Academic literature on the topic 'Enhanced metal fertility'
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Journal articles on the topic "Enhanced metal fertility"
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Chu, Chen-Yao, and Tzu-Hsing Ko. "Evaluation of Acid Leaching on the Removal of Heavy Metals and Soil Fertility in Contaminated Soil." Journal of Chemistry 2018 (June 4, 2018): 1–8. http://dx.doi.org/10.1155/2018/5036581.
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Heavy metal-contaminated soils were leached with various acid reagents, and a series of treatments was assessed to understand soil fertility after acid leaching. Aqua regia digestion and a five-step sequential extraction procedure were applied to determine heavy metal distribution. The average total concentrations of Zn, Cd, Cu, and Pb for contaminated soil were 1334, 25, 263, and 525 mg·kg−1 based on the ICP/AES quantitative analysis. Other than Pb extracted by H2SO4, over 50% removal efficiency of other heavy metals was achieved. A five-step sequential extraction revealed that the bound-to-carbonate and bound-to-Fe-Mn oxides were the major forms of the heavy metals in the soil. The addition of organic manure considerably promoted soil fertility and increased soil pH after acid leaching. Seed germination experiments demonstrated that after acid leaching, the soil distinctly inhibited plant growth and the addition of manure enhanced seed germination rate from 35% to 84%. Furthermore, the procedure of soil turnover after acid leaching and manure addition greatly increased seed germination rate by 61% and shortened the initial germination time. Seed germination in untreated soil was superior to that in acid-leached soil, illustrating that the phytotoxic effect of acid leaching is more serious than that of heavy metals.
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Aslam, Tehreem, and Ambreen Ahmed. "Lead-Tolerant Bacteria Can Minimize Lead Toxicity in Plants." RADS Journal of Biological Research & Applied Sciences 9, no. 1 (September 10, 2018): 1–7. http://dx.doi.org/10.37962/jbas.v9i1.135.
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In today’s world, environment is exposed to lead due to various anthropogenic activities. It adversely affects plants as well as microorganisms by disturbing soil health and fertility. Bioremediation is a technique used to sequester heavy metals from the contaminated soil and it can be used to decontaminate the polluted soil. Lead-tolerant plant health promoting rhizobacteria (PHPR) can be used to enhance the efficacy of lead remediation. Lead uptake can be enhanced through bacteria by modifying root structure, secreting metal sequestering molecules in rhizosphere and alleviating lead induced phytotoxicity. For this purpose, lead-resistant auxin-producing bacteria were isolated from the rhizosphere of some plants. These auxin-producing lead-tolerant bacteria were used to treat Zea mays both in the presence and absence of lead-stress under laboratory conditions and its impact on plant growth and biochemical parameters of Zea mays were analysed.
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Miller, Jarrod O., Anastasios D. Karathanasis, and Christopher J. Matocha. "In Situ Generated Colloid Transport of Cu and Zn in Reclaimed Mine Soil Profiles Associated with Biosolids Application." Applied and Environmental Soil Science 2011 (2011): 1–9. http://dx.doi.org/10.1155/2011/762173.
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Areas reclaimed for agricultural uses following coal mining often receive biosolids applications to increase organic matter and fertility. Transport of heavy metals within these soils may be enhanced by the additional presence of biosolids colloids. Intact monoliths from reclaimed and undisturbed soils in Virginia and Kentucky were leached to observe Cu and Zn mobility with and without biosolids application. Transport of Cu and Zn was observed in both solution and colloid associated phases in reclaimed and undisturbed forest soils, where the presence of unweathered spoil material and biosolids amendments contributed to higher metal release in solution fractions. Up to 81% of mobile Cu was associated with the colloid fraction, particularly when gibbsite was present, while only up to 18% of mobile Zn was associated with the colloid fraction. The colloid bound Cu was exchangeable by ammonium acetate, suggesting that it will release into groundwater resources.
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Roebuck, C. J., S. J. Siebert, J. M. Berner, and J. Marcelo-Silva. "The Influence of Serpentine Soil on the Early Development of a Non-Serpentine African Thistle, Berkheya radula (Harv.) De Wild." Plants 11, no. 18 (September 9, 2022): 2360. http://dx.doi.org/10.3390/plants11182360.
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Serpentine soils are rich in heavy metals and poor in nutrients, limiting plant species’ performance and survival. Nevertheless, specificities of such limitations as well as adaptability features required for thriving in serpentine environments are barely known. The Barberton Greenstone Belt in South Africa is an example of an area containing serpentine soil with adapted vegetation. In this study, a pot experiment was performed to compare development features (i.e., germination rates, leaf count, leaf length, biomass and photosynthetic capacity) during the early development of the non-serpentine species Berkheya radula, a genus consisting of known metal hyperaccumulators from serpentine areas in South Africa. B. radula was grown in serpentine soils taken from the Barberton region. B. radula leaves had heavy metals in concentrations that confirmed the species as a phytoextractor. There were trends for enhanced productivity and photosynthesis in the serpentine treatments compared to the control. Leaf count, leaf length, electron transport efficiency (ψEo/(1 − ψEo), density of reaction centers and PIABS,total were significantly and positively correlated with at least one of the heavy metals in the leaves. Germination rates were positively influenced by K, whereas biomass and the density of reaction centers were negatively affected by Ca and P, and only Ca, respectively. The heavy metals Zn, Ni and Co were positively correlated with each other, whereas they were negatively correlated with the macronutrients K, Ca and P. The latter correlated positively with each other, confirming higher fertility of the control soil. Our study suggests that B. radula exhibits metallophyte characteristics (i.e., preadapted), despite not naturally occurring on metal-enriched soil, and this provides evidence that the potential for bioaccumulation and phytoremediation is shared between serpentine and non-serpentine species in this genus.
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Ma, Degang, Yuxin Wang, Yu Ye, Xiaomei Ge, and Xuebin Lu. "Effects of Three Sludge Products from Co-Treatment of Wastewater on the Soil Properties and Plant Growth of Silty Loam." International Journal of Environmental Research and Public Health 19, no. 7 (April 6, 2022): 4385. http://dx.doi.org/10.3390/ijerph19074385.
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Currently, little is known about systematic comparisons of sludge products obtained from different sludge treatment processes in terms of land use. Moreover, it is worth evaluating whether the sludge produced from the co-treatment of industrial wastewater and domestic sewage can be applied to land use. In this study, three sludge products derived from the same municipal sludge—sludge biochar (SSB), dried sludge (DSS), and sludge compost (SSC)—were added to silty loam (SL) at a 20% mass ratio to assess their effects on soil structure, properties, and fertility. Chinese cabbage was planted as a model crop and its growth and physiological state were monitored. The experimental results showed that the water retention of the soil was significantly related to its porosity, and the moisture in the three sludge products-modified soil mainly existed in the form of free water. The addition of three sludge products increased the total porosity of SL. SSC enhanced the water retention of SL by increasing the capillary porosity, and SSB improved the gas permeability of SL by increasing the non-capillary porosity. The three sludge products all increased the content of large particles in the soil and improved the stability of the aggregates of SL. Among them, SSB and DSS had significant effects on improving the stability of the aggregates. Although the addition of the three sludge products improved the fertility of SL, compared with that of DSS and SSC, the addition of SSB made the growth indices of Chinese cabbage the best, indicating that SSB can effectively maintain soil nutrients. The heavy metal test results of Ni showed that SSB had a good stabilizing effect on heavy metals. Therefore, compared with drying and composting, pyrolysis of municipal sludge is more suitable for SL improvement.
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Cardarelli, Mariateresa, Antonio El Chami, Paola Iovieno, Youssef Rouphael, Paolo Bonini, and Giuseppe Colla. "Organic Fertilizer Sources Distinctively Modulate Productivity, Quality, Mineral Composition, and Soil Enzyme Activity of Greenhouse Lettuce Grown in Degraded Soil." Agronomy 13, no. 1 (January 7, 2023): 194. http://dx.doi.org/10.3390/agronomy13010194.
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Intensive greenhouse vegetable production is often associated with a decline of crop productivity due to the increase of soil salinity and/or a reduction of biological fertility. The aim of the current work was to assess the effects of three organic fertilizers on morpho-physiological and agronomic traits of greenhouse lettuce as well as soil enzyme activity under poor soil quality conditions. The tested organic fertilizers (poultry manure, vinasse-based fertilizer, and insect’s frass fertilizer) were applied pre-planting at the same equivalent nitrogen (N) rate (90 kg N ha−1). Laboratory incubation assay results showed that vinasse-based fertilizer was the most suitable fertilizer in supplying the mineral N in the short term. All fertilizers increased shoot fresh and dry weight compared to unfertilized control with a more pronounced effect (+75%) with vinasse-based fertilizer and insect’s frass. Insect frass reduced by 27% the leaf nitrate concentration in comparison with the other treatments. The toxic heavy metal Pb was 46% lower in all organically fertilized lettuce leaves. Soil enzymatic activities of acid phosphatase, alkaline phosphatase, arylsulfatase (ArS), N-acetyl-β-D-glucosaminidase (NAGase), dehydrogenase, and total hydrolase (THA) were enhanced by poultry manure and insect’s frass in comparison with unfertilized control while vinasse-based fertilizer increased ArS, NAGase, and THA. Taken together, our data demonstrate that the application of organic fertilizers especially vinasse-based fertilizer and insect’s frass during intensive crop production is a suitable approach for mitigating the negative impact of soil salinity, enhancing soil biological fertility, and improving agronomic performance of greenhouse lettuce.
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Subhalakshmi, Thangjam, and R. K. Imotomba Singh. "Trichoderma: A Beneficial Organism for Agriculture." International Journal of Current Microbiology and Applied Sciences 11, no. 1 (January 10, 2022): 440–44. http://dx.doi.org/10.20546/ijcmas.2022.1101.055.
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Trichoderma spp. are the most commonly used and widely applied biocontrol agents which is known for its antagonistic activities against plant pathogens especially soil borne pathogens such as Fusarium spp. (Fusarium wilt), Rhizoctonia, Pythium (Damping off), Sclerotium rolfsii (Sclerotinia rot), etc. Trichoderma exhibit diverse array of activities viz. plant growth promotion, biofertilizer, bioagents through the production of different biocontrol mechanisms (enzymes) such as chitinase, protease, glucanase, etc. Their mode of action is either by parasitizing the plant pathogens, secreting antibiotics or by competing for space and nutrients. Nutrient uptake is also enhanced as it regulates the root architecture promoting better root growth. Recently studies have found that it can also be utilized for bioremediation which will play a pivotal role in rejuvenating the environment from toxic substances. Heavy metal contaminants like Ni, Cd, Zn, Pb, As has been tolerated and accumulated by Trichoderma sp. Decomposition rate was fastened when Trichoderma was inoculated in agricultural waste substrate. It can detoxify toxic pesticides and fungicides which will be of great help in solving the environment pollutants besides increasing the soil fertility. Its role as biocontrol and as bioremediation can be of great advantage to the agriculture sector in solving disease problems and providing safe environment.
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G, ROSIN K., SARVENDRA KUMAR, N. PATEL, K. LAL, R. KAUR, and V. K. SHARMA. "Effect of improved land and water management strategies on crop productivity and soil fertility in wastewater irrigated eggplant (Solanum melongena)." Indian Journal of Agricultural Sciences 90, no. 10 (December 4, 2020): 1959–63. http://dx.doi.org/10.56093/ijas.v90i10.107973.
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Wastewater irrigation with efficient land and water management strategies improve the marketable yield as well as reduce the pollutant threat posed by the irrigation. A field experiment was conducted for two years (2014- 2016) at ICAR- IARI farm, New Delhi to study the effect of municipal wastewater irrigation along with two land configurations (ridge and furrow and basin) and two methods of irrigation (drip and flood) on the yield of eggplant (Solanum melongena cv. Supriya) and soil health. Wastewater irrigated eggplants resulted significantly higher yield (37.1 t/ha), fruit weight (325 g) and fruit diameter (10.02 cm) in the tune of 38, 26 and 7% higher respectively over groundwater irrigated plot. Among irrigation methods, drip irrigation increased yield, fruit weight and fruit diameter of eggplant by 10, 9 and 1% higher over flood irrigation. Significantly higher fruit weight (294 g) of eggplant was recorded with the flat bed system compared to a raised bed system (288 g) and higher yield (4%) was also recorded under a flat bed system over a raised bed system. Wastewater irrigated plots recorded higher plant height, number of branches per plant as compared to groundwater irrigated plants at 120 and 180 days after transplanting. Application of wastewater significantly enhanced available N and P content and DTPA-Pb and Fe in the soil as compared to groundwater irrigated soil. Flood irrigation led to the accumulation of DTPA-Pb and Ni in soil, compared to drip irrigation. Significantly higher dehydrogenase activity, fluorescein diacetate activity and soil microbial biomass carbon were noticed in wastewater irrigated soil as compared to groundwater plots at upper depth (0-5cm). The findings of the present investigation illustrate that wastewater applied through drip irrigation resulted in yield increment as well as reduced metal concentrations in soil.
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McLaughlin, Dave. "A decade of forest tree monitoring in Canada: evidence of air pollution effects." Environmental Reviews 6, no. 3-4 (September 1, 1998): 151–71. http://dx.doi.org/10.1139/a98-008.
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In Canada, the eastern tolerant hardwood forest is potentially at risk from air pollution. Surveys indicate that, overall, the condition of hardwood forests has either not changed or has marginally improved. However, stands growing on shallow, poorly buffered soils have a higher frequency and severity of decline symptoms, and some of these stands have continued to decline, in contrast to the general trend. In Ontario on the most sensitive sites (<6 mequiv. exchangeable bases/100 g), decline symptoms increased coinciding with a decrease in B horizon pH and base saturation and with an exchangeable Al increase. On these sites the chemical analysis of foliage, root, xylem, and soils indicate that nutrient deficiencies, nutrient imbalances, or metal/nutrient antagonism are related to stand decline. There is a consistent spatial relationship between white birch decline in the Bay of Fundy area and acidic sea fog. Acid fog injures and leaches foliage and hastens soil acidification, leaving the stands weakened and making them more sensitive to stress, particularly drought. Some recent studies suggest that forest growth rates are declining and that the relationship with climate has deteriorated, implying that the forests are responding to a regional, nonclimatic, nonpathogenic stress. This could be a response to altered forest nutrient cycling associated with acidic deposition and chronic O3 exposure. A study of sugar maple in Ontario estimated that after the mid-1960s growth has declined between 0.66 and 0.96 m3·ha-1·year-1, and that the decline was greatest on poorly buffered soils. Without enhanced forest management and more stringent air pollution regulations, the sustainability of forest productivity in Eastern Canada is likely to be difficult because of air pollution and soil fertility losses.Key words: dendroecology, acid deposition, ozone, forest decline, sugar maple, climate change.
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Mohamad, Maheera, Nor Hasni Osman, Mohd Kamarul Irwan Abdul Rahim, Ismail Abustan, Mohd Remy Rozainy Mohd Arif Zainol, Kamarudin Samuding, Siti Nor Farhana Zakaria, and Falah Abu. "Potentiality of Pressmud as an Additional Material in Soil Amendments to Enhance Soil Fertility and Strength Ability." Key Engineering Materials 938 (December 26, 2022): 189–200. http://dx.doi.org/10.4028/p-e76z5w.
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In Malaysia, there are some accumulation of sugar refinery byproducts with a lot of this material not being utilized in a productive manner, while, these byproducts had the great potential when mixed into agricultural soils as organic fertilizer with many of benefits that can improve soil health, and sustainable agronomic productivity. Pressmud or known as filter cake is a by-product of sugar industry and for every 100 tons of sugarcane crushed about 3 tons of pressmud cake is left behind as by-product. This studies carried out on this material have not properly summarized their characteristics properties that they can be used as aid for future works. Data from tests involving pressmud samples from Malayan Sugar Manufacturing (MSM) Prai Berhad, Penang which was part of a larger collection was analyzed. The physicochemical properties of pressmud characterization as well as leaching test were carried out. The physicochemical and engineering properties involved compaction behavior, permeability, cation exchange capacity (CEC), compressive stress test and its surface functional groups. The leaching test method included batch equilibrium test and column test. The optimum value of water content in pressmud was determined in the compaction test. It was found out that pressmud has higher optimum water content value was observed. The permeability test of pressmud gave value in ranges of 1.84 x 10-5 cm/s. The Cation Exchange Capacity (CEC) of pressmud indicated value in the range of 99 to 101 meq/100 g. The high cation exchange capacity indicated that pressmud was believed to be primarily responsible for sorption of metal ions. It can be concluded that pressmud having the capability to remove heavy metals through CEC process. Pressmud also showed higher compressive strength value. Batch equilibrium test glaringly showed that pressmud have the capability to remove from 53.6%-93.8% metal removed from metal solutions for Chromium (Cr), Copper (Cu), Manganese (Mn), Nickle (Ni), Lead (Pb) and Zinc (Zn). From the result of column test, pressmud alone was able to retain efficiently all the heavy metals as these metals did not reach 1 (relative concentration) until 10 pore volume (PV.) indicating that pressmud was a good mixture material as it can assist in adsorption of heavy metals. Based on the characterization study, removal efficiency and column test, pressmud has great potentiality to be used as an additional material in soil amendments to enhance soil fertility and strength ability.
Book chapters on the topic "Enhanced metal fertility"
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Akachukwu, Doris, Michael Adedapo Gbadegesin, Philippa Chinyere Ojimelukwe, and Christopher John Atkinson. "Biochar for Climate Change Adaptation: Effect on Heavy Metal Composition of Telfairia occidentalis Leaves." In African Handbook of Climate Change Adaptation, 1401–21. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_202.
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AbstractGas flaring is a key contributor of greenhouse gases that causes global warming and climate change. Adaptation measures for tackling impacts of climate change have gained much research interest. This chapter assessed vegetable farmers’ perception of gas flaring and the effect of biochar remediation on the heavy metal composition of cultivated Telfairia occidentalis. A gas-flared area, Ohaji/Egbema L.G.A of Imo State, and a non-gas-flared area, Umudike, Ikwuano L.G.A, were selected for this research. Structured questionnaire was used to elicit information from 120 respondents. Soils were collected from the study sites and transported to the greenhouse. Five different rates, 0 t ha−1, 7.1 t ha−1, 13.9 t ha−1, 20.9 t ha−1, and 28.0 t ha−1, of palm bunch biochar were applied to the soils in plastic buckets. After 2 weeks of mineralization, two viable seeds of Telfairia occidentalis were planted in each bucket and watered every other day for 8 weeks. The result revealed that 63% of vegetable farmers where female, while 37% were male in the gas-flared area. A total of 97% of the farmers had knowledge of gas flaring. A total decrease of 55% percent income, 90% yield, and 67% market quality of vegetable farmers was attributed to gas-flared activities. The plant height of cultivated vegetables increased every 2 weeks with greater increase in the test plant. Heavy metal concentration (Pb, and Cr) decreased with increasing biochar rate and was significantly lower for 28.0 t ha−1. Biochar can enhance soil fertility and help immobilize heavy metals. The effect of biochar application on the heavy metal composition is dependent on the rate of application. Biochar use could be a cheap adaptation measure in the face of a changing climate.
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Krishnasamy, Selvanayaki, Ramkumar Lakshmanan, and Mythili Ravichandran. "Phytoremediatiation of Metal and Metalloid Pollutants from Farmland: An In-Situ Soil Conservation." In Biodegradation Technology of Organic and Inorganic Pollutants. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.98659.
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Phytoremediation is an effective technology for in-situ remediation of high level polluted soils. Phytoremediation is a plant-mediated approach, which involves the use of plants to absorb and remove elemental pollutants or lower their concentration or bioavailability to soil. Plants have efficacy to absorb compounds in the soil even at low concentration through their root system. Plant root system has geotropism which helps them to extend into the soil matrix and hyper accumulate heavy metals to increase their bioavailability considerably and thereby the polluted soil is domesticated and the soil fertility is enhanced. The heavy-metal-resistant endophytes give the promising effect on plant growth, by decreasing metal phytotoxicity and affecting metal translocation and accumulation in plants. It is an eye opening for researches to implement the phytoremediation of organic contaminants through endophytes that produce various enzymes to metabolize organic contaminants and reduce both the phytotoxicity and evapotranspiration of volatile contaminants. Here, we focus on the most widely used phytoremediation strategies, phytostabilization, phytoextraction, phytovolatilization, and phytofiltration in the remediation of heavy metal-polluted soil.
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Kumar, Amit. "Characteristics of Various Soil Amendments." In Advances in Environmental Engineering and Green Technologies, 1–12. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7940-3.ch001.
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Nutrients play a key role in maintaining soil fertility. Regular use of chemical fertilizers has great impact on soil infertility. Nutrient supply for soil sustainability is the most important step to maintain the fertility and integrity. The enrichment of soil with organic matter could reduce the content of bioavailable metal species as a result of complexation of free ions of heavy metals. The NPK ratio in the soil should be maintained for the good crop yield. There are various organic and inorganic materials available to mix with soil to enhance the soil fertility. Misuse of soil amendment can result not only in damage to crops but can also cause negative impact on soil fertility.
Conference papers on the topic "Enhanced metal fertility"
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Soares, Liliana, and Ermanno Aparo. "The Concept of Tantra as Meta-Design to Create Sustainability." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1001422.
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This article is an ongoing research and takes Tantra (Saraswati, 1981) to present an academic project that refers to the expansion of knowledge, understanding the body of an object through as a supreme shelter link. On the one hand, the female element represents the a whole as the beginning of everything and the supreme power of creation. On the other hand, the male element is associated with transcendence.Similar to designing, from the perspective of tantrism, the union of the two energies - feminine and masculine – is crucial and for this reason, the care of the object's body is essential.Phenomenologically, as Feuerstein (2005) states the tantric point of view does not deny the world of experiences, but views positively the culture of potential intrinsic psychophysical body and mind. This thesis comprises not only time and space, but also the external factors that cross-fertilize reality and, for this reason, enter into design process. In this sense, objects’ body is full of organs, but visible only to designers, requiring guidance from a master.In art, in early 20th century, there were similarities between the abstractions of Paul Klee, Piet Mondrian or Robert Delaunay. After that, Neo Tantrism emerged in the 1960s with the indian artist K. C.S. Paniker (1911-1977).In design, it seems Tantra contest divisions between opposites by teaching that everything is respected and incorporated, which includes the concept of marginal in society. For instance, Bauhaus (Germany, 20’s), Memphis (Italy, 60’s), Droog Design (Netherlands, 90’s) seem to represent it, as this is more about change in the world, via the body, rather than transcendence of it. In design Tantra can be understood as a moment of reflection on the nature of design and an occasion to continually think and get to know design, for instance, a process-oriented process. A reality that enhances scenario hypotheses, but without reaching a productive result.This ongoing research is non-interventionist and interventionist. The non-interventionist phase consists of the analysis and interpretation of concepts, contents from the past as well as visual imagery of Tantra. The interventionist phase resides on a pilot project.Thus, thinking about method in design means thinking about a phenomenological process such as interpretation. A path that is inductive like self-production, deductive like engineering, abductive intelligently linking hypotheses through experience, and also intuitive, imaginative, inventing, telling the story of material culture in another way. An alternative that needs to die and to live again, a process that, between analysis, intuition and experience, appeals to the dialectical reflection of design as an interlocutor between the individual and material culture in order to create sustainability.