Fig. 1(e) shows an improved test device based on the transient method. Combining the extended Darcy's law and the ideal air state equation, the calculation formula of the transient air permeability model can be derived (Li et al., 2004). Noticeably, since the air density depends on the ...
A high ESP or SAR causes clay minerals and organic matter to disperse, therefore saline–sodic and sodic soils are often characterized by a poor soil structure which can result in high soil density, clogging of pores and surface crusts, making the soils impermeable to air and water. Although ...
Al-, Mn- and Fe-oxyhydroxides have variable charged surfaces (amphoteric) that acquire a positive charge density when the pH is more acidic than the mineral’s point of zero net charge density [39, 40]. Uranyl ions, along with its hydroxyl monomers...
Variability of the first-order decomposition kinetics Our results revealed a significant difference in the fast-pool reference decomposition rate (k1ref) between the two-pool model (M2) and the three-pool model (M3) as per the Kruskal-Wallis (KW) test (p < 0.001, Figs.1b and1c), b...
Meigh AC, Skipp BO (1960) Gamma-ray and neutron methods of measuring soil density and moisture. Geotechnique 10(3):110–126 ArticleGoogle Scholar Merela M, Oven P, Sers I, Mikac U (2009) A single point NMR method for an instantaneous determination of the moisture content of wood. Holzf...
While not statistically significant, quantitative measures of soil quality; bulk density, water stable aggregates (WSA) and overall soil fertility (OFS), mirrored the trends in the YSZ separation of in-field heterogeneity. The components of SHS capture these trends with SLAN significantly different ...
Life on Earth is sustained by a small volume of soil surrounding roots, called the rhizosphere. The soil is where most of the biodiversity on Earth exists,
What LEDs should I test next? I’ve tried just about every other type of grow light over the years. They all have pluses and minuses. Fluorescents like T5s are perfect for young plants and produce good quality buds, but the plants need to be well trained to get the best density and...
where h represents soil sampling depth (meter), and BD represents soil bulk density (Mg/m3). SOC sequestration rate (SOCseq) was calculated in terms of (Mg/ha/yr) using: $${SOC}_{seq}=({SOC}_{cc}-{SOC}_{background}){\div}y$$ (5) where SOCcc is the soil carbon stocks und...
A total of six seepage tests are performed on medium dense sand specimens with an initial relative density (Dr) of 50% at p'i of 50 kPa. The test results are summarised in Table 3. The variation in finer fractions for each test, caused by internal erosion, is summarised in Table 4...