EurekaMag.com logo
+ Site Statistics
References:
48,252,460
Abstracts:
22,798,453
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Quantifying tillage erosion rates due to moldboard plowing


, : Quantifying tillage erosion rates due to moldboard plowing. Soil & Tillage Research 24(3): 243-255

Tillage erosion, the movement of soil downslope by mechanical implements, has been recognized as a problem, but primarily in a qualitative manner. This study was initiated to quantify soil movement by tillage on a hillslope landscape by computer simulation of long-term moldboard plowing. Regression equations describing soil movement as affected by slope gradient were developed from a hillslope at the University of Minnesota Southwest Experiment Station [USA] where individual plots could be located on the frontslope, apex, and backslope. Based on these equations, yearly soil movement calculations were made for a moldboard plowing operation over two hillslope landscapes. The first landscape was generated to give concave, linear, and convex slope gradients. The second landscape was a measured line segment from the experimental site. From a starting elevation and slope, one-dimensional calculations were based on forward moment of soil blocks, 0.24 m (plow depth) .times. 0.46 m (plow share width) .times. 1.5 m) increment length), over the shillslope to simulate 1 year's moldboard plowing. Elevation and slope of each soil block position was recalculated, and forward movement was then calculated in the opposite direction to simulate the next year's plowing. This process was continued to simulate 100 years of moldboard plowing at opposing direction during alternate years. Results from this analysis showed that a net loss in soil will occur on convex slope positions (tillage erosion), soil accumulation will occur in concave slope positions, and little change occurs in linear slope positions regardless of slope gradient. Calculated average annual net soil movement rates away from convex slope position were up to 30 t ha-1 year-1 and could easily account for the presence of observed lighter colored soil in convex slope positions on many landscapes. The magnitude of net soil movement calculated strongly suggests that soil movement by tillage is a serious problem.

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 002200527

DOI: 10.1016/0167-1987(92)90090-x

Download PDF Full Text: Quantifying tillage erosion rates due to moldboard plowing


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Ferreira, Psf, 1995: Jose C.M. Carvalho: a students remembrance. Proceedings of the Entomological Society of Washington 97(2): 240

Ray, R.; Capecchi, M., 2008: An examination of the Chiropteran HoxD locus from an evolutionary perspective. Duplications of Hox gene clusters have been suggested as a mechanism whereby new Hox functions can be developed while preserving critical ancestral roles. However, in tetrapods, particularly in mammals, there is great variability in limb structure...

Bentz, C.J.; Bayley, K.Bruce.; Bonin, K.E.; Fleming, L.; Hollis, J.F.; McAfee, T., 2006: The feasibility of connecting physician offices to a state-level tobacco quit line. Background: Telephone counseling for tobacco cessation is an effective and evidence-based approach to address tobacco use. The wide dissemination of region- and state-level quit lines has been a major goal for public health agencies. However, conn...

Abalos B.; Eguiluz L., 1992: The late Proterozoic suture zone of SW Iberia; a link for the reconstruction of the Cadomian-Avalonian-Panafrican transpressive orogen of the Circum-Atlantic region. Comptes Rendus de l'Academie des Sciences, Serie 2, Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre 314(7): 691-698

Suzuki, T.; Ishikawa, K.; Sato, N.; Sakai, K.I., 1979: Determination of chlorinated pesticide residues in foods. I. Rapid screening method for chlorinated pesticides in milk. A rapid analytical method for determining chlorinated pesticide residues in milk was developed. Thirteen pesticides were almost completely extracted. Ten mL samples of fortified milk were extracted 3 times with 20 mL portions of n-hexane as follow...

Hary, M.; Grivu, O.; Paitici, M., 1966: Oro-antral communications following tooth extraction. Zahnarztliche Welt, Zahnarztliche Rundschau, Zwr, Vereinigt Mit Zahnarztliche Reform 67(22): 789-792

Zajac, J. L., 1956: Depth perception of double images in the vicinity of other images. Four situations were investigated: double images in the vicinity of fixation objects, fixated binocularly; in the vicinity of the images of the other eye; in the vicinity of the images of the same eye and in the vicinity of stereoscopic images for...

Dispenzieri, A., 2002: Symptomatic cryoglobulinemia. 1. Treatment of symptomatic cryoglobulinemia is exceedingly challenging due to the multisystemic nature of its presentation, the variability of its course, and the paucity of effective therapeutic options supported by randomized controlled clinica...

Mather, J.L.; Bayliff, C.D.; Paterson, N.A.M., 1993: Hypothyroidism secondary to iodinated glycerol. Canadian Journal of Hospital Pharmacy 46(4): 177-178

Hou, C-Jin.; Hu, X-Ping., 2016: Sterically Hindered Chiral Ferrocenyl P,N,N-Ligands for Highly Diastereo-/Enantioselective Ir-Catalyzed Hydrogenation of α-Alkyl-β-ketoesters via Dynamic Kinetic Resolution. NlmCategory="UNASSIGNED">A new class of sterically hindered chiral ferrocenyl P,N,N-ligands have been prepared through a two-step transformation from (S<sub>c</sub>,R<sub>p</sub>)-PPFNH<sub>2</sub>,...