scholarly journals Physicochemical Changes in Loam Soils Amended with Bamboo Biochar and Their Influence in Tomato Production Yield

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2052
Author(s):  
Karolina Villagra-Mendoza ◽  
Federico Masís-Meléndez ◽  
Jaime Quesada-Kimsey ◽  
Carlos A. García-González ◽  
Rainer Horn
Keyword(s):  
Cation Exchange ◽  
Water Content ◽  
Cation Exchange Capacity ◽  
Water Retention ◽  
Exchange Capacity ◽  
Tomato Production ◽  
Available Water ◽  
Available Water Content ◽  
Tomato Yield ◽  
Air Capacity

Soil degradation and water stress in Costa Rica challenge the production of highly sensitive crops. This work is aimed at evaluating the physical and chemical changes in sandy loam (SL) and a silt loam (SiL) soil when amended with bamboo biochar while estimating the enhancement of tomato productivity. Biochar, obtained from Guadua Angustifolia bamboo feedstock, was mixed into sieved bulk soil substrate from the topsoil, from Andosol and Umbrisol groups, at application rates of 1, 2.5, and 5% (dry mass). Physicochemical and morphological properties of biochar such as pH, hydrophobicity, scanning electron microscopy images, helium picnometry, specific surface area by the Brunauer–Emmett–Teller (BET) method, CHNS, and ash content were determined. Soil hydrophobicity, acidity, electrical conductivity, cation exchange capacity and water retention, available water content, and air capacity were analyzed for the amended soils. Tomato yield was quantified after a harvest period of two months. The admixture of biochar did not significantly increase soil cation exchange capacity but increased water retention in the range of available water content. Class A (>200 g) tomato yield increased 350% in the SL and 151% in the SiL. Class B (100–200 g) tomato yields increased 27% in the SL but decreased about 30% in the SiL. Tomato yield response seems attributable to variation of water retention capacity, available water content, and air capacity. These results support the use of adapted water management strategies for tomato production based on soil physical changes of biochar.

Influence of organic waste amendments on selected soil physical and chemical properties

1999 ◽  
Vol 79 (3) ◽  
pp. 501-504 ◽  
Author(s):  
B. J. Zebarth ◽  
G. H. Neilsen ◽  
E. Hogue ◽  
D. Neilsen
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Cation Exchange ◽  
Bulk Density ◽  
Soil Water ◽  
Cation Exchange Capacity ◽  
Water Retention ◽  
Organic Waste ◽  
Soil Bulk Density ◽  
Exchange Capacity

Sandy, infertile soils can benefit from the addition of organic waste amendments. Annual applications of organic wastes for as long as 4 yr increased soil organic matter content, decreased soil bulk density, and increased soil water retention of a coarse-textured soil. However, soil water-holding capacity was not necessarily increased, and there was a limited effect on soil cation exchange capacity. Key words: Cation exchange capacity, water retention, soil pH, soil organic matter, soil bulk density

scholarly journals Habitat of Spathoglottis plicata Bl in Forest of Kampung Woniki East Biak District, Biak Numfor Papua

2010 ◽  
Vol 7 (1) ◽  
Author(s):  
Yuliany Senga ◽  
C. Y. Hans Arwam ◽  
Nurhaida I. Sinaga
Keyword(s):  
Light Intensity ◽  
Cation Exchange ◽  
Carbon Content ◽  
Water Content ◽  
Air Temperature ◽  
Soil Ph ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Font Size ◽  
Plant Site

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> <w:UseFELayout /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if !mso]><object classid="clsid:38481807-CA0E-42D2-BF39-B33AF135CC4D" id=ieooui></object> <mce:style><! st1\:*{behavior:url(#ieooui) } --> <!--[endif]--> <span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;;">The research was aimed to figure out the ecology aspects of terrestrial orcid </span><em><span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;;">S. plicata </span></em><span style="font-size: 10pt; font-family: &quot;Times New Roman&quot;;">in natural forest around Kampung Wonoki, East Biak. The result showed that <em>S. plicata </em>Grow on latosol soil with is structure very from loamy clay to loamy, colour of soil red to dark brown. Soil water content between 42,9-56,2 %, soil pH 5,0-6,4, Cation Exchange Capacity (CEC) 6,20-20,30 meq/100 gram, Base Saturation 10,0-68,0 %. Carbon content 0,20-0,69 %, Nitrogen 0,02-0,09 %, Phospor 0,3-21,3 ppm, Potasium 0,00-1,17 meq/100 gram, Calsium 0,77-11,78 meq/100 gram, Magnesium 0,15-1,11 meq/100 gram, and Sodium 0,00-0,13 meg/100 gram. Air Temperature Around site of plant site 26,5-42,3 <sup>0</sup>C, Air Moisture 49,0-82,0 % and Light Intensity 119-1228 lux.</span>

scholarly journals Physical and Chemical Properties of Media Suitable for Containerized Bare Root Whip Production

1996 ◽  
Vol 14 (3) ◽  
pp. 137-141
Author(s):  
Daniel K. Struve ◽  
Edward L. McCoy
Keyword(s):  
Cation Exchange ◽  
Bulk Density ◽  
Cation Exchange Capacity ◽  
Water Retention ◽  
Exchange Capacity ◽  
Height Growth ◽  
Pine Bark ◽  
Red Oak ◽  
Rice Hulls ◽  
Bare Root

Abstract Moisture retention characteristics, pH, cation exchange capacity (CEC) and bulk density of media suitable for containerized bare root whip production and the effects of these media on red oak (Quercus rubra L.) and blackgum (Nyssa sylvatica Marsh.) growth were studied. Media tested were: 3:1:1, 2:1:2 and 2:2:1 (by vol) sand:composted municipal sewage sludge [Comtil]:Isolite or zeolite. A similar series of media were prepared by substituting rice hulls for sand. Similar physical properties were determined for three media components: rice hulls, Comtil and pine bark. Rice hulls and Comtil had high water retention at container capacity, 70.1 and 85.4%, respectively. Thus, substituting rice hulls for sand increased media water retention at container capacity and total plant available water. Media pH ranged from 4.9 (2:1:2 and 2:2:1 rice hulls:Comtil:zeolite) to 6.3 (3:1:1 sand:Comtil:zeolite). Rice hulls and Comtil had bulk densities similar to pine bark (0.30 and 0.32, respectively vs. 0.35 g cm−3); thus, medium bulk density was lower when rice hulls were substituted for sand. Rice hull-based media cation exchange capacity was higher than sand-based media. There were no differences in red oak height growth in the different media; height growth averaged 72 cm (28 in). Blackgum height was greatest (138 cm, 54 in) in 2:2:1 rice hull:Comtil:zeolite medium. The results demonstrate that rice hulls could be substituted for sand without reducing height growth of either species. When grown in the different bare root media, red oak and blackgum seedlings could be bare rooted by hand shaking. The root systems of both species were fibrous with many roots with intact root tips.

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