Transformation of rock phosphate during composting and the effect of humic acid

Bangar, K. C.; Yadav, Kalpana; Mishra, M.M.

doi:10.1007/bf02139630

Cited by 49 publications

(12 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies have shown that the effectiveness of PR is largely determined by the extent of dissolution of PR in moist soil. Dissolution of PR is influenced by many factors, including pH and pH buffering capacity of soil, soil texture, humic acid, P status such as available P and P-retention capacity, calcium (Ca) status such as calcium exchange capacity and exchangeable Ca, root systems, and the presence of arbuscular mycorrhizal (AM) fungus (Bangar et al 1985; Kanabo and Gilkes 1988;Robinson and Syers 1990;Acea and Carballas 1990;Bolland et al 2001; Barea et al 2002;Sikora 2002). Simple and multiple regression analysis of experimental data indicated that no single soil property adequately predicts PR dissolution in the soil, which supports the conclusions of several investigators for many soils from several countries Gilkes 1986, 1994;Wright et al 1992;Bolland et al 2001).…”

Section: Introductionmentioning

confidence: 97%

Analysis of Phosphate Rock Dissolution Determining Factors Using Principal Component Analysis in Some Acid Indonesian Soils

Hilman¹,

Anuar

Hanafi

et al. 2007

Comm. in Soil Sc. & Plant Analysis

View full text Add to dashboard Cite

Dissolution of phosphate rock (PR) materials and its subsequent phosphorus (P) availability to plants depend upon soil characteristics, PR characteristics, type of crops, and environmental conditions. Agronomic effectiveness of the PR sources has frequently been investigated in the field or in the greenhouse. This is time consuming and not cost-effective. Therefore, identification of the soil characteristics influencing the dissolution of PR is very important for direct application of P sources. The principal component analysis was used to summarize the characteristics of acid soils in an incubation system into a number of factors that may affect PR dissolution. Three major factors were selected in this study: 1) soil texture, 2) soil acidity, and 3) fertilization. Using the scores of the individual factors as independent variables, a stepwise regression analysis was performed to derive a PR dissolution function. The coefficient of determination (R 2 ) reached 0.91 ÃÃ , and the magnitude of the different factors affect PR dissolution following the order of soil texture (54%) . soil acidity (43%) . fertilizer (3%). Fertilizer was not significant as a PR dissolution factor.

show abstract

Section: Introductionmentioning

confidence: 97%

Analysis of Phosphate Rock Dissolution Determining Factors Using Principal Component Analysis in Some Acid Indonesian Soils

Hilman¹,

Anuar

Hanafi

et al. 2007

Comm. in Soil Sc. & Plant Analysis

View full text Add to dashboard Cite

show abstract

“…Use of composts of RPs with agricultural wastes is known to increase solubility of rock phosphates (Akande et al, 2008;Singh & Amberger, 1990). The degree of solubilization of phosphorus of a given RP varies with the kind and the rate of decomposition of the organic material used (Bangar et al, 1985). Grain yields of maize and cowpea from P-treated plots were significantly higher than from untreated plots (Akande et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Growth and Yield of Okra with Rock-Phosphate – Amended Organic Fertilizer

Makinde¹

2013

JAS

View full text Add to dashboard Cite

Phosphorous supply from organic manures for okra production can be insufficient for optimal fruit yield. The growth and yield of okra (Variety: NHAe 47-4) were assessed in field experiments with an organic fertilizer made from cowdung (CD), fortified with Ogun Rock Phosphate (ORP). The ORP was applied sole at 100 kg ha -1 and also with each of 2.5; 5.0; 7.5 and 10.0 t ha -1 cowdung. There was a standard check of NPK 20-10-10 applied 2 weeks after planting at 400 kg ha -1 and an unfertilized control., Average number of leaves per plant, stem diameter and plant height were all similar, with 4 weeks growth. Average plant leaf area was however higher with ORP added to either 7.5 or 10.0 t ha -1 CD, relative to either sole ORP or the unfertilized treatments. At 8 weeks after planting, plant height was highest with 10.0 t ha -1 CD + ORP and was comparable only with plants from 7.5 t ha -1 CD + ORP application. Plant stem girths were similar with all ORP applications. Number of leaves per plant and average leaf area were highest with 10.0 t ha -1 CD + ORP. Applications of 2.5; 5.0 and 7.5 t ha -1 CD + ORP had comparable leaf areas. Application of 10.0 t ha -1 CD + ORP gave the highest okra fruit yield which was comparable with yields from 2.5; 5.0 and 7.5 t ha -1 CD +ORP that ranged from 2.92 to 3.05 t ha -1 . Pod length and pod circumference were significantly higher with ORP + 10.0 or 7.5 t ha -1 CD. Plants from the unfertilized control treatment had significantly shorter pods with lower circumference than all the fertilized plants. Okra fruit yield is significantly increased with organic fertilizer fortification with ORP.

show abstract

“…It also renders plant nutrients available from soil minerals. Datta and Nagar (1968), Sinha (1972), and Bangar et al (1985) have reported that soil organic matter provides available P by solubilizing calcium phosphate, ferric phosphate, and aluminum phosphate. During the decomposition of organic matter in soils, organic acids are produced, which may either influence the pH and, consequently, make P available from calcium phosphate, or which may complex or chelate cations and thus release the phosphate.…”

Section: Introductionmentioning

confidence: 97%

Humification of organic matter in soil affecting availability of phosphorus from its mineral compounds

Khalil

El-Shinnawi

1989

Arid Soil Research and Rehabilitation

View full text Add to dashboard Cite

Release of available P from insoluble phosphate compounds (basic slag and rock phosphate) during humification of clover hay in a clay alluvial soil (pH 7.9) was studied at 60% water-holding capacity and at 20 ± 2°C for a period of 180 days. Content of total humified carbon in soil treated with insoluble phosphate compounds was higher than that in P-untreated soil. Humic acid predominated over fulvic acid in all treated soils. Ratio of HAIFA was always >1.0, and it decreased following the application of organic material and of inorganic P compounds. Presence of basic slag diminished the HAIFA ratio more than did the rock phosphate. Humic-substance associated P and available P contents increased with the addition of organic material and of insoluble phosphate compounds. The content of both forms of P in the humic substances was higher in the presence of basic slag than in the presence of rock phosphate.

show abstract

Transformation of rock phosphate during composting and the effect of humic acid

Cited by 49 publications

References 3 publications

Analysis of Phosphate Rock Dissolution Determining Factors Using Principal Component Analysis in Some Acid Indonesian Soils

Analysis of Phosphate Rock Dissolution Determining Factors Using Principal Component Analysis in Some Acid Indonesian Soils

Growth and Yield of Okra with Rock-Phosphate – Amended Organic Fertilizer

Humification of organic matter in soil affecting availability of phosphorus from its mineral compounds

Contact Info

Product

Resources

About