Release of colloidal biochar during transient chemical conditions: The humic acid effect

2020 ◽  
Vol 260 ◽  
pp. 114068 ◽  
Author(s):  
Yang Wang ◽  
Scott A. Bradford ◽  
Jianying Shang
Keyword(s):  
Humic Acid ◽  
Acid Effect ◽  
Chemical Conditions

Lignite-Derived Humic Acid Effect on Growth of Wheat Plants in Different Soils

Pedosphere ◽  
2011 ◽  
Vol 21 (1) ◽  
pp. 124-131 ◽  
Author(s):  
M.M. TAHIR ◽  
M. KHURSHID ◽  
M.Z. KHAN ◽  
M.K. ABBASI ◽  
M.H. KAZMI
Keyword(s):  
Humic Acid ◽  
Acid Effect ◽  
Different Soils ◽  
Effect On Growth

Effect of humic acid, sodium, and calcium additions on the formation of water-stable aggregates in Western Australian wheatbelt soils

Soil Research ◽  
2004 ◽  
Vol 42 (4) ◽  
pp. 435 ◽  
Author(s):  
T. Yamaguchi ◽  
T. Takei ◽  
Y. Yazawa ◽  
M. T. F. Wong ◽  
R. J. Gilkes ◽  
...  
Keyword(s):  
Humic Acid ◽  
Humic Acids ◽  
Coal Waste ◽  
Experimental Conditions ◽  
Water Stable Aggregates ◽  
Acid Effect ◽  
Anionic Groups ◽  
Positive Effect ◽  
Western Australian ◽  
Selection Of

The effect of humic acids extracted from coal waste and peat on the formation of water-stable aggregates in kaolinitic soils from the wheatbelt of Western Australia and a prepared kaolinite–quartz mix were assessed. This effect was compared with that produced by adding calcium to the soils. In the case of kaolinite–quartz mix, the treated samples were measured for micro-aggregation since macro-aggregates were not formed under the experimental conditions. The wheatbelt soils were already aggregated and the measurement was of the further macro-aggregation of these aggregates. In kaolinite–quartz, calcium additions alone enhanced the formation of stable micro-aggregates. This effect was amplified with additions of humic acids when up to 30% of the clay-sized particles were aggregated into larger aggregates. This humic acid effect was not observed in the sodium dominated mineral system.In contrast to the kaolinite-quartz samples, the selection of wheatbelt soils used in this study responded little to calcium additions alone. Humic acid increased the size of aggregates in the sodium-treated soils presumably due to the presence of aluminium in the system studied at pH 4.5. The aluminium ions can be expected to act as the bridging cations between the negatively charged clay-sized particles and the anionic groups present in the organic matter. The ineffectiveness of calcium in these soils allowed the positive effect of the humic acids to be expressed clearly. These findings provide another management option for improving the soil structure of salt-affected land because some of these soils are unlikely to respond to gypsum application.

Humic acid effect on pyrene degradation: finding an optimal range for pyrene solubility and mineralization enhancement

2007 ◽  
Vol 74 (6) ◽  
pp. 1368-1375 ◽  
Author(s):  
Yanna Liang ◽  
David W. Britt ◽  
Joan E. McLean ◽  
Darwin L. Sorensen ◽  
Ronald C. Sims
Keyword(s):  
Humic Acid ◽  
Optimal Range ◽  
Pyrene Degradation ◽  
Acid Effect

Solubility and fractionation of humic acid; effect of pH and ionic medium

1992 ◽  
Vol 267 (1) ◽  
pp. 47-54 ◽  
Author(s):  
H. Kipton ◽  
J. Powell ◽  
Raewyn M. Town
Keyword(s):  
Humic Acid ◽  
Effect Of Ph ◽  
Ionic Medium ◽  
Acid Effect

scholarly journals Humic Acid Effect on Catalase Activity and the Generation of Reactive Oxygen Species in Corn (Zea mays)

2011 ◽  
Vol 75 (1) ◽  
pp. 70-74 ◽  
Author(s):  
Flávio Couto CORDEIRO ◽  
Claudete SANTA-CATARINA ◽  
Vanildo SILVEIRA ◽  
Sonia Regina de SOUZA
Keyword(s):  
Reactive Oxygen Species ◽  
Zea Mays ◽  
Humic Acid ◽  
Catalase Activity ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Acid Effect

scholarly journals THE GROWTH OF OIL PALM WITH OIL PALM MIDRIB ORGANIC FERTILIZER AND HUMIC ACID

2019 ◽  
Vol 27 (2) ◽  
pp. 71-82
Author(s):  
Mira Ariyanti ◽  
Yudithia Maxiselly ◽  
Santi Rosniawaty ◽  
Rachman Achmad Indrawan
Keyword(s):  
Humic Acid ◽  
Chlorophyll Content ◽  
Palm Oil ◽  
Oil Palm ◽  
Block Design ◽  
Organic Fertilizer ◽  
Experimental Station ◽  
Randomized Block Design ◽  
Chemical Conditions ◽  
Physical And Chemical

Increased productivity of oil palm is a major challenge in Indonesia's oil palm plantations. The application of inorganic fertilizers is still ongoing and requires consideration to reduce its use, given the excessive application can reduce the physical and chemical conditions of the soil. The action that can be done is by utilizing palm oil stem waste and humic acid. This research aims to observe the influence of oil palm midrib organic fertilizer and humic acid with various compositions to the young oil palm. The experiment was conducted from December 2017 to March 2018 in Experimental Station of Ciparanje, Faculty of Agriculture, Universitas Padjadjaran, Sumedang. Experiment used a randomized block design with 9 treatments and 3 replications. The treatments consisted of inorganic fertilizer NPKMg 500 gram/plant, 1600 gram/plant of oil palm midrib compost, 3200 gram/plant of oil palm midrib compost, combination of 1600 gram/plant of oil palm midrib compost and humic acid 15 ml/plant, 20 ml/plant and 45 ml/plant, and the combination of 3200 gram/plant of oil palm midrib compost and humic acid 15 ml/plant, 30 ml/plant and 45 ml/plant. The results of this experiment showed that 3200 gram of oil palm midrib compost and 30 ml of humic acid gave the best influence towards the height plant and chlorophyll content in 4 months after treatment.

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