A comparative evaluation of known liquid humic acid analysis methods

Fataftah, Amjad; Walia, D.S.; Gains, B.; Kotob, Shaban

doi:10.1039/9781847551085-00337

Cited by 6 publications

(7 citation statements)

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“…The seeds were coating with Azotobacter as bio fertilizer at rate 40 kg/fed before sowing, and addition humic acid (coating of seeds) at rate of 5% before sowing. Humic acid composition was determined by using BaCl2 precipitation methods as described by Fataftah et al (2001). The different constituents of the applied humic acid were determined and illustrated in Table (2).…”

Section: Methodsmentioning

confidence: 99%

Effect of Nitrogen, Humic Acid and Bio-Fertilization on Productivity and Quality of Faba Bean Under Saline Condition

Bayoumi¹,

Selim

2012

Journal of Soil Sciences and Agricultural Engineering

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Two field experiments were conducted during 2010/2011and 2011/2012 seasons in saline soil in Galbana Village, Sahl-El Tina (North Sinai), Egypt to study the efficiency of nitrogen, (N) fertilizers or Humic acid either separately or in combination with (N) as well as humic acid associated with Bio-and N fertilization on yield and yield components of two Egyptian faba bean (Vicia faba L.) varieties namely Giza 716 and Sakha 3. Chemical composition, seed quality and some chemical properties of soil were also investigated. The results show that the characters of faba bean plants such as, plant height (cm), 100-seed weight (g), seed yield/plant (g), seed yield (ardab/ fed) and germination %, shoot and radical length (cm), fresh and dry weight of seedling (g), electrical conductivity for seeds (EC) and chemical composition of seeds (Protein and carbohydrate content as %) were significantly by application of the different treatments compared to the control treatment. The Macro elements (N, P and K %) and micro elements concentration (Fe, Mn, Zn and Cu) in seeds and stem were significant increased due to application of the different treatment when compared to the control treatment. Also, the results showed that the treatment of (Humic acid + Bio + N) gave the higher value of seed yield/ plant (62.0 g) compared to control (39.1 g) as well as germination percentage were improved also by application of (Humic acid + Bio + N) (81.0% and 76.7%) compared to treatment control (62% and 59%) in Giza 716 and Sakha 3, respectively. Concerning some chemical properties, the results show that the values of pH of the soil was decreased (8.0 ppm) deu to application of humic acid + N. While the available manganese was increase in soil when this treatment was Also , Application of different treatments enhanced the availability of macro elements such as (N, P and k), maicro elements (Fe, Zn, Mn and Cu) under studied soil.

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Section: Methodsmentioning

confidence: 99%

Effect of Nitrogen, Humic Acid and Bio-Fertilization on Productivity and Quality of Faba Bean Under Saline Condition

Bayoumi¹,

Selim

2012

Journal of Soil Sciences and Agricultural Engineering

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“…Fraksi humat dapat meningkatkan nilai KTK, dan stabilisasi struktur tanah 24) , 2). Fraksi humat dapat mengurangi pengunaan pupuk N dan P(Day et al 6) ; Falatfah et al 8) . Sifat ini karena fraksi humat mampu meningkatkan kemampuan tanah dalam mengikat, menyerap, dan mempertukarkan kation, serta membentuk senyawa komplek dengan logam berat dan tanah lempung, 3).Fraksi humat dilaporkan oleh Thorn 36) , Kelly dan Stevenson 15) , mempunyai arti penting untuk penyuburan tanah dan stabilisasi kandungan nitrogen.…”

Section: Asam Humat Pembenah Tanahunclassified

PROSPEK TEKNOLOGI REMEDIASI LAHAN KRITIS DENGAN ASAM HUMAT (Humic Acid)

Suwahyono

2016

Jurtekling

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The green revolution in the 19th century, has met expectations in an effort to increase the productivity of food supply, in the world at least in Indonesia. In the course of time the green revolution movement has given the systemic impact not only on the degradation of ecosystems, but also the productivity of land, especially paddy fields due to the use of agrochemicals that have been over threshold. The impact on soil in Indonesia become ill, there is a change of soil structure, become poorer and finally lost as the land carrying capacity of production. Systemic Degradation covering 18 000 ha of wetland, contamination levels of heavy metals such as Hg, Fe, Cd, Cu has been on conditions that endanger human health also pesticide has an impact resistance to pests.Recovery efforts of agricultural land, will take time, and cost is not cheap. Various studies have been done, to remediation land by using acid-humic substances, and gives results quite encouraging, because it’s quite effective, efficient and inexpensive, compared with conventional methods is to provide an organic material such as kompost.

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“…Many studies show little or no benefit when humates are applied to the field at recommended rates (for K humate commonly 5-10 kg/ha), which are likely to be too low to be effective [1,3,9,20,44,[47][48][49][50][51]. It is unlikely that, at these rates, there are sufficient quantities of the active components to produce the claimed benefits [52].…”

Section: Are Recommended Application Rates Too Low For Effect?mentioning

confidence: 99%

“…For example: "Humates are now recognised as the single most productive input in sustainable agriculture" [46]. A survey of 10 commercial humic products found that humic acid content varied from advertised levels in some cases by more than 800% [47]. Vendors know they will not be prosecuted, regardless of their claims, and researchers have called for mandatory quality control by regulatory bodies [8].…”

Section: Exaggerated Claimsmentioning

confidence: 99%

“…The issues of inconsistent results, exaggerated claims and unrealistically low application rates highlight the clear need for effective quality control [8,9,20,47], which would be based on in-depth characterisation, physical and chemical (i.e., elemental and spectroscopic analysis [17], of commercial humates. For example, the effective application rate is influenced by the nature of the humate, including the type of organic matter from which it is derived and the extractant used.…”

Section: Future Researchmentioning

confidence: 99%

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Commercial Humates in Agriculture: Real Substance or Smoke and Mirrors?

Lyons

Genç

2016

Agronomy

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Soil humic substances (HS) are known to be beneficial for soils and plants, and most published studies of HS and humates, usually conducted under controlled conditions, show benefits. However, the value of commercial humate application in the field is less certain. This review attempts to answer the question: How effective are commercial humates in the field? Commercial humates, especially K humate, are used widely in agriculture today as "soil conditioners". A wide range of benefits is claimed, including growth of beneficial soil microbes; deactivation of toxic metals; improvements in soil structure including water retention capacity, enhanced nutrient and micronutrient uptake and photosynthesis; resistance to abiotic stress, including salinity; and increased growth, yield and product quality. Despite this, there is a surprising lack of solid evidence for their on-farm effectiveness and findings are often inconsistent. The industry relies largely on anecdotal case studies to promote humates, which are often applied at unrealistically low levels. It is recommended that products should be well characterised, physically and chemically, and that careful field studies be conducted on foliar humate application and pelletised humates at realistic rates, targeted to the seedling rhizosphere, for a variety of crops in a range of soils, including low C sandy and saline soils.

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A comparative evaluation of known liquid humic acid analysis methods

Cited by 6 publications

References 0 publications

Effect of Nitrogen, Humic Acid and Bio-Fertilization on Productivity and Quality of Faba Bean Under Saline Condition

Effect of Nitrogen, Humic Acid and Bio-Fertilization on Productivity and Quality of Faba Bean Under Saline Condition

PROSPEK TEKNOLOGI REMEDIASI LAHAN KRITIS DENGAN ASAM HUMAT (Humic Acid)

Commercial Humates in Agriculture: Real Substance or Smoke and Mirrors?

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