A Simplified Method for Laboratory Soil Analysis

chaouqi, nora

doi:10.21660/2017.34.2706

Cited by 2 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…42 filter paper. P concentration was determined by inductively coupled plasma atomic emission spectroscopy (ICP-AES); blank and standards were prepared in Olsen P extracting solution (Chaouqi et al 2017).…”

Section: Physico-chemical Analysis Of Soilmentioning

confidence: 99%

Influences of forest gaps on soil physico-chemical and biological properties in an oriental beech (Fagus orientalis L.) stand of Hyrcanian forest, north of Iran

Amolikondori¹,

Vajari²,

Feizian³

et al. 2020

iForest

View full text Add to dashboard Cite

Understanding the effects of silvicultural practices including single-tree selection on soil properties is essential for forest management in temperate broadleaved beech forests. Changes in physico-chemical and biological soil properties in 15 harvest-created gaps under single-tree selection and the adjacent closed canopies, with five replications for each, were studied 6 years after gap creation in an oriental beech (Fagus orientalis L.) stand of the Hyrcanian forest. Gaps were classified into three size classes: small (85-130 m 2 ), medium (131-175 m 2 ) and large (176-300 m 2 ). Soil cores were collected at the center and at the edge of gaps, and under the adjacent closed canopy. Results indicated that gap size significantly affected soil texture and bulk density, whereas soil organic carbon (SOC), total nitrogen and pH showed a significant gradient from the center to the edge of gap independently form their size. SOC and total nitrogen at the center of gaps were also significantly lower than closed-canopy, in particular for the medium-gap; contrastingly, the bulk density with the highest mean value was found at the center of the large-gap. Gap size had no significant influence on soil microbial biomass. These results highlighted that similar conditions in terms of many soil properties were still present among gaps and adjacent closed-canopy stands six years after logging, though canopy openness triggered a reduction in carbon and nitrogen availability along with the related microbial activity at the center of gaps, independently from their size. Therefore, if aimed at preserving an uneven aged structure along with soil quality in temperate broadleaved deciduous forest as the oriental beech stands in the Hyrcanian region, single-tree selection practice for harvesting trees can be recommended as sustainable forest management type.Citation: Amolikondori A, Abrari Vajari K, Feizian M, Di Iorio A (2020). Influences of forest gaps on soil physico-chemical and biological properties in an oriental beech (Fagus orientalis L.) stand of Hyrcanian forest, north of Iran.

show abstract

Section: Physico-chemical Analysis Of Soilmentioning

confidence: 99%

Influences of forest gaps on soil physico-chemical and biological properties in an oriental beech (Fagus orientalis L.) stand of Hyrcanian forest, north of Iran

Amolikondori¹,

Vajari²,

Feizian³

et al. 2020

iForest

View full text Add to dashboard Cite

show abstract

“…Phosphorus causes early maturation in plants, decreases grain mold, increases leaf chlorophyll content and may positively affect photosynthesis, thus improving crop quality (Altieri, 1995;Maene, 2000). However, the availability of this nutrient for plants is limited by different chemical reactions (formation of strong links between phosphorus with Ca 2 + and Mg 2+ in alkaline pH and the same links with Fe 2 + and Al 3 + in acid soils (Chaouqi et al, 2017)) (Compaoré et al, 2001) ; (Malakooti, 2000). Thus, by certain agricultural practices such as the excessive application of chemical phosphate fertilizer, a large proportion of phosphorus in chemical fertilizer becomes unavailable for plants after its application in the soil (Tremblay et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The Improvement of TSP Fertilizer Production & Quality

chaouqi

Gharous

Bouzziri

2017

Preprint

Self Cite

View full text Add to dashboard Cite

Results obtained showed that some essential manufacturing factors needs to be respected throughout the production loop. These factors will help obtaining a slurry exits with the desired chemical characteristics of P 2 O 5SE (33%), Al (10%), P 2 O 5SE + Citrate (34.5%), H 2 O (22%), P 2 O 5total (39%)). It is necessary to keep a temperature within 100 ± 5 ° C., with a vapor pressure of 6 to 7 bars, an average density of H 3 PO 4 (1470 g/l) and the solid rate in the feed acid less than 2%. After the reaction phase, the slurry is conveyed to the granulator where it is mixed with the recycled product at a recycling rate (RT) close to 3 and a K ratio between 0.1 and 0.2. This parameter is very important to be monitored to ensure a Good penetration of heat into the next phase in a relatively short time. During the drying process, the product humidity at the outlet must be in the range of 3.5% to 5% to allow the reaction to continue during the developing period. At the exit of the drying tube, the product is in very variable grains diameter (D), the objective of the following step is to extract the grain size range between 2 and 4 mm. To do so we changed the mesh size of the lower webs to 3/50 and 3.2 / 30 mm, which reduces the quantity of particle size less than 2%. Thus, the particles of diameter more than 3.15 mm must be continuously controlled to reach 64%. This portion will ensure conformity of the product for D 50 and for the two intervals [2-3.15 mm] and [3.15-4 mm]. In the Storage Hall the reaction continues, the unconverted phosphate will be attacked by the unreacted H 3 PO 4 , and according to a monitoring of the evolution of the chemical composition of the final product (TSP). The required ripening time is limited to 21 days. During this study, we were able to identify and modify a number of parameters in different production phases to improve the quality of TSP according to AFCOME, knowing that each phase of the process is a client of the previous phase and supplier of the next one.

show abstract

A Simplified Method for Laboratory Soil Analysis

Cited by 2 publications

References 4 publications

Influences of forest gaps on soil physico-chemical and biological properties in an oriental beech (Fagus orientalis L.) stand of Hyrcanian forest, north of Iran

Influences of forest gaps on soil physico-chemical and biological properties in an oriental beech (Fagus orientalis L.) stand of Hyrcanian forest, north of Iran

The Improvement of TSP Fertilizer Production & Quality

Contact Info

Product

Resources

About