Book of Extended summaries ISDA
Book of Extended summaries ISDA Book of Extended summaries ISDA
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad farmers in some way. Therefore, in December 2021, a mid-term impact study was conducted with the same respondents to validate the hypothesis. The study was designed with specific objectives to understand and examine i) use and reach of FarmPrecise application along with other digital technologies, ii) changes in agricultural productivity, iii) changes in the cultivation costs, iv) Comparison between FarmPrecise users and business-as-usual farmers for changes in crop productivity, v) changes between FarmPrecise users and business-as-usual farmers for crop losses due to extreme weather events. The findings showed that the crop productivity of major crops of FarmPrecise users was higher than that of the business-as-usual farmers. In addition, a few FarmPrecise users reported that they avoided crop loss due to receiving advanced extreme weather alerts through the mobile application. Moreover, the average household income from agricultural sources has also increased compared to the baseline scenario. The real-time weather information, updated market rates, agriculture news, crop-specific weather-based advisories, farm diary, and community forum are some of the prominent features of the FarmPrecise application farmers use to become aware and cope with climate extremes events. T5-25P-1219 Assessment of Biophysical Parameters and Disease Incidence in Mungbean Using Hyperspectral Radiometry M. Prabhakar*, K. A. Gopinath, N. Ravi Kumar, U. Sai Sravan, M. Thirupathi, G. Sravan Kumar, P. Likhita, S. Madhu Naga Sekhar Reddy and R. Naresh ICAR-Central Research Institute for Dryland Agriculture, Hyderabad – 500 059, Telangana, India *m.prabhakar@icar.gov.in Mung bean (Vigna radiata L.) is an important pulse in India and is often experiencing biotic stress in the rainy season. Cercospora Leaf Spot (CLS) is an important fungal disease of mung bean, making its cultivation difficult and causing sizable loss to the production up to 60% (Bharti et al., 2017). CLS has been found to appear in the epiphytotic form causing enormous loss to the farmers (Vijaya Bhaskar, 2020). Timely management will help in preventing the spread of disease. Radiometry offer scope to detect biotic and abiotic stress (Prabhakar et al., 2013). The spectral features vary noticeably between healthy and infested plants depending on the extent of damage. Therefore, present study was carried out with an objective to find out the impact of CLS on biophysical parameters in mungbean using spectral features extraction. Methodology A field experiment was carried out in 2018 rainy (kKharif) season at Gungal Research Farm, ICAR-Central Research Institute for Dryland Agriculture, Hyderabad. The experiment was laid out in randomized block design with eight nutrient management treatments viz., T 1: Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment 756 | Page
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad Unamended control; T2: 100% RDF; T3: 75% RDF + 20 kg S ha -1 ; T4: 100% RDF + 20 kg S ha -1 ; T 5: 75% RDF + 30 kg S ha -1 ; T 6: 100% RDF + 30 kg S ha -1 ; T 7: 75% RDF + 40 kg S ha - 1 ; T 8: 100% RDF + 40 kg S ha -1 , replicated thrice. The crop was sown in 4.2 × 3.0 m 2 plots by adopting a seed rate of 20 kg ha -1 and 30 cm row to row spacing. The RDF used was 20-40-0 kg NPK ha -1 and the entire quantity of fertilizers (NPK) were applied as basal before sowing. The disease incidence (CLS) was observed at the time of flowering. Based on visual symptoms of damage, CLS infestation levels were categorized into four grades of severity viz. grade 1 (healthy), grade 2 (low), grade 3 (medium) and grade 4 (severe). The biophysical parameters (biomass, SPAD value and seed yield) were recorded under different severity grades. Canopy reflectance data from mungbean (15 plants per each grade) were recorded with FieldSpec 3 Hi- Res spectroradiometer (ASD 1999; spectral range: 350-2500 nm). Results The biophysical parameters of mungbean infested with CLS varied significantly under different severity grades As mentioned in the table. With the increase in CLS incidence, the SPAD value decreased by 22.9%. Fresh and dry biomass also varied significantly with CLS, however, the trends were not consistent. The fresh and dry biomass of mungbean under severely infested CLS was reduced by 30.1% and 38.5% compared to healthy plants. With increase in the severity of CLS infestation the yield had declined significantly. The maximum yield loss was observed in severely infested crop followed by medium CLS infestation compared to healthy plants. The seed yield was reduced in infested plants by 38.1% (across three grades) compared to healthy. SPAD value, biomass and seed yield of mungbean under different grades of CLS infestation Severity Grade SPAD value Fresh biomass (g plant -1 ) Dry biomass (g plant -1 ) Seed yield (g plant -1 ) Healthy 52.40 ± 5.69 a 42.42 ± 7.77 a 8.57 ± 2.11 a 2.02 ± 0.18 a Low 45.10 ± 1.35 b 38.25 ± 8.93 a 7.66 ± 1.29 ab 1.49 ± 0.25 b Medium 45.10 ± 1.35 b 35.93 ± 5.91 ab 6.84 ± 1.54 b 1.31 ± 0.15 c Severe 40.37 ± 0.94 c 29.64 ± 7.59 b 5.27 ± 1.65 c 0.96 ± 0.10 d Values are Mean ± SD, different superscript letters denote significant difference (p < 0.05) Mean canopy reflectance of different CLS severity grades from the field based hyperspectral radiometry studies showed a distinct difference between healthy and infested plants in the figure at different levels of infestation as described in the figure. Reflectance from the CLS infested plants compared to healthy was high in visible region (400-750 nm) and was lower in near infra-red region (750-1100 nm). Healthy plants have higher reflectance in NIR region and low reflectance in the visible region. 757 | Page Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment
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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &<br />
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad<br />
farmers in some way. Therefore, in December 2021, a mid-term impact study was conducted<br />
with the same respondents to validate the hypothesis. The study was designed with specific<br />
objectives to understand and examine i) use and reach <strong>of</strong> FarmPrecise application along with<br />
other digital technologies, ii) changes in agricultural productivity, iii) changes in the cultivation<br />
costs, iv) Comparison between FarmPrecise users and business-as-usual farmers for changes<br />
in crop productivity, v) changes between FarmPrecise users and business-as-usual farmers for<br />
crop losses due to extreme weather events.<br />
The findings showed that the crop productivity <strong>of</strong> major crops <strong>of</strong> FarmPrecise users was higher<br />
than that <strong>of</strong> the business-as-usual farmers. In addition, a few FarmPrecise users reported that<br />
they avoided crop loss due to receiving advanced extreme weather alerts through the mobile<br />
application. Moreover, the average household income from agricultural sources has also<br />
increased compared to the baseline scenario. The real-time weather information, updated<br />
market rates, agriculture news, crop-specific weather-based advisories, farm diary, and<br />
community forum are some <strong>of</strong> the prominent features <strong>of</strong> the FarmPrecise application farmers<br />
use to become aware and cope with climate extremes events.<br />
T5-25P-1219<br />
Assessment <strong>of</strong> Biophysical Parameters and Disease Incidence in Mungbean<br />
Using Hyperspectral Radiometry<br />
M. Prabhakar*, K. A. Gopinath, N. Ravi Kumar, U. Sai Sravan, M. Thirupathi, G.<br />
Sravan Kumar, P. Likhita, S. Madhu Naga Sekhar Reddy and R. Naresh<br />
ICAR-Central Research Institute for Dryland Agriculture, Hyderabad – 500 059, Telangana, India<br />
*m.prabhakar@icar.gov.in<br />
Mung bean (Vigna radiata L.) is an important pulse in India and is <strong>of</strong>ten experiencing biotic<br />
stress in the rainy season. Cercospora Leaf Spot (CLS) is an important fungal disease <strong>of</strong> mung<br />
bean, making its cultivation difficult and causing sizable loss to the production up to 60%<br />
(Bharti et al., 2017). CLS has been found to appear in the epiphytotic form causing enormous<br />
loss to the farmers (Vijaya Bhaskar, 2020). Timely management will help in preventing the<br />
spread <strong>of</strong> disease. Radiometry <strong>of</strong>fer scope to detect biotic and abiotic stress (Prabhakar et al.,<br />
2013). The spectral features vary noticeably between healthy and infested plants depending on<br />
the extent <strong>of</strong> damage. Therefore, present study was carried out with an objective to find out the<br />
impact <strong>of</strong> CLS on biophysical parameters in mungbean using spectral features extraction.<br />
Methodology<br />
A field experiment was carried out in 2018 rainy (kKharif) season at Gungal Research Farm,<br />
ICAR-Central Research Institute for Dryland Agriculture, Hyderabad. The experiment was laid<br />
out in randomized block design with eight nutrient management treatments viz., T 1:<br />
Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment<br />
756 | Page