<div>Background: The purpose of this study is to determine various topographic features as well as the characteristics of micro and macro nutrients in soil samples in the Onattukara wetland paddy fields&rsquo; special agricultural zone. Using the Global Positioning System, the particular locations of several soils sampling areas located in different Onattukara blocks were found (GPS). The macro (N, P, K) and micro (zinc, iron, copper, manganese) nutrients in soil samples taken from various places in the paddy fields region were studied. 
 
Methods: The Onattukara special agricultural wetland zone in this field investigation during 2017-2018, GPS technique method was used to locating 16 soil samples were collected. Laboratory methods used for chemical analysis of soil. 
 
Result: Nitrogen and phosphorus availability were found to be poor in almost all soil samples, whereas potassium availability was found to be medium. In almost all soil samples, the presence of micronutrients (zinc, copper and iron) was found to be critical. The data shows that soils are lacking in N, P and K, necessitating the addition of additional fertilizer and manures to make them acceptable for cultivation and promote healthy growth.</div>

Assessment of Macro and Micro Nutrients of Soil in Rice (Oryza sativa L.) Fields in Onattukara Wetlands Regions, Kerala

<div>Background: Amaranthus is the most popular and commercially cultivated leafy vegetable in the Southern part of India, especially Tamil Nadu and Kerala which is susceptible to a number of diseases. Among the different diseases affecting amaranth, foliar blight caused by Rhizoctonia solani Kuhn, is considered as the most serious disease in Kerala.&nbsp; 
 
Methods: A field experiment was taken up at Onattukara Regional Agricultural Research Station (O.R.A.R.S), Kayamkulam, Alappuzha, Kerala during December 2019 to February 2020 to assess the influence of dust and liquid formulations of Plant Growth Promoting Rhizobacteria (PGPR) mix I on growth, yield and disease incidence (Rhizoctonia leaf blight) in amaranthus.&nbsp; 
 
Result: The results of the study reveal that maximum number of leaves, number of branches per plant and yield were produced by the plants that were subjected to seedling root dip with 5% talc formulation followed by drenching with 5% talc solution at 30 DAT and 45 DAT. Regardless of talc or liquid formulation of PGPR mix I (2%) seedling dip followed by drenching at 15, 30 and 45 DAT provided the least disease incidence and disease severity in amaranthus at Onattukara condition. Hence use of PGPR mix I is a prerequisite for effective growth, yield and management of leaf blight of amaranthus at Onattukara.</div>

<div>Effect of Inoculation of Plant Growth Promoting Rhizobacteria (PGPR) Mix I Formulations on Plant Growth, Yield, Disease Incidence and Disease Severity of Rhizoctonia Leaf Blight of Amaranthus (Amaranthus tricolor L.)</div>