Abstract
For estimation of grain yield in wheat, Normalized Difference Vegetation Index (NDVI) is considered as a potential screening tool. Field experiments were conducted to scrutinize the response of NDVI to yield behavior of different wheat cultivars and nitrogen fertilization at agronomic research area, University of Agriculture Faisalabad (UAF) during the two years 2008-09 and 2009-10. For recording the value of NDVI, Green seeker (Handheld-505) was used. Split plot design was used as experimental model in, keeping four nitrogen rates (N1 = 0 kg ha(-1), N2 = 55 kg ha(-1), N3 = 110 kg ha(-1), and N4 = 220 kg ha(-1)) in main plots and ten wheat cultivars (Bakkhar-2001, Chakwal-50, Chakwal-97, Faisalabad-2008, GA-2002, Inqlab-91, Lasani-2008, Miraj-2008, Sahar-2006, and Shafaq-2006) in subplots with four replications. Impact of nitrogen and difference between cultivars were forecasted through NDVI. The results suggested that nitrogen treatment N4 (220 kg ha(-1)) and cultivar Faisalabad-2008 gave maximum NDVI value (0.85) at grain filling stage among all treatments. The correlation among NDVI at booting, grain filling, and maturity stages with grain yield was positive (R(2) = 0.90; R(2) = 0.90; R(2) = 0.95), respectively. So, booting, grain filling, and maturity can be good depictive stages during mid and later growth stages of wheat crop under agroclimatic conditions of Faisalabad and under similar other wheat growing environments in the country.
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Claims 6
Claim · model-written summary
Nitrogen rate N4 (220 kg ha(-1)) gave the maximum NDVI value (0.85) of wheat at grain filling among all treatments.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- grain filling stagee0
- Treatment
- nitrogen treatment N4 (220 kg ha(-1))e0
- Outcome
- NDVI valuee0
- Direction
- maximume0
- Value
- 0.85e0
- Comparator
- all treatmentse0
- Setting
- agronomic research area, University of Agriculture Faisalabad (UAF)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tool for Wheat Yield Estimation”
e0“nitrogen treatment N4 (220 kg ha(-1)) and cultivar Faisalabad-2008 gave maximum NDVI value (0.85) at grain filling stage among all treatments”
e1“agronomic research area, University of Agriculture Faisalabad (UAF)”
Claim · model-written summary
Wheat cultivar Faisalabad-2008 gave the maximum NDVI value (0.85) at grain filling among all treatments.
- Taxon
- wheatTriticum aestivumt0
- Material
- Faisalabad-2008e0
- Organ / stage
- grain filling stagee0
- Outcome
- NDVI valuee0
- Direction
- maximume0
- Value
- 0.85e0
- Comparator
- all treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tool for Wheat Yield Estimation”
e0“nitrogen treatment N4 (220 kg ha(-1)) and cultivar Faisalabad-2008 gave maximum NDVI value (0.85) at grain filling stage among all treatments”
Claim · model-written summary
NDVI at booting was positively correlated with wheat grain yield (R(2) = 0.90).
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- bootinge2
- Outcome
- correlation among NDVI at booting, grain filling, and maturity stages with grain yielde2
- Direction
- positivee2
- Value
- R(2) = 0.90e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tool for Wheat Yield Estimation”
e2“The correlation among NDVI at booting, grain filling, and maturity stages with grain yield was positive (R(2) = 0.90; R(2) = 0.90; R(2) = 0.95), respectively”
Claim · model-written summary
NDVI at grain filling was positively correlated with wheat grain yield (R(2) = 0.90).
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- grain fillinge2
- Outcome
- correlation among NDVI at booting, grain filling, and maturity stages with grain yielde2
- Direction
- positivee2
- Value
- R(2) = 0.90e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tool for Wheat Yield Estimation”
e2“The correlation among NDVI at booting, grain filling, and maturity stages with grain yield was positive (R(2) = 0.90; R(2) = 0.90; R(2) = 0.95), respectively”
Claim · model-written summary
NDVI at maturity was positively correlated with wheat grain yield (R(2) = 0.95).
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- maturity stagese2
- Outcome
- correlation among NDVI at booting, grain filling, and maturity stages with grain yielde2
- Direction
- positivee2
- Value
- R(2) = 0.95e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tool for Wheat Yield Estimation”
e2“The correlation among NDVI at booting, grain filling, and maturity stages with grain yield was positive (R(2) = 0.90; R(2) = 0.90; R(2) = 0.95), respectively”
Claim · model-written summary
Booting, grain filling and maturity can be good depictive stages for NDVI-based wheat yield estimation under Faisalabad conditions.
- Taxon
- wheatTriticum aestivume3
- Outcome
- good depictive stagese3
- Setting
- Faisalabade3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tool for Wheat Yield Estimation”
e3“booting, grain filling, and maturity can be good depictive stages during mid and later growth stages of wheat crop under agroclimatic conditions of Faisalabad”
The same questions in other papers
nitrogen · growth · Triticum aestivum (wheat)Positive and negative results
425 papers in the same direction as this paper · 116 in the opposite direction · 9 reporting no difference from an alternative
- positive
- negative
- no effect
547 papers more in this group
See all 551 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.