Abstract
SUMMARY In a field experiment at Lucknow in 1985/87 and 1986/88, the ‘new’ N carriers urea super granules (USG), neem-cake-coated urea (NCU) and dicyandiamide-treated urea (DCD) and the traditional source of N, prilled urea (PU), were used to supply 150 kgN/ha to the plant crop (first crop after planting) of the cultivar Col 148. The ratoon crop was fertilized at 0 and 150 kgN/ha with PU over all the plant crop treatments. In both plant and ratoon crops, N application increased cane yields but decreased quality: differences in yield resulting from use of the new carriers were not significant, though the fertilizers tended to increase the final plant population density. Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU. The direct effect of N was 184 kg cane/kg of N applied to the ratoon crop but residual and cumulative effects of N applied to the plant crop on yield and quality of the ratoon crop were small. Adequate direct application of N is therefore suggested for increasing the yields of ratoon cane.
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Claims 14
Claim · model-written summary
Nitrogen application increased cane yields in plant and ratoon crops.
Not reportedComparator
Verbatim
e0“In both plant and ratoon crops, N application increased cane yields”
t0“sugarcane”
Claim · model-written summary
Nitrogen application decreased cane quality in plant and ratoon crops.
Not reportedComparator
Verbatim
e0“In both plant and ratoon crops, N application increased cane yields but decreased quality”
t0“sugarcane”
Claim · model-written summary
Yield differences among the new nitrogen carriers were not significant.
Not reportedComparatorDirection
Verbatim
e0“differences in yield resulting from use of the new carriers were not significant”
t0“sugarcane”
Claim · model-written summary
Fertilizers tended to increase final plant population density.
Not reportedComparator
Verbatim
e0“fertilizers tended to increase the final plant population density”
t0“sugarcane”
Claim · model-written summary
USG increased nitrogen uptake relative to PU.
Verbatim
e0“Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU”
t0“sugarcane”
Claim · model-written summary
NCU increased nitrogen uptake relative to PU.
Verbatim
e0“Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU”
t0“sugarcane”
Claim · model-written summary
DCD increased nitrogen uptake relative to PU.
Verbatim
e0“Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU”
t0“sugarcane”
Claim · model-written summary
USG increased nitrogen recovery relative to PU.
Verbatim
e0“Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU”
t0“sugarcane”
Claim · model-written summary
NCU increased nitrogen recovery relative to PU.
Verbatim
e0“Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU”
t0“sugarcane”
Claim · model-written summary
DCD increased nitrogen recovery relative to PU.
Verbatim
e0“Uptake and recovery of N were significantly greater using USG, NCU and DCD than using PU”
t0“sugarcane”
Claim · model-written summary
The direct nitrogen effect on ratoon cane was 184 kg cane per kg nitrogen applied.
Verbatim
e0“The direct effect of N was 184 kg cane/kg of N applied to the ratoon crop”
t0“sugarcane”
Claim · model-written summary
Residual nitrogen effects from the plant crop on ratoon yield were small.
Verbatim
e0“residual and cumulative effects of N applied to the plant crop on yield and quality of the ratoon crop were small”
t0“sugarcane”
Claim · model-written summary
Cumulative nitrogen effects from the plant crop on ratoon quality were small.
Verbatim
e0“residual and cumulative effects of N applied to the plant crop on yield and quality of the ratoon crop were small”
t0“sugarcane”
Claim · model-written summary
The authors recommend direct nitrogen application to increase ratoon cane yield.
Verbatim
e0“Adequate direct application of N is therefore suggested for increasing the yields of ratoon cane”
t0“sugarcane”
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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.