Threshold Value for Chlorophyll Meter as Decision Tool for Nitrogen Management of Potato

2006 ◽  
Vol 98 (3) ◽  
pp. 496-506 ◽  
Author(s):  
Marguerite Olivier ◽  
Jean-Pierre Goffart ◽  
Jean-François Ledent
Keyword(s):  
Threshold Value ◽  
Nitrogen Management ◽  
Decision Tool ◽  
Chlorophyll Meter

Site-Specific Nitrogen Management in Dry Direct-Seeded Rice Using Chlorophyll Meter and Leaf Colour Chart

Pedosphere ◽  
2015 ◽  
Vol 25 (1) ◽  
pp. 72-81 ◽  
Author(s):  
Ali Mohamed ALI ◽  
Harmit Singh THIND ◽  
Sandeep SHARMA ◽  
YADVINDER SINGH
Keyword(s):  
Nitrogen Management ◽  
Site Specific ◽  
Chlorophyll Meter ◽  
Leaf Colour ◽  
Direct Seeded ◽  
Colour Chart

Effect of LCC-based nitrogen application on growth and yieldof rice (Oryza sativa L.) varieties during dry season

2016 ◽  
Vol 51 (1) ◽  
Author(s):  
Shrabani Moharana ◽  
J.M. L. Gulati ◽  
S. N. Jena
Keyword(s):  
Oryza Sativa ◽  
Field Experiment ◽  
Grain Yield ◽  
Real Time ◽  
Oryza Sativa L ◽  
Threshold Value ◽  
Nitrogen Management ◽  
Nitrogen Application ◽  
Panicle Length ◽  
Straw Yield

Data from a field experiment on Real Time Nitrogen Management (RTNM) in rice revealed that variety Gobinda produced significantly the highest grain yield of 49.6 q ha-1 associated with long panicle (26.75 cm) bearing significantly the maximum number of filled grains panicle-1 (156.78) producing highest net return (Rs.33214.71), B-C ratio (1.83) and return per rupee invested (0.83). Application of nitrogen based on LCC threshold value 4 produced significantly the highest grain (52.6 q ha-1), straw yield (64.4 q ha-1), number of EBT m-2 (403.71), panicle length (25.43 cm) and 148.94 filled grain panicle-1. Variety x RTNM interaction was significant and variety Naveen and Gobinda produced significantly the highest yield of 55.4 and 58.2 q ha-1 at recommended of nitrogen whereas, Lalat and Hiranmayee responded to LCC threshold value 4 (N4) with grain yield of 50.4 and 52.1 q ha-1, respectively.

scholarly journals Maize-N: A Decision Tool for Nitrogen Management in Maize

2011 ◽  
Vol 103 (4) ◽  
pp. 1276-1283 ◽  
Author(s):  
T. D. Setiyono ◽  
H. Yang ◽  
D. T. Walters ◽  
A. Dobermann ◽  
R. B. Ferguson ◽  
...  
Keyword(s):  
Nitrogen Management ◽  
Decision Tool

Use of chlorophyll meter for nitrogen management in lowland rice

1995 ◽  
Vol 45 (1) ◽  
pp. 21-24 ◽  
Author(s):  
I. Johnkutty ◽  
SP. Palaniappan
Keyword(s):  
Nitrogen Management ◽  
Lowland Rice ◽  
Chlorophyll Meter

scholarly journals Effect of Real time nitrogen management on yield attributes of direct seeded rice by using SPAD meter and Greenseeker

2021 ◽  
Author(s):  
saishree HALLE ◽  
SABYASACHI BISWAL ◽  
BOYAPATI RAVI TEJA NAIDU ◽  
REDDYYAMINI BOMMISETTY
Keyword(s):  
Grain Yield ◽  
Dry Matter ◽  
Block Design ◽  
Rice Variety ◽  
Threshold Value ◽  
Nitrogen Management ◽  
Yield Attributes ◽  
Randomized Block Design ◽  
Direct Seeded ◽  
Spad Meter

A field experiment was conducted during Kharif 2018, laid out in Randomized Block Design with three replications having seven treatments viz. N omission (T1), N applied as basal and AT (T2), N as basal, AT and PI (T3), N as basal and top dressing at NDVI threshold of 0.75 (T4), at NDVI threshold of 0.8 (T5), at SPAD threshold of 35.0 (T6) and SPAD threshold of 37.5 (T7) with Rice variety Sahabhagidhan.The study revealed that application of 30 kg N/ha as basal dose and top dressing of 20 kg N/ha twice at 35 and 63 DAS guided by NDVI threshold value of 0.8 (T5) was found to be superior over other treatments with respect to productivity. T5 recorded highest grain yield of 4438 kg/ha which was 17.0% higher than that top dressed at NDVI threshold of 0.75 (T4) and 7.1% higher than that top dressed at SPAD threshold value of 37.5 (T7). In case of SPAD meter, nitrogen top dressed at threshold value of 37.5 (T7) produced grain yield of 4143 kg/ha which was 15.0% higher than T6. T5 produced maximum dry matter of 8678 kg/ha with highest grain yield (4438 kg/ha), straw yield (5092 kg/ha) and harvest index 46.0%.

Chlorophyll Meter– and Leaf Color Chart–Based Nitrogen Management for Rice and Wheat in Northwestern India

2002 ◽  
Vol 94 (4) ◽  
pp. 821-829 ◽  
Author(s):  
Bijay Singh ◽  
Yadvinder Singh ◽  
Jagdish K. Ladha ◽  
Kevin F. Bronson ◽  
Vethaiya Balasubramanian ◽  
...  
Keyword(s):  
Nitrogen Management ◽  
Leaf Color ◽  
Color Chart ◽  
Chlorophyll Meter ◽  
Northwestern India ◽  
Leaf Color Chart

Multiple Leaf Measurements Improve Effectiveness of Chlorophyll Meter for Durum Wheat Nitrogen Management

Crop Science ◽  
2014 ◽  
Vol 54 (2) ◽  
pp. 817-826 ◽  
Author(s):  
Guangyao Wang ◽  
Kevin F. Bronson ◽  
Kelly R. Thorp ◽  
Jarai Mon ◽  
Mohammad Badaruddin
Keyword(s):  
Durum Wheat ◽  
Nitrogen Management ◽  
Chlorophyll Meter
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