Can Soil Penetration Resistance and Bulk Density Be Determined in a Single Undisturbed Sample?

Swelling Bulk Density and its Application in Arya and Paris Model for Soil Moisture Curve Prediction

Can optimized effective potentials be determined uniquely?

Local ~multiplicative! effective exchange potentials obtained from the linear-combinationof-atomic-orbital ~LCAO! optimized effective potential ~OEP! method are frequently unrealistic in that they tend to exhibit wrong asymptotic behavior ~although formally they should have the correct asymptotic behavior! and also assume unphysical rapid oscillations around the nuclei. We give an algebraic pro...

Marine microbial diversity: can it be determined?

Estimates of the order of magnitude for the total number of microbial species on Earth range from 10(3) to 10(9). Despite global dispersal of microorganisms, this number is probably rather large. The total biodiversity of an ecosystem is composed of two elements: first, a set of abundant taxa that carry out most ecosystem functions, grow actively and suffer intense losses through predation and ...

A Dynamic Cone Penetrometer for Measuring Soil Penetration Resistance

ters to characterize both agricultural and rangeland A DYNAMIC CONE PENETROMETER soils, however, has been limited by concerns about (i) FOR MEASURING SOIL instrument cost, (ii) measurement repeatability, (iii) limited ranges of soil resistance that can be measured by PENETRATION RESISTANCE a single penetrometer, and (iv) difficulties in comparing Jeffrey E. Herrick* and Tim L. Jones data collec...

Bulk Density of Rocky Mine Soils in Forestry Reclamation Soil

doi:10.2136/sssaj2011.0380 Received 7 Nov. 2011. *Corresponding author ([email protected]). © Soil Science Society of America, 5585 Guilford Rd., Madison WI 53711 USA All rights reserved. No part of this periodical may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without per...