On the Pigments of Allescheria boydii: Gilberto G. Villela and Amadeu Cury .................. 430 The Coloration of the Tail Tip of Young Fer-de-Lances: Sexual Dimorphism rather than Adaptive Coloration: W. Leslie Burger and Philip W. Smith ............ 431 Molybdenum Deficiency in Dunkirk Silty Clay Loam: G. J. Raleigh .................................. 433 A Simple Apparatus for Producing Dro...

Light penetration through a Drummer silty clay loam and a Broomfield sand was measured spectrophotometrically and biologically. The spectrophotometric measurements showed that less than 1% of the incident light penetrated 2.2 millimeters at any wavelength between 350 and 780 nanometers for ped sizes up to 1 millimeter. Biological measurements with light-sensitive lettuce (Lactuca sativa) seeds ...

The acoustic characteristics of three fine-grained sediments (silty sand, silt, silty clay) in the South China Sea (SCS) were measured and analyzed at high frequency range 27–247 kHz. measurement results show that sound speed dispersion is a positive linear relation range, attenuation follows nonlinear dependence, α = kfn, where n ranges from 0.59 to 0.85 for different SCS. dependence compared ...

Groundwater always plays a vital role in socio-economic development. One of the components groundwater resource potential is recharge from rainfall and surface water. The paper presents finite element modeling moisture transfer simulation unsaturated soils through relationship between soil moisture, suction, permeability, dispersion coefficient. Parameters required for four subsurface types hav...

Thresholding is a digital image analysis method used to distinguish objects from the background in images and it mainly for void density soil. It important select an appropriate thresholding because accuracy of can vary significantly depending on threshold value; however, there currently no standard soil analysis. Therefore, this study proposes prediction. The experimental process involved coll...

Several factors were studied to determine their effects on hatch and emergence of second-stage juveniles (J2) from cysts of Heterodera zeae. The optimum temperature for emergence of J2 from cysts of H. zeae was 30 C. No juveniles emerged from cysts at 10 or 40 C. Immersion of cysts in 4 mM zinc chloride solution stimulated 10% greater emergence of J2 than occurred in tap water controls during 2...

This study carried out on the provided textures at laboratory. The provided textures were infusedinside the PVC cylinder with 30cm height and 25cm diameter. The studied textures were loamysand, sandy loam, sandy clay-loam, clay loam and clay. After 24 hours of saturation, the soil watercontent of the samples was measured by oven-dry gravimetric and TDR methods. For each texturesat any stage of ...