Context: The agroecological unit 9 (AEU 9) in Alappuzha district of Kerala represents the south central laterites. The soils are acidic, gravelly, having low activity clay, often underlain by plinthite with low water and nutrient retention capacity. Assessment of soil quality ind...
Open access
Research Article10.9734/ijpss/2023/v35i183474
Submergence transforms acidic rice soils into a dynamic biogeochemical environment in which redox potential, pH, iron and aluminium speciation, nutrient availability and microbial activity change throughout the cropping period. These transformations can partly alleviate aluminium...
Open access
Research Article10.9734/ijecc/2026/v16i105705
Submergence induces major changes in the chemical environment of paddy soils and can alter the mobility of redox- and pH-sensitive elements. The present study characterised the temporal dynamics of soil acidity and iron (Fe) and aluminium (Al) fractions during 90 days of continuo...
Open access
Research Article10.9734/ijpss/2026/v38i106353
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 saline water intrusion due to nearness of...
Open access
Research Article10.9734/arrb/2024/v39i122169
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 experiment was conducted in the Department o...
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Research Article10.9734/ijpss/2024/v36i44472
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 determine suitable mineral source for crops. A...
Open access
Research Article10.9734/cjast/2022/v41i2731784
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 heavy metal fractions in the sewage compo...
Open access
Research Article10.9734/cjast/2020/v39i1930789
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 from different agroecological zones of Ker...
Open access
Research Article10.9734/ijecc/2023/v13i113611
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. Study Design: Survey, collection of sampl...
Open access
Research Article10.9734/cjast/2023/v42i254184
Aim: To develop a multinutrient pellet for organic farming in rice and investigation on the nutrient release characteristics of pellet in acid sulphate soils of Kuttanad. Study Design: This experiment was conducted through completely randomized design with 8 treatments and 3 repl...
Open access
Research Article10.9734/ijpss/2023/v35i62835
The nutrient release from conventional chemical fertilizers to the soil are lost continuously through leaching, runoff, volatilisation, denitrification etc and also most of the time they do not satisfy the plant requirements without the continuous application. These issues have c...
Open access
Research Article10.9734/cjast/2022/v41i2031747
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 collected from three agricultural land use system...
Open access
Research Article10.9734/cjast/2020/v39i2130833
A survey was conducted from January to March 2023 to assess the soil biological fertility index across five agro-ecological units in the rice-growing belts of Southern Kerala. These units included Onattukara sandy loam (AEU 3), Kari soil (AEU 4), Pokkali soil (AEU 5), Southern la...
Open access
Research Article10.9734/ijecc/2024/v14i114536
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 incubation study were done in Completely...
Open access
Research Article10.9734/ijecc/2024/v14i104480
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 biochar (sewchar, SC) on plant growth and...
Open access
Research Article10.9734/ijpss/2024/v36i95022
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 Kuttanad region, these soils pose major constra...
Open access
Research Article10.9734/ijecc/2025/v15i105087
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 the efficiency of organopolymer and silic...
Open access
Research Article10.9734/ijpss/2025/v37i105804
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 river basin, specifically Neyyar, Mullayar,...
Open access
Research Article10.9734/ijecc/2023/v13i113444
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 completely randomized design with 14 treatments and...
Open access
Research Article10.9734/ijpss/2023/v35i143027