Subash Surendran Padmaja

Bio: Subash Surendran Padmaja is an academic researcher from Agricultural & Applied Economics Association. The author has contributed to research in topics: Agricultural productivity & Population. The author has an hindex of 5, co-authored 11 publications receiving 63 citations. Previous affiliations of Subash Surendran Padmaja include Indian Council of Agricultural Research.

Climate change, drought and rural communities: Understanding people's perceptions and adaptations in rural eastern India

Abstract: Household's adaptation to drought risk consists of two steps. First step is acquiring knowledge on drought from previous drought experiences. Second step is formulation of local adaptation measures that can reduce drought risk. Lack of knowledge regarding households' perception about droughts and local adaptation measures are identified as barriers in formulating effective adaptation strategies and polices. Therefore, this paper aims to gather information on households' perceptions about drought impacts and local adaption and coping measures. We also analysed the potential determinants that affect the household's preferences for future adaptation and coping strategies. Data for the study was collected from 157 drought prone rural households of Odisha state in India. We employed both qualitative and quantitative methods to analyze the data. The major impacts of drought reported by rural people were the yield reduction/loss and issues of various diseases during drought. Although more than half of rural households reported adverse effects of drought, it was not their predominate concern. The most common coping measure adopted by the rural people during drought was reduction in the consumption of rice/cereals. The results indicate that rural people prefer to follow reduction in the food consumption strategy in future also. Family size, gender and education of household head and distance to nearby town influenced the preference of adaptation and coping strategies. This research can stand as one mainstay in providing insights to researches and policy makers in formulating strategies and policies for vulnerability reduction in rural India.

Linking Food Security with Household’s Adaptive Capacity and Drought Risk: Implications for Sustainable Rural Development

Abstract: In spite of green revolution and rapid economic growth, India’s vast population still suffers from hunger and poverty, especially in the rural areas. Moreover, drought adversely affects India’s economy by declining agricultural production and purchasing power. It also escalates rural unemployment which ultimately affects household food security. Our study investigated the food security of drought prone rural households in a broader context by linking the dimensions of food security with dimensions of climate change vulnerability. We used the primary data of 157 drought prone rural households of Odisha state in India for analysis. This study employed polychoric principal component analysis to construct an aggregate food security index. An ordered probit model was used to estimate the determinants of food security. The FSI showed that three-fourth of the respondents were facing food security issues with varying degrees. The estimates of ordered probit model indicated that joint family, education, migration and health insurance are key variables that determine food security, whereas drought adversely affected food security of rural households. Overarching strategies are required to effectively address food security issues in the wake of increased drought risk. This study provides an insight for policy makers in India and in similar south Asian countries who must consider food security in the light of drought.

Agricultural information and knowledge network in rural India: a case of Bihar

Abstract: Purpose: The key informants in a village setup were studied to understand the existing social and knowledge systems of farmers, their structure, and relationships between different actors. The purp...

Flood vulnerability and food security in eastern India: A threat to the achievement of the Sustainable Development Goals

Abstract: The food security situation in India has improved due to economic growth, increased agricultural productivity, public policies and hunger eradication programmes. Nevertheless, much of India's population still suffers from hunger and poverty. Floods obstruct agricultural production; destroy infrastructure; and disrupt livelihoods, normal services, health care, etc. In this way, floods ultimately affect households' food security. We examined household food security in flood-prone rural areas of India in a more extensive way than in previous studies by constructing an index that incorporates various factors of the food security dimensions. Factors determining the level of flood-prone households' food security were also analyzed. By polychoric principal component analysis, an aggregate food security index was constructed. The food security score was regressed on different explanatory variables to evaluate their effect on the overall food security situation in the study area. Our results showed that three-fourths of the respondent households faced food security issues to varying degrees. Family type, physical assets and employment scheme showed positive impacts on the level of food security of the respondents. In contrast, households with female household heads and those suffering losses of property due to floods were adversely affected in terms of negative impacts on overall food security. The results suggest the need for the adoption of integrated strategies to effectively address food security issues amidst the increased severity of flood events. The study findings are useful for policy makers in India and countries with similar backgrounds to tackle the food insecurity brought about by flood hazards.

The knowledge-creating company

Abstract: How have Japanese companies become world leaders in the automotive and electronics industries, among others? What is the secret of their success? Two leading Japanese business experts, Ikujiro Nonaka and Hirotaka Takeuchi, are the first to tie the success of Japanese companies to their ability to create new knowledge and use it to produce successful products and technologies. In The Knowledge-Creating Company, Nonaka and Takeuchi provide an inside look at how Japanese companies go about creating this new knowledge organizationally. The authors point out that there are two types of knowledge: explicit knowledge, contained in manuals and procedures, and tacit knowledge, learned only by experience, and communicated only indirectly, through metaphor and analogy. U.S. managers focus on explicit knowledge. The Japanese, on the other hand, focus on tacit knowledge. And this, the authors argue, is the key to their success--the Japanese have learned how to transform tacit into explicit knowledge. To explain how this is done--and illuminate Japanese business practices as they do so--the authors range from Greek philosophy to Zen Buddhism, from classical economists to modern management gurus, illustrating the theory of organizational knowledge creation with case studies drawn from such firms as Honda, Canon, Matsushita, NEC, Nissan, 3M, GE, and even the U.S. Marines. For instance, using Matsushita's development of the Home Bakery (the world's first fully automated bread-baking machine for home use), they show how tacit knowledge can be converted to explicit knowledge: when the designers couldn't perfect the dough kneading mechanism, a software programmer apprenticed herself withthe master baker at Osaka International Hotel, gained a tacit understanding of kneading, and then conveyed this information to the engineers. In addition, the authors show that, to create knowledge, the best management style is neither top-down nor bottom-up, but rather what they call "middle-up-down," in which the middle managers form a bridge between the ideals of top management and the chaotic realities of the frontline. As we make the turn into the 21st century, a new society is emerging. Peter Drucker calls it the "knowledge society," one that is drastically different from the "industrial society," and one in which acquiring and applying knowledge will become key competitive factors. Nonaka and Takeuchi go a step further, arguing that creating knowledge will become the key to sustaining a competitive advantage in the future. Because the competitive environment and customer preferences changes constantly, knowledge perishes quickly. With The Knowledge-Creating Company, managers have at their fingertips years of insight from Japanese firms that reveal how to create knowledge continuously, and how to exploit it to make successful new products, services, and systems.

Abiotic Stress and Reactive Oxygen Species: Generation, Signaling, and Defense Mechanisms

Abstract: Climate change is an invisible, silent killer with calamitous effects on living organisms As the sessile organism, plants experience a diverse array of abiotic stresses during ontogenesis The relentless climatic changes amplify the intensity and duration of stresses, making plants dwindle to survive Plants convert 1-2% of consumed oxygen into reactive oxygen species (ROS), in particular, singlet oxygen (1O2), superoxide radical (O2•-), hydrogen peroxide (H2O2), hydroxyl radical (•OH), etc as a byproduct of aerobic metabolism in different cell organelles such as chloroplast, mitochondria, etc The regulatory network comprising enzymatic and non-enzymatic antioxidant systems tends to keep the magnitude of ROS within plant cells to a non-damaging level However, under stress conditions, the production rate of ROS increases exponentially, exceeding the potential of antioxidant scavengers instigating oxidative burst, which affects biomolecules and disturbs cellular redox homeostasis ROS are similar to a double-edged sword; and, when present below the threshold level, mediate redox signaling pathways that actuate plant growth, development, and acclimatization against stresses The production of ROS in plant cells displays both detrimental and beneficial effects However, exact pathways of ROS mediated stress alleviation are yet to be fully elucidated Therefore, the review deposits information about the status of known sites of production, signaling mechanisms/pathways, effects, and management of ROS within plant cells under stress In addition, the role played by advancement in modern techniques such as molecular priming, systems biology, phenomics, and crop modeling in preventing oxidative stress, as well as diverting ROS into signaling pathways has been canvassed

Nanotechnology to advance CRISPR-Cas genetic engineering of plants.

Abstract: CRISPR-Cas genetic engineering of plants holds tremendous potential for providing food security, battling biotic and abiotic crop stresses caused by climate change, and for environmental remediation and sustainability. Since the discovery of CRISPR-Cas technology, its usefulness has been demonstrated widely, including for genome editing in plants. Despite the revolutionary nature of genome-editing tools and the notable progress that these tools have enabled in plant genetic engineering, there remain many challenges for CRISPR applications in plant biotechnology. Nanomaterials could address some of the most critical challenges of CRISPR genome editing in plants through improvements in cargo delivery, species independence, germline transformation and gene editing efficiency. This Perspective identifies major barriers preventing CRISPR-mediated plant genetic engineering from reaching its full potential, and discusses ways that nanoparticle technologies can lower or eliminate these barriers. We also describe advances that are needed in nanotechnology to facilitate and accelerate plant genome editing. Timely advancement of the application of CRISPR technologies in plant engineering is crucial for our ability to feed and sustain the growing human population under a changing global climate.