Abstract
Conservation agriculture (CA) practice increases agronomic productivity and soil fertility, yet CA stimulate nitrogen (N) immobilization and weed interference during the early periods of implementation. This study focuses on efficient N management by soil testing and optical sensor (GreenSeekerTM) information; and weed management using brown manuring (Sesbania aculeata co-culture) and herbicide mixtures under CA-based maize (Zea mays L.) – wheat (Triticum aestivum L. emend Fiori & Paol) system in the Indo-Gangetic Plains. Fertilizer N application guided by the optical sensor increased grain yields of maize and wheat up to 20 and 14% (average of two years), respectively, compared to whole N application at sowing. Weed management using brown manuring in maize and herbicide mixtures in wheat increased the grain yields up to 10 and 21%, respectively, over the weedy check. The optical sensor-based N management saved up to 45 and 30 kg N ha–1 of the optimized N fertilizer rate in maize and wheat, respectively, over whole N application. Fertilizer N management coupled with brown manuring resulted in 5 and 4% higher soil organic carbon accumulation. Implementing efficient N fertilizer and weed management in the early years of CA can improve agronomic yield, fertilizer savings, and soil organic carbon content.
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Claims 7
Claim · model-written summary
Sensor-guided nitrogen application raised maize grain yield by up to 20% compared with whole application at sowing.
- Treatment
- Fertilizer N application guided by the optical sensore0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 20e0
- Comparator
- whole N application at sowinge0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N application guided by the optical sensor increased grain yields of maize and wheat up to 20 and 14% (average of two years), respectively, compared to whole N application at sowing”
Claim · model-written summary
Sensor-guided nitrogen application raised wheat grain yield by up to 14% compared with whole application at sowing.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Fertilizer N application guided by the optical sensore0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 14%e0
- Comparator
- whole N application at sowinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer N application guided by the optical sensor increased grain yields of maize and wheat up to 20 and 14% (average of two years), respectively, compared to whole N application at sowing”
Claim · model-written summary
Brown manuring increased maize grain yield by up to 10% over the weedy check.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed management using brown manuring in maize and herbicide mixtures in wheat increased the grain yields up to 10 and 21%, respectively, over the weedy check”
Claim · model-written summary
Herbicide mixtures increased wheat grain yield by up to 21% over the weedy check.
- Taxon
- wheatTriticum aestivume0
- Treatment
- herbicide mixturese0
- Outcome
- grain yieldse0
- Direction
- increasede0
- Value
- 21%e0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Weed management using brown manuring in maize and herbicide mixtures in wheat increased the grain yields up to 10 and 21%, respectively, over the weedy check”
Claim · model-written summary
Sensor-guided management saved up to 45 kg N ha–1 in maize.
- Treatment
- optical sensor-based N managemente0
- Outcome
- optimized N fertilizer ratee0
- Direction
- savede0
- Value
- 45e0
- Comparator
- whole N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optical sensor-based N management saved up to 45 and 30 kg N ha–1 of the optimized N fertilizer rate in maize and wheat, respectively, over whole N application”
Claim · model-written summary
Sensor-guided management saved up to 30 kg N ha–1 in wheat.
- Taxon
- wheatTriticum aestivume0
- Treatment
- optical sensor-based N managemente0
- Outcome
- optimized N fertilizer ratee0
- Direction
- savede0
- Value
- 30 kg N ha–1e0
- Comparator
- whole N applicatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optical sensor-based N management saved up to 45 and 30 kg N ha–1 of the optimized N fertilizer rate in maize and wheat, respectively, over whole N application”
Claim · model-written summary
Fertilizer management with brown manuring increased soil organic carbon accumulation by 5% and 4%.
Verbatim
e0“Fertilizer N management coupled with brown manuring resulted in 5 and 4% higher soil organic carbon accumulation”
t0“maize-wheat system”
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See all 3,908 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.