Abstract
On-farm experiments were conducted to evaluate the performance of site-specific nutrient management (SSNM) of cassava (Manihot esculenta Crantz) in five important soil series of Thiruvananthapuram district in Kerala, during 2011–12 and 2012–13. Field and crop-specific NPK rates were calculated using quantitative evaluation of fertility of tropical soils (QUEFTS) model. Tuberous root yield increased significantly in SSNM treatment compared to FFP in all five soil series studied. Above 5 tonnes/ha yield increase was observed in SSNM treatment in all soil series compared to FFP treatment. The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series. Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP. The SSNM treatment led to a reduction of average fertilizer cost ( 5, 240 crop/ha) and an increase in gross return above fertilizer cost ( 10, 9, 880 crop/ha) compared with FFP.
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Claims 16
Claim · model-written summary
SSNM significantly increased cassava tuberous root yield compared with FFP in all five soil series.
- Taxon
- cassava (Manihot esculenta Crantz)
Manihot esculentat0 - Treatment
- SSNM treatmente0
- Outcome
- Tuberous root yielde0
- Direction
- increasede0
- Qualifier
- all five soil seriese0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tuberous root yield increased significantly in SSNM treatment compared to FFP in all five soil series studied.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased cassava yield by above 5 tonnes/ha compared with FFP across all soil series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- yielde0
- Direction
- increasee0
- Value
- Above 5 tonnes/hae0
- Comparator
- FFP treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Above 5 tonnes/ha yield increase was observed in SSNM treatment in all soil series compared to FFP treatment.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased N uptake by 22.3 kg/ha versus FFP in Thiruvanathapuram series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- nutrient uptakee0
- Direction
- increasee0
- Value
- 22.3 kg/hae0
- Comparator
- FFPe0
- Setting
- Thiruvanathapuram seriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased P uptake by 3.3 kg/ha versus FFP in Thiruvanathapuram series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- nutrient uptakee0
- Direction
- increasee0
- Value
- 3.3 kg/hae0
- Comparator
- FFPe0
- Setting
- Thiruvanathapuram seriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased K uptake by 17.9 kg/ha versus FFP in Thiruvanathapuram series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- nutrient uptakee0
- Direction
- increasee0
- Value
- 17.9 kg/hae0
- Comparator
- FFPe0
- Setting
- Thiruvanathapuram seriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased N uptake by 27.9 kg/ha versus FFP in Vellayani series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- nutrient uptakee0
- Direction
- increasee0
- Value
- 27.9 kg/hae0
- Comparator
- FFPe0
- Setting
- Vellayani seriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased P uptake by 1.9 kg/ha versus FFP in Vellayani series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- nutrient uptakee0
- Direction
- increasee0
- Value
- 1.9 kg/hae0
- Comparator
- FFPe0
- Setting
- Vellayani seriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased K uptake by 8.7 kg/ha versus FFP in Vellayani series.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- nutrient uptakee0
- Direction
- increasee0
- Value
- 8.7 kg/hae0
- Comparator
- FFPe0
- Setting
- Vellayani seriese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nutrient uptake was maximum in Thiruvanathapuram series (22.3 kg/ha, 3.3 kg/ha and 17.9 kg/ha N P and K uptake increase in SSNM treatment than FFP) and minimum nutrient uptake (27.9 kg/ha, 1.9 kg/ha and 8.7 kg/ha N P and K uptake increase in SSNM treatment than FFP) was observed in Vellayani series.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased N agronomic efficiency by 19 kg/kg relative to FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- agronomic efficiencye0
- Direction
- increasee0
- Value
- 19 kg/kge0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased P agronomic efficiency by 17 kg/kg relative to FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- agronomic efficiencye0
- Direction
- increasee0
- Value
- 17 kg/kge0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased K agronomic efficiency by 33 kg/kg relative to FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- agronomic efficiencye0
- Direction
- increasee0
- Value
- 33 kg/kge0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased N recovery efficiency by 0.14 kg/kg relative to FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- recovery efficiencye0
- Direction
- increasee0
- Value
- 0.14 kg/kge0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased P recovery efficiency by 0.06 kg/kg relative to FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- recovery efficiencye0
- Direction
- increasee0
- Value
- 0.06 kg/kge0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased K recovery efficiency by 0.14 kg/kg relative to FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- recovery efficiencye0
- Direction
- increasee0
- Value
- 0.14 kg/kge0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Large increase in nutrient-use efficiency parameters like agronomic efficiency (19 kg/kg, 17 kg/kg and 33 kg/kg N, P and K respectively) and recovery efficiency (0.14 kg/kg, 0.06 kg/kg and 0.14 kg/kg N, P and K respectively) was observed in SSNM treatment compared to FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM reduced average fertilizer cost versus FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- average fertilizer coste0
- Direction
- reductione0
- Value
- 5, 240 crop/hae0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SSNM treatment led to a reduction of average fertilizer cost ( 5, 240 crop/ha) and an increase in gross return above fertilizer cost ( 10, 9, 880 crop/ha) compared with FFP.”
t0“cassava (Manihot esculenta Crantz)”
Claim · model-written summary
SSNM increased gross return above fertilizer cost versus FFP.
- Taxon
- cassava (Manihot esculenta Crantz)Manihot esculentat0
- Treatment
- SSNM treatmente0
- Outcome
- gross return above fertilizer coste0
- Direction
- increasee0
- Value
- 10, 9, 880 crop/hae0
- Comparator
- FFPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The SSNM treatment led to a reduction of average fertilizer cost ( 5, 240 crop/ha) and an increase in gross return above fertilizer cost ( 10, 9, 880 crop/ha) compared with FFP.”
t0“cassava (Manihot esculenta Crantz)”
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