Abstract
Multiratoons (one plant + 3 ratoons) of 12 sugarcane varieties were grown in a tropical vertisol. Available N status of the soil declined by 26.3% at the end of the third ratoon crop despite application of recommended level of N (225 kg ha-') to each of the crops. Additional (25% extra) N application to ratoons registered higher soil available N level than the nonnal rate of application. Sugarcane varieties influenced the soil available Nstatus signiJicantly. In general, high yielding varieties (e.g. Co 8021, Co 8145, Co 8134, Co 6304), reduced the soil available N status greater than the low yielders (e.g. Co 8335, Co 8346). Tlze study indicated a decline in available N status by multiratooning. Additional N applicatiovts to ratoons and in situ trash mulching and incorporation helped to improve multiratoon productivity as well as soil available N status. Nitrogen balance studies indicated greater N losses under multiratooning system thus suggesting the need for appropriate N management practices to reduce N losses and improve N use eflciency. *
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Claims 10
Claim · model-written summary
Soil available N declined by 26.3% by the third sugarcane ratoon despite recommended N application.
Verbatim
e0“Available N status of the soil declined by 26.3% at the end of the third ratoon crop despite application of recommended level of N (225 kg ha-') to each of the crops”
t0“sugarcane”
Claim · model-written summary
Applying 25% extra N to ratoons raised soil available N relative to the normal rate.
Verbatim
e0“Additional (25% extra) N application to ratoons registered higher soil available N level than the nonnal rate of application”
t0“sugarcane”
Claim · model-written summary
Sugarcane variety significantly influenced soil available N status.
Not reportedDirection
Verbatim
e0“Sugarcane varieties influenced the soil available Nstatus signiJicantly”
Claim · model-written summary
High-yielding sugarcane varieties reduced soil available N more than low-yielding varieties.
Verbatim
e0“high yielding varieties (e.g. Co 8021, Co 8145, Co 8134, Co 6304), reduced the soil available N status greater than the low yielders (e.g. Co 8335, Co 8346)”
t0“sugarcane”
Claim · model-written summary
Additional N application improved multiratoon productivity.
- Taxon
- sugarcanet0
- Treatment
- Additional N applicatiovts to ratoonse0
- Outcome
- multiratoon productivitye0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“Additional N applicatiovts to ratoons and in situ trash mulching and incorporation helped to improve multiratoon productivity as well as soil available N status”
t0“sugarcane”
Claim · model-written summary
Additional N application improved soil available N status.
- Taxon
- sugarcanet0
- Treatment
- Additional N applicatiovts to ratoonse0
- Outcome
- soil available N statuse0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“Additional N applicatiovts to ratoons and in situ trash mulching and incorporation helped to improve multiratoon productivity as well as soil available N status”
t0“sugarcane”
Claim · model-written summary
In situ trash mulching and incorporation improved multiratoon productivity.
- Taxon
- sugarcanet0
- Treatment
- in situ trash mulching and incorporatione0
- Outcome
- multiratoon productivitye0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“Additional N applicatiovts to ratoons and in situ trash mulching and incorporation helped to improve multiratoon productivity as well as soil available N status”
t0“sugarcane”
Claim · model-written summary
In situ trash mulching and incorporation improved soil available N status.
- Taxon
- sugarcanet0
- Treatment
- in situ trash mulching and incorporatione0
- Outcome
- soil available N statuse0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“Additional N applicatiovts to ratoons and in situ trash mulching and incorporation helped to improve multiratoon productivity as well as soil available N status”
t0“sugarcane”
Claim · model-written summary
Nitrogen losses were greater under multiratooning.
Verbatim
e0“Nitrogen balance studies indicated greater N losses under multiratooning system”
t0“sugarcane”
Claim · model-written summary
The authors recommend N management to reduce N losses and improve N-use efficiency in sugarcane ratooning.
Verbatim
e0“suggesting the need for appropriate N management practices to reduce N losses and improve N use eflciency”
t0“sugarcane”
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