Abstract
Short-duration (6-7 months) cassava ( Manihot esculenta Crantz) enables better utilization of resources and crop diversification than the normal duration crop (9-10 months). Field experiments were conducted for three years (2004-2007) at Thiruvananthapuram, Kerala, in a lowland situation akin to rice fallow to standardise nutrient management practices for short-duration cassava. Five short-duration cassava lines (Vellayani Hraswa, Kalpaka, Sree Jaya, Sree Vijaya and triploid 2-18) were evaluated under 4 levels of fertility (12.5 t FYM (100%)+ NPK, 75% FYM + NPK, 50% FYM + NPK and NPK fertilization based on soil test data) in split plot design with 3 replications. Triploid 2-18 yielded significantly higher fresh tubers (28.45 t/ha) than other four cultivars. The high yielders pro- duced appreciably taller plants and more leaves, higher total and tuber biomass. Nutrient management based on soil test data for organic C, available P and K status along with 12.5 t/FYM, which resulted in the saving of full P, 10% N and 15% K by the third year, promoted plant height, leaf production and nutrient uptake, produced higher tuber yield (24.18 t/ha), tuber and total biomass, dry matter and starch content of tubers besides maintaining or- ganic C, available N, P and K status of the soil, leading to positive nutrient balance.
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Claims 7
Claim · model-written summary
Triploid 2-18 had higher fresh tuber yield than four cultivars.
- Taxon
- cassava
Manihot esculentat0 - Material
- Triploid 2-18e0
- Outcome
- fresh tuberse0
- Direction
- highere0
- Value
- 28.45 t/hae0
- Comparator
- other four cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Triploid 2-18 yielded significantly higher fresh tubers (28.45 t/ha) than other four cultivars”
t0“cassava”
Claim · model-written summary
High yielding cassava lines had taller plants, more leaves, and higher biomass.
- Taxon
- cassavaManihot esculentat0
- Material
- high yielderse0
- Outcome
- taller plants and more leaves, higher total and tuber biomasse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The high yielders pro- duced appreciably taller plants and more leaves, higher total and tuber biomass”
t0“cassava”
Claim · model-written summary
Soil-test nutrient management saved P, N and K fertilizer by the third year.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Nutrient management based on soil test datae1
- Outcome
- Pe0
- Direction
- savinge0
- Value
- full Pe0
- Qualifier
- by the third yeare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“saving of full P, 10% N and 15% K by the third year”
e1“Nutrient management based on soil test data”
t0“cassava”
Claim · model-written summary
Soil-test nutrient management promoted plant height, leaf production and nutrient uptake.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Nutrient management based on soil test datae0
- Outcome
- plant height, leaf production and nutrient uptakee0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nutrient management based on soil test data for organic C, available P and K status along with 12.5 t/FYM, which resulted in the saving of full P, 10% N and 15% K by the third year, promoted plant height, leaf production and nutrient uptake”
t0“cassava”
Claim · model-written summary
Soil-test nutrient management produced higher tuber yield.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Nutrient management based on soil test datae1
- Outcome
- tuber yielde0
- Direction
- highere0
- Value
- 24.18 t/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“produced higher tuber yield (24.18 t/ha)”
e1“Nutrient management based on soil test data”
t0“cassava”
Claim · model-written summary
Soil-test management raised biomass, dry matter and tuber starch content.
- Taxon
- cassavaManihot esculentat0
- Treatment
- Nutrient management based on soil test datae2
- Outcome
- tuber and total biomass, dry matter and starch content of tuberse1
- Direction
- highere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tuber and total biomass, dry matter and starch content of tubers”
e1“produced higher tuber yield (24.18 t/ha), tuber and total biomass, dry matter and starch content of tubers”
e2“Nutrient management based on soil test data”
t0“cassava”
Claim · model-written summary
Soil-test management maintained soil organic C and available N, P and K and led to positive nutrient balance.
- Taxon
- cassavaManihot esculentat0
- Outcome
- available N, P and K status of the soile0
- Direction
- maintaininge0
- Qualifier
- positive nutrient balancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maintaining or- ganic C, available N, P and K status of the soil, leading to positive nutrient balance”
t0“cassava”
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