Abstract
Under rainfed Mediterranean conditions the dominant crops are cereals and legumes, with the most common crops being barley ( Hordeum vulgare ) and vetch ( Vicia sativa ). These two species are grown in rotation, where the cycle length depends on the productivity and the value of the products in the market. In order to study the productivity of cereals and legumes growing in various rotation combinations, an experiment was conducted during the 1982–2000 period, at Athalassa. The experimental site had a calcareous soil and is located in the central plane of Cyprus. The average rainfall is 250 mm per year. The rotation treatments tested were: (a) continuous barley, (b) continuous vetch, (c) vetch–barley, (d) vetch–barley–barley, (e) vetch–vetch–barley–barley and (f) vetch–vetch–vetch–barley–barley. Barley plots were equally divided to accommodate two rates of N fertilizer (0 and 60 kg N/ha) which were applied at seeding. Production of both vetch and barley was lower in monocultures than when the two species were grown in rotation. Vetch yield was similar in all rotations, irrespective of the position in the cycle. Productivity of barley was increased by nitrogen application only when grown as a second barley after vetch. However, in years with low productivity due to the rainfall amount and distribution, barley did not respond to nitrogen application. The first crop of barley after vetch gave maximum production without any nitrogen fertilizer application. Nitrogen fertilizer had a decreasing effect on the size and weight of barley grains. These results enable the farmers to select any of the rotation systems studied, based on the economics of the two species, without risking productivity. Nitrogen fertilizer should be applied only to the second crop after vetch in years with high rainfall.
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Claims 8
Claim · model-written summary
Production of vetch and barley was lower in monocultures than when grown in rotation.
Verbatim
e1“Production of both vetch and barley was lower in monocultures than when the two species were grown in rotation”
Claim · model-written summary
Vetch yield was similar in all rotations, irrespective of the position in the cycle.
Verbatim
e2“Vetch yield was similar in all rotations, irrespective of the position in the cycle”
Claim · model-written summary
Barley productivity was increased by nitrogen application only when barley was grown as a second crop after vetch.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree3 - Treatment
- nitrogen applicatione3
- Outcome
- Productivitye3
- Direction
- increasede3
- Qualifier
- only when grown as a second barley after vetche3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e3“Productivity of barley was increased by nitrogen application only when grown as a second barley after vetch”
Claim · model-written summary
In years with low productivity due to rainfall, barley did not respond to nitrogen application.
- Taxon
- barleyHordeum vulgaree5
- Treatment
- nitrogen applicatione5
- Outcome
- productivitye5
- Direction
- did not responde5
- Qualifier
- in years with low productivity due to the rainfall amount and distributione5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“in years with low productivity due to the rainfall amount and distribution, barley did not respond to nitrogen application”
Claim · model-written summary
The first barley crop after vetch gave maximum production without any nitrogen fertilizer application.
- Taxon
- barleyHordeum vulgaree6
- Treatment
- without any nitrogen fertilizer applicatione6
- Outcome
- productione6
- Direction
- maximume6
- Qualifier
- first crop of barley after vetche6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The first crop of barley after vetch gave maximum production without any nitrogen fertilizer application”
Claim · model-written summary
Nitrogen fertilizer had a decreasing effect on the size and weight of barley grains.
- Taxon
- barleyHordeum vulgaree7
- Organ / stage
- grainse7
- Treatment
- Nitrogen fertilizere7
- Outcome
- size and weight of barley grainse7
- Direction
- decreasinge7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Nitrogen fertilizer had a decreasing effect on the size and weight of barley grains”
Claim · model-written summary
The results allow farmers to select any of the rotation systems studied, based on economics, without risking productivity.
- Taxon
- barleyHordeum vulgaree0
- Outcome
- select any of the rotation systems studiede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley ( Hordeum vulgare )”
e1“These results enable the farmers to select any of the rotation systems studied, based on the economics of the two species, without risking productivity”
Claim · model-written summary
Nitrogen fertilizer should be applied only to the second crop after vetch in years with high rainfall.
- Taxon
- barleyHordeum vulgaree0
- Treatment
- second crop after vetche1
- Outcome
- Nitrogen fertilizer should be appliede1
- Qualifier
- in years with high rainfalle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“barley ( Hordeum vulgare )”
e1“Nitrogen fertilizer should be applied only to the second crop after vetch in years with high rainfall”
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