield of brome species only.
- Taxon
- brome speciese1
- Treatment
- Fertilizatione1
- Outcome
- yielde1
- Direction
- increasede1
- Setting
- Southern Californiae0
Not reportedComparator
Verbatim
e0“The responses to fertilization and moisture of several of the principal grass species of the California annual type were measured in a field study in Southern California”
e1“Fertilization increased the shoot weight of all species, but yield was increased for the brome species only. Oat species decreased in yield and numbers of shoots/m2”
Claim · model-written summary
Fertilization decreased yield and numbers of shoots per square metre in oat species.
- Taxon
- Oat species
Avena sativae1 - Treatment
- Fertilizatione1
- Outcome
- yield and numbers of shoots/m2e1
- Direction
- decreasede1
- Setting
- Southern Californiae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The responses to fertilization and moisture of several of the principal grass species of the California annual type were measured in a field study in Southern California”
e1“Fertilization increased the shoot weight of all species, but yield was increased for the brome species only. Oat species decreased in yield and numbers of shoots/m2”
Claim · model-written summary
In brome species, the shoot weight response to additional moisture was similar to but lesser than the response to fertilization.
Verbatim
e3“In shoot weight the bromes had a similar but lesser response to additional moisture than to fertilization”
Claim · model-written summary
With additional moisture, oat species increased yield and numbers of shoots per square metre.
- Taxon
- oat speciesAvena sativae4
- Treatment
- additional moisturee4
- Outcome
- yield and numbers of shoots/m2e4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“With additional moisture the oat species increased in yield and numbers of shoots/m2, but decreased in shoot weight”
Claim · model-written summary
With additional moisture, oat species decreased in shoot weight.
- Taxon
- oat speciesAvena sativae4
- Treatment
- additional moisturee4
- Outcome
- shoot weighte4
- Direction
- decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“With additional moisture the oat species increased in yield and numbers of shoots/m2, but decreased in shoot weight”
Claim · model-written summary
Range management policies that increase nutrients or moisture might alter the composition of annual grasslands.
Verbatim
e5“It is suggested that range management policies which increase nutrients or moisture might lead to an alteration of the composition of the annual grasslands”
The same questions in other papers
fertilization · yield · Avena sativa (oats)Positive and negative results
16 papers in the same direction as this paper · 143 in the opposite direction
- positive
- positive
- positive
156 papers more in this group
See all 160 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.