Explanipedia

Nanofertilizers for sustainable crop nutrition and production: A review Open

Rari Rajaji, R. Gladis, B. Rani, Thomas F. George, S. Sarada · 2025

Cation-anion Balance in Soils and Plants: Mechanisms, Interactions, and Implications in Soil Fertility Management Open

R. Swaroop, B. Rani, R. Gladis, Sowmya Rajan · 2025

Cation-anion balance plays a pivotal role in determining soil health, nutrient availability, and plant physiological function. Imbalances in ionic composition can significantly affect soil fertility, microbial activity, nutrient uptake, an…

Acid Sulphate Soils: Characteristics, Constraints and Integrated Management Strategies for Sustainable Utilization Open

Sumayya Saied, R. Gladis, B. Rani, Thomas George, Biju Joseph , et al. · 2025

Acid sulphate soils, rich in iron sulfides such as pyrite (FeS₂), are highly acidic soils that severely limit agricultural productivity due to low pH, aluminium and iron toxicity, nutrient imbalances, and poor fertility. In Kerala’s Kuttan…

Organopolymer Based Liming Materials for Alleviating Acidity in Acid Sulphate Soils of Kuttanad, India Open

Sumayya Saied, R. Gladis, Babitha Rani, Thomas George, Biju Joseph , et al. · 2025

Acid sulphate soils of Kerala are characterized by extreme acidity and toxic concentrations of aluminium (Al³⁺) and iron (Fe²⁺/Fe³⁺), which severely restrict crop growth and productivity. A laboratory incubation was undertaken to evaluate …

Temporal Variation in Micronutrient Content in Soil Amended with Thermochemical Organic Fertilizer Prepared from Different Reagent Combinations Open

P R Greeshma, Naveen Leno, B. Rani, G. Byju, Sheeba Rebecca Isaac , et al. · 2025

A laboratory incubation study was carried out in the Department of Soil Science and Agricultural Chemistry, for 90 days to assess the dynamics of micronutrient release from Thermochemical Organic Fertilizer (TOF) prepared using different r…

Impact of Humic Substances on Carbon Sequestration and Soil Resilience Open

J. P. Devika, B. Rani, R. Gladis, Gowri Priya, S. Sarada · 2025

Intensified cultivation linked with over application of chemical fertilizers and increasing human activities have been linked to enhanced CO2 emissions, decreasing soil fertility, increasing soil degradation and declining productivity of c…

Breaking Dormancy in Elephant Foot Yam [Amorphophallus paeoniifolius (Dennst.) Nicolson] Using Organic and Inorganic Amendments Open

J. C. Aswathy, Sheeba Rebecca Isaac, Shalini Pillai P, T. Sajitharani, R. Gladis , et al. · 2025

The present study was conducted at Instructional Farm, College of Agriculture, Vellayani, Thiruvananthapuram, Kerala, from December 2021 – February 2022, to assess the effectiveness of the treatments [cow dung, Trichoderma, Pink Pigmented …

Liming Materials in Combination with Co-Composted Biochar for Subsoil Acidity Amelioration in Southern Laterites of Kerala Open

Akhila Merin Mathew, B. Rani, B. Aparna, R. Gladis, Naveen Leno , et al. · 2024

Aims: To assess the capacity of co-composted biochar liming material combinations to alleviate surface, subsoil acidity and aluminium saturation. Study Design: A field experiment was laid out in randomized block design (RBD) replicated thr…

Probing Acid Sulphate Soils for Sustainable Rice Production in Kuttanad: Challenges and Solutions Open

A. K. Rohith, Biju Joseph, R. Gladis · 2024

Acid sulphate soils of Kuttanad region in Kerala belongs to the category of problem soils, where crop production can be achieved through extensive soil management. Existence of jarosites, Fe, Al and Mn causes severe acidity in soil, while …

Chitozan-zeolite Composite Fertilizer Formulations for Enhancing Nutrient Use Efficiency Open

M G Adithya, R. Gladis, B. Rani · 2024

The experiment was carried out in the Department of Soil Science and Agricultural Chemistry at the College of Agriculture, Vellayani, Kerala, from January to May 2024. Slow release fertilizer formulations (SRF) containing all the major (N,…

Spatial Variability of Micronutrient Status in Miyawaki Forest Development Open

M. Sreelekshmi, Naveen Leno, B. Rani, R. Gladis, Khaula Shirin · 2024

Aim: This study aims to quantitatively analyze the spatial variability in the micronutrient status of soil by conducting a comparative assessment of soil samples from Miyawaki forest and adjacent barren land. By focusing on key parameters …

Chitosan and its Derivatives for Agriculture Applications: A Review Open

P. Sreelakshmi, R. Gladis, Babita Rani, V.R. Shajan, B. Aparna , et al. · 2024

Chitosan is a semi-synthetic natural polysaccharide derived from the deacetylation of chitin, which is found in the exoskeletons of crustaceans and the cell walls of fungi. The primary attributes that characterize the chitosan biopolymer a…

Effect of Sewage Sludge, Sewage Sludge Compost and Sewage Sludge Biochar on Heavy Metal and It Fractions Open

M. R. Rehana, R. Gladis, B. Rani, Biju Joseph, Naveen Leno , et al. · 2024

This study was conducted to evaluate the effect of sewage sludge (SS), sewage sludge compost (SSC) and sewage sludge Biochar (Sewchar, SC) on the heavy metal content and its fractions. The preparation of sewage sludge compost, Sewchar and …

Effects of Sewage Sludge Biochar (Sewchar) Application on Nutrient Uptake and Yield of African Marigold Open

M. R. Rehana, R. Gladis, B. Rani, Biju Joseph, Naveen Leno , et al. · 2024

The study was conducted in the Department of Soil Science and Agricultural Chemistry, College of Agriculture, Vellayani, Thiruvananthapuram, India to evaluate the effect of sewage sludge (SS), sewage sludge compost (SSC) and sewage sludge …

Development and Characterization of Multi-Nutrient Formulations for Organic Farming Open

Lucy Taki, Biju Joseph, R. Gladis, B. Rani, Sajitha Rani T. , et al. · 2024

The study was to develop multi-nutrient formulations for organic farming containing all the essential macro and micronutrients. The experimental design selected was completely randomized design with 8 treatments and 3 replications. The exp…

Impact of Diverse Agricultural Land Uses on Soil Organic Matter Fractions: A Comprehensive Evaluation Open

B. Bincy, R. Gladis, B. Rani, B. Aparna, S. Sandeep , et al. · 2023

Organic matter is a crucial component of soil that influences various soil properties and functions, including nutrient cycling, soil structure, water holding capacity and microbial activity. Different agricultural land uses significantly …

Comparative Study of Soil Properties and Organic Matter Fractions in Organic and Conventional Farms of Kerala, India Open

M. V. Nayana, R. Gladis, Biju Joseph, O. S. · 2023

Aims: Assessing various soil properties as influenced by organic farming in the selected certified organic and conventional farms of Kerala. Study Design: Ten pairs of certified organic farms and nearby conventional farms were identified …

Influence of Land Uses on Soil Carbon Mineralization in Selected Agro-ecological Units of South Kerala, India Open

B. Bincy, R. Gladis, B. Rani, B. Aparna, S. Sandeep , et al. · 2023

Soil is a major reservoir of terrestrial carbon and it plays an important role in the global carbon cycle. The soil organic carbon (SOC) is the fundamental factor for sustainable agriculture because of the ability in maintaining the soil f…

Organic Carbon and Biological Properties of Soils in Various Agro-Ecological Units of Kerala, India Open

K. Adilakshmi, B. Aparna, B. Rani, R. Gladis, Naveen Leno , et al. · 2023

A study was carried out in four agro-ecological units (AEUs), viz., southern laterites (AEU 8), south central laterites (AEU 9), north central laterites (AEU 10), and the northern laterites (AEU 11) of Kerala, with the objective of detaili…

Evaluating Soil Erosion within the Neyyar Basin in Kerala through RUSLE and Geospatial Analysis Open

R. Gladis, G. V. Asha Rani, K. P. Rema, B. Rani, Biju Joseph , et al. · 2023

Soil erosion represents a significant issue in the Western Ghats, especially within the Neyyar river basin in the southern region of Kerala. To address this problem, a research project was conducted in three sub-watersheds of the Neyyar ri…

Chemical Status of Different Agro-Ecological Units of Kerala: A Comprehensive Study Open

K. Adilakshmi, B. Aparna, B. Rani, R. Gladis, Naveen Leno , et al. · 2023

A study was carried out in selected panchayats/municipalities of the four agro-ecological units (AEUs), AEU 8 (Southern laterites), AEU 9 (South central laterites), AEU 10 (North central laterites), and AEU 11 (Northern laterites) of Keral…

Assessment of Soil Quality and Nutrient index in Agroecological Unit 7 of Kerala and Mapping Using GIS Open

R. Gladis, Ajin P. Ashok, Biju Joseph, M. R. Rehana · 2023

Aims: Soil quality assessment is valuable for agricultural production. In this study, 150 soil samples at 0-15 and 15-30 cm depths were collected from Kaipad land (Agroecological unit 7) of Kerala to assess the quality and nutrient index. …

Ammoniacal and Nitrate Nitrogen Release Pattern from Biochar and Biochar Blended Urea Fertilizers in Sandy Soil Open

S. R. Kavya, B. Rani, B. Aparna, R. Gladis · 2023

Biochar, an organic product of thermal decomposition of biomass in an oxygen limited environment can be used as a nutrient carrier to delay the release of nutrients into the soil, reduce nutrient leaching, and improve the nutrient utilizat…

Carbon and Zeolite Based Slow Release Fertilizer Formulations Enhances Nutrient Use Efficiency and Yield in Chilli Open

Mahmuda Farha, R. Gladis, B. Rani, B. Aparna, S. Sarada , et al. · 2023

Aims: To develop slow release fertilizer formulations using humic acid, charcoal and zeolite and to evaluate nutrient availability, nutrient use efficiency and yield in chilli. Study Design: This experiment was conducted through completel…

Potassium Fractions and Release from Mineral Sources of Potassium as Influenced by Potassium Solubilizing Bacteria (Bacillus sporothermodurans) Open

A. S. Anila, Biju Joseph, B. Rani, R. Gladis, Pratheesh P. Gopinath · 2022

Potassium (K) in soil exists in four different forms such as water soluble, available, exchangeable and non-exchangeable potassium. Variation in K fractions in soils through addition of different mineral sources of K is essential to determ…

Effect of different sources of zinc on the activities of plant and soil enzymes Open

B. Aparna, R. Gladis, Gowripriya, U. A. Aswathy · 2021

The present investigation was conducted to study the effect of zinc fertilization on major biomeric characteristics, yield and post-harvest soil nutrient status. The experiment was carried out at college of Agriculture, Vellayani during 20…

Impact of flood on soil quality of South Central laterites (AEU 9) of Kerala and mapping using GIS techniques Open

Shafna Sh, R. Gladis, Manorama Thampatti Kc, Biju Joseph, Sheeja K Raj · 2021

A study was conducted to determine the soil quality and changes in the fertility status of soils after 2018 flood in Agro-ecological unit (AEU) 9 in Pathanamthitta district of Kerala and GIS maps were generated. A survey was conducted in t…

Organic Manure Seed Pelleting for Enhancing Soil Properties, Nutrient Uptake and Yield of Rice Open

R. Anagha, Biju Joseph, R. Gladis · 2020

Background: Seed pelleting involves the sticking of target materials on to the surface of seeds. Pelleted seeds make planting of small seeds much easier by altering their shape, size and density. The call out on organic farming explains th…

Soil Carbon Stock and Pools in Acid Sulphate Soils of Kerala Open

R. Gladis, K. R. Dhanya, Biju Joseph, B. Aparna, M. R. Rehana · 2020

A study was conducted to assess the soil carbon storage as different soil carbon pools in acid sulphate soils of Kuttanad, Kerala under different land uses and mapping of carbon stock using GIS. Surface soil samples (0-15 cm) were collecte…

Heavy Metal Stabilization in Sewage Sludge Composting Process Open

M. R. Rehana, Biju Joseph, R. Gladis · 2020

The most important factor limiting the soil application of sewage sludge is the presence of heavy metals. This study was conducted to evaluate the effect of composting on nutrient content, heavy metal (Cd, Cr, Ni and Pb) concentration and…

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