Abstract
Soils were examined from six major agricultural regions in Saudi Arabia. Most of the 30 soils were irrigated, all contained low organic matter and had pH values in excess of 8 units. A record was made of the previous crops and those standing in the field, along with the most recently applied fertilisers. In half of the soils, 4 spores g-1 soil were recorded and 1 to 2 spores in the remainder. Only two samples were found to be free of spores. All extracts were infective on maize, producing secondary spores after 10 weeks' growth. Soils left fallow for different periods of time showed a wide range of spore populations that were infective. Most extracted spores belonged to the genus Glomus and six species were identified. On onion, spores from the agricultural soils stimulated plant growth. It is suggested that Saudi Arabian soils contain populations of mycorrhizal species that may be exploited as biofertilisers.
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Claims 7
Claim · model-written summary
In half of the Saudi Arabian agricultural soils, 4 spores per gram of soil were recorded.
Not reportedTaxon
Verbatim
e0“Soils were examined from six major agricultural regions in Saudi Arabia”
e1“In half of the soils, 4 spores g-1 soil were recorded and 1 to 2 spores in the remainder”
Claim · model-written summary
In the remaining soils 1 to 2 spores per gram of soil were recorded.
Not reportedTaxon
Verbatim
e0“Soils were examined from six major agricultural regions in Saudi Arabia”
e1“In half of the soils, 4 spores g-1 soil were recorded and 1 to 2 spores in the remainder”
Claim · model-written summary
Only two of the soil samples were free of spores.
Not reportedTaxon
Verbatim
e0“Soils were examined from six major agricultural regions in Saudi Arabia”
e1“Only two samples were found to be free of spores”
Claim · model-written summary
Extracts from the soils were infective on maize and produced secondary spores after 10 weeks of growth.
- Outcome
- producing secondary sporese2
Zea mays
GlomusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“All extracts were infective on maize, producing secondary spores after 10 weeks' growth”
e3“Most extracted spores belonged to the genus Glomus and six species were identified”
Claim · model-written summary
Six Glomus species were identified among the extracted spores.
- Outcome
- six species were identifiede3
Not reportedTaxon
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Most extracted spores belonged to the genus Glomus and six species were identified”
Claim · model-written summary
Spore populations from soils left fallow for different periods were a wide range and were infective.
- Outcome
- spore populations that were infectivee4
- Qualifier
- Soils left fallow for different periods of timee4
Not reportedTaxon
Verbatim
e4“Soils left fallow for different periods of time showed a wide range of spore populations that were infective”
Claim · model-written summary
Spores from the agricultural soils stimulated onion plant growth.
- Taxon
- onion
Allium cepae5 - Treatment
- spores from the agricultural soilse5
- Outcome
- plant growthe5
- Direction
- stimulatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“On onion, spores from the agricultural soils stimulated plant growth”