scholarly journals Characterization of soil properties in relation to Shorea macrophylla growth performance under sandy soils at Sabal Forest Reserve, Sarawak, Malaysia

2020 ◽  
Vol 21 (4) ◽  
Author(s):  
Izwaida Che Adanan ◽  
Mohd Effendi Wasli ◽  
Mugunthan Perumal ◽  
Soo Ying Ho
Keyword(s):  
Physicochemical Properties ◽  
Soil Properties ◽  
Growth Performance ◽  
Sandy Soil ◽  
Sandy Soils ◽  
Morphological Properties ◽  
Forest Reserve ◽  
High Conservation ◽  
Study Sites

Abstract. Adanan IC, Wasli ME, Perumal M, Ying HS. 2020. Characterization of soil properties in relation to Shorea macrophylla growth performance under sandy soils at Sabal Forest Reserve, Sarawak, Malaysia. Biodiversitas 21: 1467-1475. A study was conducted in the Sabal Forest Reserve, Sarawak, to characterize soil properties in terms of soil morphological and physicochemical properties under sandy soil at the reforestation site in comparison with High Conservation Forest soil as well as to assess growth performance of planted S. macrophylla under the sandy soil. Study sites with the size of 25 m x 25 m were established under reforestation sites (Early Establishment of Reforestation Site (ER) and Late Establishment of Reforestation Site (LR)) as well as the High Conservation Forests (HCF-1 and HCF-2). The results from soil morphological properties showed that the soils in ER and HCF-2 plots resemble Saratok series while soils in LR and HCF-1 plot were classified into Buso series. As for soil physicochemical properties, soil in all study sites were strongly acidic in nature with pH (H2O) value less than 5.00 with sandy (more than 55%) at both surface and subsurface soil. The survival percentage of planted S. macrophylla in ER and LR plot was 65 % and 56%, respectively. Long term monitoring on soil properties and growth performance of planted S.marophylla tree are essential in order to continuously provide information on the status of reforestation activity.

scholarly journals Preparation, Characterization of Granulated Sulfur Fertilizers and Their Effects on a Sandy Soils

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 612
Author(s):  
Aneta Lisowska ◽  
Barbara Filipek-Mazur ◽  
Józef Sołtys ◽  
Marcin Niemiec ◽  
Olga Gorczyca ◽  
...  
Keyword(s):  
Soil Properties ◽  
Humic Acids ◽  
Soil Ph ◽  
Elemental Sulfur ◽  
Sandy Soils ◽  
Incubation Experiment ◽  
Sulfate Content ◽  
Stabilized Soil ◽  
Sulfur Fertilizers

There is a potential for using sulfur waste in agriculture. The main objective of this study was to design a granular fertilizer based on waste elemental sulfur. Humic acids and halloysite were used to improve the properties and their influence on soil properties. This is the first report on the use of proposed materials for fertilizer production. The following granular fertilizers were prepared (the percentage share of component weight is given in brackets): fertilizer A (waste sulfur (95%) + halloysite (5%)), fertilizer B (waste sulfur (81%) + halloysite (5%) + humic acids (14%)), fertilizer C (waste sulfur (50%) + halloysite (50%)) and fertilizer D (waste sulfur (46%) + halloysite (46%) + humic acids (8%)). Basic properties of the obtained granulates were determined. Furthermore, the effect of the addition of the prepared fertilizers on soil pH, electrolytic conductivity, and sulfate content was examined in a 90-day incubation experiment. Enrichment with humic acids and the higher amount of halloysite increased the fertilizer properties (especially the share of larger granules and bulk density). In addition, it stabilized soil pH and increased the sulfur content (extracted with 0.01 mol·L−1 CaCl2 and Mehlich 3) in the soil.

scholarly journals Variability of Soil Properties along Selected Transects in Mt. Makiling Forest Reserve, Philippines

2016 ◽  
Vol 18 (1) ◽  
Author(s):  
Nicola Louise T. Timbas ◽  
Rodrigo B. Badayos ◽  
Pearl B. Sanchez ◽  
Pompe C. Sta. Cruz
Keyword(s):  
Soil Properties ◽  
Soil Ph ◽  
Base Saturation ◽  
Morphological Properties ◽  
Soil Profiles ◽  
Southern Slope ◽  
Deep Soil ◽  
Forest Reserve ◽  
Exchangeable Bases

A study was conducted to determine the variability of soil properties along selected transects in Mt. Makiling Forest Reserve, Laguna, Philippines. Samples were taken from seven pedons at the northeastern slope, and six pedons at the southern slope. Morphological properties of soils were investigated in situ. Samples were analyzed for their chemical and physical properties. Four landscape positions were identified at the northeastern slope: interfluve, seepage slope, transportational midsope, and colluvial footslope. At the southern slope, three landscape positions were established: interfluve, transportational midslope and colluvial footslope. Soils at the interfluve in both transects had deep soil profiles with low bulk densities and high organic matter. Soils at the seepage slope have argillic horizons, higher soil pH, exchangeable bases, and base saturation. Lithologic discontinuities were observed at the transportational midslope. Soils at the colluvial footslope of the southern slope have higher soil pH, OM content, exchangeable bases, CEC, and base saturation compared to soils at the northeastern slope. Soils at the northeastern slope were classified as Andisols, Inceptisols, Entisols, Ultisols, and Alfisols. On the other hand, soils at the southern slope were classified as Andisols, Alfisols, and Inceptisols.

scholarly journals Association between Soil Fertility and Growth Performance of Planted Shorea macrophylla (de Vriese) after Enrichment Planting at Rehabilitation Sites of Sampadi Forest Reserve, Sarawak, Malaysia

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Mugunthan Perumal ◽  
Mohd Effendi Wasli ◽  
Ho Soo Ying ◽  
Jonathan Lat ◽  
Hamsawi Sani
Keyword(s):  
Soil Fertility ◽  
Soil Properties ◽  
Growth Performance ◽  
Tree Growth ◽  
Secondary Forest ◽  
Growth Parameters ◽  
Available Phosphorus ◽  
Forest Reserve ◽  
Enrichment Planting ◽  
Sandy Clay

A study was conducted to determine the status of soil properties after enrichment planting in comparison to an adjacent secondary forest and to evaluate the effect of enrichment planting of Shorea macrophylla (de Vriese) on the soil fertility status with special reference to Soil Fertility Index (SFI) and Soil Evaluation Factor (SEF) at Sampadi Forest Reserve, Sarawak. The study sites were stands rehabilitated in different years (1996: SM96; 1997: SM97; 1998: SM98; 1999: SM99) and secondary forest (SF). Findings indicated that the soils at rehabilitation sites and SF were strongly acidic in nature, with pH less than 5.50, poor soil exchangeable bases, and nutrient status. The soils were relatively of sandy clay loam to sandy clay. Principal Component Analysis revealed the three most significant components of the soil properties which explained 76.3% of the total variation. At surface soils, SFI was correlated with tree growth parameters of S. macrophylla, indicating that SFI is an applicable soil quality index as compared to SEF. Notwithstanding, a significant association was found between soil available phosphorus and planted S. macrophylla, indicating that soil phosphorus is a better indicator than SFI. Further studies on other environmental factors influencing tree growth performance, early establishment of experimental reforestation at nursery, and field should be implemented to obtain the initial data on seedling growth performance prior to outplanting.

scholarly journals Soil Morphological and Physicochemical Properties at Reforestation Sites After Enrichment Planting of Shorea Macrophylla in Sampadi Forest Reserve, Sarawak, Malaysia

1970 ◽  
Vol 5 (2) ◽  
pp. 28-43
Author(s):  
Mugunthan Perumal ◽  
Mohd Effendi Wasli ◽  
Ho Soo Ying ◽  
Jonathan Lat ◽  
Hamsawi Sani
Keyword(s):  
Physicochemical Properties ◽  
Secondary Forest ◽  
Soil Characteristics ◽  
Total Carbon ◽  
Soil Profiles ◽  
Degraded Forest ◽  
Soil Physicochemical Properties ◽  
Forest Reserve ◽  
Enrichment Planting ◽  
Study Sites

Implementation of effective soil conservation management is required in order to rehabilitate and manage degraded forest land in the tropics. For the humid tropics of Sarawak, Malaysia, extensive information on the soil characteristics for rehabilitation of degraded forest lands is essential to guide future forest management programme. In this study, a preliminary assessment on the current status of the soil morphological and physicochemical properties at one of the reforestation sites in Sarawak which was established after enrichment planting of Shorea macrophylla in comparison to an adjacent secondary forest was conducted. The soil profiles in the study sites were established at the reforestation areas of different age stand (year 1996; SM96, 1997; SM97, 1998; SM98 and 1999; SM99) planted with Shorea macrophylla located in Sampadi Forest Reserve as well as existing secondary forest adjacent to the reforestation sites (secondary forest, SF). Soil profile description was conducted at each study sites and soil samples were collected from each identified soil horizon for determination of the soil physicochemical properties. The results showed that the soils in the study area consisted of mainly grey-white podzolic soils which derived from combination of sandstone, coarse-grained, humult ultisols and sandy residual parent material. According to the Sarawak Soil Classification, the morphological properties in the studied sites resemble of Bako soil series as a dominant unit in association with Saratok series in which, corresponds to Typic Paleaquults of Soil Taxonomy by USDA-NRCS Classification. The general soil physicochemical properties indicated that the soils at both reforestation sites and secondary forest were strongly acidic in nature with pH (H2O) of less than (pH < 5.5) with low nutrient status. The acidic nature of the soils might be ascribed to the presence of high exchangeable Al which concomitantly, increased the level of Al saturation of the studied soils. Observation within each soil profiles indicated that soil acidity decreased with depth, resulting in higher pH (H2O) at deeper horizons for all studied sites. For the soil total carbon and total nitrogen, soils at secondary forest depicted higher values in total carbon and total nitrogen at surface soils as compared to the reforestation sites which indicate large pool of organic matter at surface soil derived from the above vegetation. In terms of the soil physical properties, the soils observed were relatively of sandy texture and did not varied widely among the studied sites. In addition, the soil bulk density at reforestation sites was relatively higher than secondary forest due to higher penetration of roots and accumulation of organic matter contents in secondary forest. Based on the current progress of this study, it is recommended that determination on the soil characteristics should be taken into consideration as an important indicator prior or during the establishment of reforestation area in order to ensure the success of reforestation activity in tropical rainforests.

scholarly journals Effects of Biochar on Properties of Tropical Sandy Soils Under Organic Agriculture

2020 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Nattaporn Prakongkep ◽  
Robert J. Gilkes ◽  
Worachart Wisawapipat ◽  
Parapond Leksungnoen ◽  
Chanida Kerdchana ◽  
...  
Keyword(s):  
Soil Properties ◽  
Sandy Soil ◽  
Aggregate Stability ◽  
Aggregate Size ◽  
Sandy Soils ◽  
Field Capacity ◽  
Exchange Capacity ◽  
Available Phosphorus ◽  
Paired Samples ◽  
Microbial Habitat

This study evaluated the influences of biochar made from local agricultural wastes on sandy soils in farmer fields where biochar has been used as a soil amendment for more than three years. The major objective of this study was to gain insight into the effects of long-term biochar application on properties of sandy soil. Unamended soil properties were compared to biochar-amended soils properties using the paired samples t-test (p &lt; 0.05). The statistical results of the study indicated that cation exchange capacity, exchangeable potassium, available phosphorus, field capacity, plant available water, water-stable aggregate size fractions (&gt; 1 and &lt; 0.25 mm), median aggregate size and aggregate stability were significantly different at p &lt; 0.05. Clearly, biochar present for 3 or more years can improve soil physicochemical properties. We conclude that sandy soil properties, especially soil physical properties, are very strongly affected by biochar application combined with conservative soil management. Biochars affect both physical and biological mechanisms of soil aggregate formation because the biochar particle sizes influence the arrangement of clay on biochar and biochar grains provide a favorable microbial habitat and food source for fungi creating microorganism-biochar-soil associations which enhance water-stable aggregates and water holding capacity.

Characterization of Tamm-Horsfall Urinary Glycoprotein

1973 ◽  
Vol 31 ◽  
pp. 420-421
Author(s):  
John P. Robinson ◽  
J. David Puett
Keyword(s):  
Electron Microscopy ◽  
Circular Dichroism ◽  
Secondary Structure ◽  
Quaternary Structure ◽  
Normal Adult ◽  
Morphological Properties ◽  
Adult Males ◽  
Circular Dichroïsm ◽  
Urinary Glycoprotein

Much work has been reported on the chemical, physical and morphological properties of urinary Tamm-Horsfall glycoprotein (THG). Although it was once reported that cystic fibrotic (CF) individuals had a defective THG, more recent data indicate that THG and CF-THG are similar if not identical.No studies on the conformational aspects have been reported on this glycoprotein using circular dichroism (CD). We examined the secondary structure of THG and derivatives under various conditions and have correlated these results with quaternary structure using electron microscopy.THG was prepared from normal adult males and CF-THG from a 16-year old CF female by the method of Tamm and Horsfall. CF female by the method of Tamm and Horsfall.

Synthesis, Characterization, and Dynamic Behavior of Well-defined Dithiomaleimide-functionalized Maltodextrins

2020 ◽  
Vol 17 (2) ◽  
pp. 85-89
Author(s):  
Francisco J. Hidalgo ◽  
Nathan A.P. Lorentz ◽  
TinTin B. Luu ◽  
Jonathan D. Tran ◽  
Praveen D. Wickremasinghe ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Dynamic Behavior ◽  
Industrial Applications ◽  
19F Nmr ◽  
Nmr Studies ◽  
Synthetic Pathway ◽  
End Groups ◽  
Sugar End

: Maltodextrins have an increasing number of biomedical and industrial applications due to their attractive physicochemical properties such as biodegradability and biocompatibility. Herein, we describe the development of a synthetic pathway and characterization of thiol-responsive maltodextrin conjugates with dithiomaleimide linkages. 19F NMR studies were also conducted to demonstrate the exchange dynamics of the dithiomaleimide-functionalized sugar end groups.

Chemical characterization of tequila maturation process and their connection with the physicochemical properties of the cask

2021 ◽  
Vol 98 ◽  
pp. 103804
Author(s):  
Walter M. Warren-Vega ◽  
Rocío Fonseca-Aguiñaga ◽  
Linda V. González-Gutiérrez ◽  
Francisco Carrasco-Marín ◽  
Ana I. Zárate-Guzmán ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Chemical Characterization ◽  
Maturation Process
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