Significantly more occlusion bodies (OB) of DuPont viral construct HzSNPV-LqhIT2, expressing a scorpion toxin, were transported by artificial rainfall to cotton plants from sandy soil (70:15:15 sand-silt-clay) than from silt (15:70:15) and significantly more from silt than from clay (15:15:70). The amounts transported by 5 versus 50 mm of precipitation were the same, and transport was zero when...

Soil texture is a key soil property influencing many agronomic practices including fertilization and liming. Therefore, an accurate estimation of essential for adopting sustainable management practices. In this study, we used different machine learning algorithms trained on vis–NIR spectra from existing spectral libraries (ICRAF LUCAS) to predict textural fractions (sand–silt–clay %). addition,...

First posted June 5, 2023 For additional information, contact: Director, Florence Bascom Geoscience CenterU.S. Geological Survey12201 Sunrise Valley DriveReston, VA 21092Contact Pubs Warehouse The age and source of the late Pleistocene Roxana Silt in Mississippi have been studied since middle 1800s. Published paleoenvironmental data for show that deposition occurred from marine isotope stage 5 ...

soil erosion causes sediments to be detached from their source materials and transported as suspended particles. the present study was conducted to evaluate the effects of sand exploitation on the distribution of suspended sediments in the educational and research forest watershed of tarbiat modares university, which comprises approximately 50,000 ha. fifty-one water samples were collected befo...

Median grain sizes on riverbeds range from boulders in uplands to silt in lowlands; however, rivers with ~1–5mm diameter bed sediment are rare. This grain size gap also marks an abrupt transition between graveland sand-bedded reaches that is unlike any other part of the fluvial network. Abrupt gravel-sand transitions have been attributed to rapid breakdown or rapid transport of fine gravel, or ...