scholarly journals EFFECT OF SOIL PREPARATION METHOD ON SOIL TEMPERATURE

2020 ◽  
Vol 2019 (1) ◽  
pp. 231-236
Author(s):  
Kārlis Dūmiņš ◽  
Toms Artūrs Štāls ◽  
Dagnija Lazdiņa
Keyword(s):  
Soil Temperature ◽  
Preparation Method ◽  
Soil Preparation

scholarly journals SEASONALITY OF THE BARK TANNINS CONTENT OF FIVE-YEAR-OLD Acacia mangium TREES GROWN IN NORTHEAST BRAZIL

2021 ◽  
Vol 45 ◽  
Author(s):  
Jaltiery Bezerra de Souza ◽  
Tatiane Kelly Barbosa de Azevêdo ◽  
Alexandre Santos Pimenta ◽  
João Paulo Silva Gomes ◽  
João Gilberto Ucella Meza Filho ◽  
...  
Keyword(s):  
Rainy Season ◽  
Condensed Tannins ◽  
Preparation Method ◽  
Acacia Mangium ◽  
Experimental Treatment ◽  
Hot Water ◽  
Tree Bark ◽  
Preparation Methods ◽  
Significant Difference ◽  
Soil Preparation

ABSTRACT This study aimed to assess the influence of the seasonality on the bark tannins content of Acacia mangium trees grown in the Northeastern Brazilian Region and the effect of soil preparation on the results. Two experimental plots of 1.0 ha each were submitted to different soil preparation methods, with two different intensities. The experimental design consisted of four treatments, two types of soil preparation and, two different bark collection seasons (end of the rainy and dry seasons). The bark of the trees was collected in each treatment and the contents of condensed tannins were determined. For each experimental treatment, 15 trees were harvested and debarked. Bark material was submitted to extraction with hot water, obtaining the total solids content (TSC), Stiasny index (I), and the condensed tannins content (CTC). There was no influence of the soil preparation method on the TSC, I, and CTC. However, there was a significant difference in these parameters for tree bark collected in the rainy season, with higher values. The less intensive soil preparation method is recommended due to its lower cost, and bark should be collected at the end of the rainy season for the best yield of condensed tannins.

scholarly journals Correction to: Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands

New Forests ◽  
2020 ◽  
Vol 51 (5) ◽  
pp. 909-909
Author(s):  
Santa Celma ◽  
Katrīna Blate ◽  
Dagnija Lazdiņa ◽  
Kārlis Dūmiņš ◽  
Santa Neimane ◽  
...  
Keyword(s):  
Root Development ◽  
Preparation Method ◽  
Forest Stands ◽  
Soil Preparation ◽  
Commercial Forest

scholarly journals Effect of soil preparation method on economic result of Norway spruce regeneration chain

Silva Fennica ◽  
2010 ◽  
Vol 44 (3) ◽  
Author(s):  
Karri Uotila ◽  
Juho Rantala ◽  
Timo Saksa ◽  
Pertti Harstela
Keyword(s):  
Norway Spruce ◽  
Preparation Method ◽  
Economic Result ◽  
Soil Preparation

scholarly journals Influence of spot mounding on height growth and tending of Norway spruce: case study in Latvia

2016 ◽  
Vol 65 (1) ◽  
pp. 24-33 ◽  
Author(s):  
Baiba Dzerina ◽  
Sigitas Girdziusas ◽  
Dagnija Lazdina ◽  
Andis Lazdins ◽  
Jurģis Jansons ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Preparation Method ◽  
Forest Type ◽  
Mineral Soil ◽  
Growing Season ◽  
Or Efficiency ◽  
Negative Effect ◽  
Soil Preparation ◽  
Positive Effect

Abstract Norway spruce is commonly regenerated by planting and disc trenching is by far the most widely used soil preparation method in Latvia; however, in specific site conditions other methods might be beneficial. Therefore aim of our study was to assess influence of spot mounding on early growth and tending of Norway spruce in hemiboreal forests. Spot mounding was compared with disc trenching or no soil preparation in central part of Latvia (57° N 24° E) in five different forest types, where two-year-old containerized Norway spruce seedlings were planted. Influence of soil preparation method on tending was assessed in the same region in two different sites in a single forest type on drained fertile mineral soil. Spot mounding had positive effect on the height increment of the dominant trees at the 6th to 8th growing season. Mean height of Norway spruce at the end of 8th growing season on mounds significantly exceeded that on unprepared soil: 179 ± 6.5 and 152 ± 6.2 cm, respectively. Similarly mean height on mounds was significantly larger than on furrows: 209 ± 3.9 and 154 ± 4.0 cm, respectively. Projective vegetation cover before the tending was significantly higher in spot-mounded, but after - in disc trenched sites. Networking time for brashsaw operators in spot-mounded (478 min/ha-1) and disc trenched (462 min/ha-1) sites was similar (p > 0.05). Overall, spot mounding ensured more suitable microenvironment resulting in higher productivity of planted trees and had no negative effect on quality or efficiency of tending, therefore its wider use is recommended.

scholarly journals Influence of the Soil Preparation Method on the Aerial and Root Development of the Clone GT 1 of Hevea brasiliensis, Mull. Arg (Euphorbiaceae) in the South-West of Cote D’ivoire

2020 ◽  
pp. 76-84
Author(s):  
Konan Djézou ◽  
Ballo Espérence Kouadio ◽  
T. Vawa Otro Serge ◽  
P. Kouakou Yao Alban ◽  
Obouayeba Samuel ◽  
...  
Keyword(s):  
Root Development ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Preparation Method ◽  
Cote D’Ivoire ◽  
Land Preparation ◽  
Côte D'ivoire ◽  
Close Relationship ◽  
Cultivation Technique ◽  
Soil Preparation

Objective: The study was carried out on the plots of the Southwest Agricultural Civil Society (SCASO) in southwestern Côte d'Ivoire. the objective of this study is to evaluate the aerial and root development of rubber plants of Gondang Tapen 1 (GT 1) clone, through the method of land preparation Methodology and Results: The methodology focused on plougheds soils of the experimental plots according to a toposequence (summit, mid-slope and low-slope). This treatment was compared with control plots on unploughed soil. The results obtained showed that ploughed soil favoured good aerial development of plants of the GT 1 clone, especially in the lower slopes of plots installed on a toposequence gradient. This cultivation technique also allows a good elongation of the main root of the rubber plants of the GT 1 clone, mainly at the summit and bottom of the toposequence, thus ensuring good fixation in the soil, and thus resistance to windthrow and water supply in the dry season. The study indicated a close relationship between the development of the aerial and underground parts of the GT 1 clone plants on undisturbed (unploughed soil) soils. Conclusion and Application: Evaluation of the influence of the mode of land preparation on the aerial and root development of the GT 1 a clone showed that mechanical soil preparation by ploughed soil in rubber cultivation is an appropriate cultivation technique to boost the development of rubber trees in plantations, when soil characteristics require it.

scholarly journals Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands

New Forests ◽  
2018 ◽  
Vol 50 (2) ◽  
pp. 283-290 ◽  
Author(s):  
Santa Celma ◽  
Katrīna Blate ◽  
Dagnija Lazdiņa ◽  
Kārlis Dūmiņš ◽  
Santa Neimane ◽  
...  
Keyword(s):  
Root Development ◽  
Preparation Method ◽  
Forest Stands ◽  
Soil Preparation ◽  
Commercial Forest

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

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