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Trichur, India

Kerala Agricultural University is the primary and the principal instrumentality of the Kerala state in providing human resources, and skills and technology, required for the sustainable development of its agriculture, defined broadly encompassing all production activities based on land and water, including crop production , forestry and fisheries through conducting, interfacing and integrating education, research and extension in these spheres of economic endeavour. It is situated in Vellanikkara, Thrissur, Kerala.Dr. P. Rajendran is the Vice-Chancellor and Dr. E.K. Mathew is the Registrar Wikipedia.

Panjikkaran S.T.,Kerala Agricultural University
Indian Pediatrics

The prevalence of overweight/obesity among 6000 children at 7-12 years was monitored using the established methodologies. Prevalence rates obtained using percentiles were proximate to that using waist-to-height ratio (WHTR) 0.50 and were on par with the reported rates. The prevalence were worked out with WHTR values from 0.45 to 0.53 and compared with percentiles. The minimum per cent deviation of 5.4 was observed at WHTR of 0.48 (against 6.4% at WHTR 0.50) and further the deviation at this point was distributed near-uniformly (2.6% above and 2.8% below the WHTR), suggesting that this is the optimum cutoff point for children in this region. ROC analysis against percentiles has given a higher sensitivity of 0.630 at WHTR 0.48 in this region and area under ROC curve was 0.827 at WHTR 0.48. © 2013 Indian Academy of Pediatrics. Source

Mohan Kumar B.,Kerala Agricultural University
Journal of Tropical Agriculture

Kerala with many woody perennial-based land use practices is one of the "Meccas" of agroforestry. Twenty-five years of research has demonstrated the potential of agroforestry as a sustainable production system in the state. Aspects such as system inventory and dynamics, species richness, belowground interactions, nutrient cycling, tree and stand management, carbon sequestration potential, timber and fuelwood properties, and socioeconomic aspects were the major themes investigated. Considering the state's unique land use, demographic, political, and sociocultural characteristics, Kerala's experience in agroforestry research is important to agroforestry development, especially in the humid tropical regions. Although agroforestry has received much attention from researchers, for its perceived ability to contribute to environmental quality, agrobiodiversity conservation, and nutrient cycling, the policy makers are yet to fully recognize such benefits and agroforestry extension is either weak or non-existent in the state. This calls for more process-oriented research and policy initiatives to promote agroforestry among the farmers of Kerala. Source

Manalil S.,University of Western Australia | Manalil S.,Kerala Agricultural University | Busi R.,University of Western Australia | Renton M.,University of Western Australia | Powles S.B.,University of Western Australia
Weed Science

Herbicide rate cutting is an example of poor use of agrochemicals that can have potential adverse implications due to rapid herbicide resistance evolution. Recent laboratory-level studies have revealed that herbicides at lower-than-recommended rates can result in rapid herbicide resistance evolution in rigid ryegrass populations. However, crop-field-level studies have until now been lacking. In this study, we examined the impact of low rates of diclofop on the evolution of herbicide resistance in a herbicide-susceptible rigid ryegrass population grown either in a field wheat crop or in potted plants maintained in the field. Subsequent dose-response profiles indicated rapid evolution of diclofop resistance in the selected rigid ryegrass lines from both the crop-field and field pot studies. In addition, there was moderate level of resistance in the selected lines against other tested herbicides to which the population has never been exposed. This resistance evolution was possible because low rates of diclofop allowed substantial rigid ryegrass survivors due to the potential in this cross-pollinated species to accumulate all minor herbicide resistance traits present in the population. The practical lesson from this research is that herbicides should be used at the recommended rates that ensure high weed mortality to minimize the likelihood of minor herbicide resistance traits leading to rapid herbicide resistance evolution. © 2011 Weed Science Society of America. Source

Jayachandran K.V.,Kerala Agricultural University
Indian Journal of Animal Sciences

Prawns and shrimps comprise about 2500 species and are distributed throughout the world. They belong to complex taxonomic groups. The prawns of the family Palaemonidae Rafinesque, 1815 are highly important on both commercial as well as ecological point of view. Extensive studies on the biodiversity and taxonomy of Indian freshwater prawns have been carried out by many and they have recorded 75 species belonging to 8 genera under the subfamily Palaemoninae Rafinesque, 1815 and these prawns inhabit a wide range of habitats from hill top to estuaries. The present paper provides a comprehensive account on various aspects such as diversity of species, state wise distribution of species, taxonomie status and confusion, molecular taxonomy, karyological information, distribution based on their habitat, present level of utilization of diversity, research challenges and also ex situ and in situ conservation methods and needs of palaemonid prawns of India. Source

Kumar B.M.,Kerala Agricultural University
Agriculture, Ecosystems and Environment

Tropical homegardens with high agrobiodiversity have high potential for carbon (C) sequestration, especially under changing environments. Floristic diversity, richness, and aboveground C stocks and how size of homegardens influence agrobiodiversity and C sequestration potential were assessed in the Kerala homegardens. A total of 839 homegardens in 28 panchayaths (lowest unit of local self-government) of Thrissur, Palakkad, and Malappuram districts were surveyed through a stratified random process. Information was gathered on holding size, floristic composition, plant height, and girth at breast height (GBH) of all trees and shrubs (>20cm GBH). Aboveground C stocks of trees were computed using allometric relationships, assuming C as 50% of biomass. The homegardens were also classified into small (<0.4ha), medium (0.4-1.2ha), and large (>1.2ha). In total, 473 species were recorded, of which 208 were trees (>20cm GBH), 86 shrubs, and 179 herbs. Simpson's floristic diversity index (0.64, 0.41, and 0.46 for a subset of small, medium, and large homegardens, respectively), species richness, and tree density (per hectare) were highest for small-sized holdings. Large-sized homegardens, however, had more stems per garden. Average aboveground standing stocks of C ranged from 16 to 36Mgha -1, with small homegardens having higher C stocks on unit area basis than large- and medium-sized ones. Implicit in this is the potential for C sequestration and agrobiodiversity conservation, especially by small homegardens. © 2011 Elsevier B.V. Source

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