Zobrazeno 1 - 10
of 64
pro vyhledávání: '"J.B. Swan"'
Publikováno v:
Soil and Tillage Research. 40:55-72
In the northern US Corn Belt, plant residue retained on the soil surface increases risk of poor stand establishment and growth of corn (Zea mays, L.). This limits adoption of no-tillage and other conservation tillage systems which are effective in re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02f05172f50c9b86a0b18a8f7dbce672
https://doi.org/10.1016/s0167-1987(96)80006-7
https://doi.org/10.1016/s0167-1987(96)80006-7
Autor:
N. C. Wollenhaupt, D. C. Erbach, J. L. Jordahl, E. C. Berry, J.B. Swan, Neal S. Eash, D. L. Karlen
Publikováno v:
Soil and Tillage Research. 32:313-327
Public interest in soil quality is increasing, but assessment is difficult because soil quality evaluations are often purpose- and site-specific. Our objective was to use a systems engineering methodology to evaluate soil quality with data collected
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49f307a1ef2fc3ad2fec604a7411f168
https://doi.org/10.1016/0167-1987(94)00427-g
https://doi.org/10.1016/0167-1987(94)00427-g
Publikováno v:
Soil and Tillage Research. 31:211-224
Limited information exists on the use of dairy manure in conservation tillage systems. Thus, a study was conducted during 1982–90 in southeast Minnesota, USA, to investigate the potential for using liquid dairy manure as an N source for corn ( Zea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ee319049b36bd5c752ce441aa2e4451
https://doi.org/10.1016/0167-1987(94)90081-7
https://doi.org/10.1016/0167-1987(94)90081-7
Publikováno v:
Soil and Tillage Research. 31:225-233
Deterioration of ground and surface water quality has often been associated with failure to properly account for nitrogen (N) from manure and legumes in crop production. The objective of this study was to evaluate the effects of tillage, N source, an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46f45489157d1fb9d8d3257fcb14792f
https://doi.org/10.1016/0167-1987(94)90082-5
https://doi.org/10.1016/0167-1987(94)90082-5
Autor:
J. L. Jordahl, N. C. Wollenhaupt, D. C. Erbach, E. C. Berry, Neal S. Eash, J.B. Swan, D. L. Karlen
Publikováno v:
Soil and Tillage Research. 31:149-167
Numerous biological, chemical, and physical indicators of soil quality have been suggested, but few have been evaluated using data from long-term field studies. Our objective was to evaluate several proposed soil quality indicators to determine effec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4b62d8660d514658d43b5fb6ee3502a
https://doi.org/10.1016/0167-1987(94)90077-9
https://doi.org/10.1016/0167-1987(94)90077-9
Publikováno v:
Soil and Tillage Research. 25:17-33
The effect of no-tillage (NT), ridge tillage imposed on long-term NT (NT/RT), moldboard plow (MBD), and chisel tillage (CHT) treatments on soil water retention and movement on three soils was studied using field and laboratory measurements. Field mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf1f7bb464658c235375f1f84464b847
https://doi.org/10.1016/0167-1987(92)90059-k
https://doi.org/10.1016/0167-1987(92)90059-k
Publikováno v:
Agricultural Water Management. 7:89-114
Water related climatic factors and soil physical and chemical properties exert a dominant effect on crop production in semiarid regions. Soil management practices which beneficially affect crop production by increasing water storage or through more e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37470c10c33ef152a2e90c7f0324fbb1
https://doi.org/10.1016/0378-3774(83)90077-x
https://doi.org/10.1016/0378-3774(83)90077-x
Publikováno v:
International Journal of Mass Spectrometry and Ion Physics. 28:153-157
Discrete features of the proton spectrum arising from the collisional dissociation of 1-keV HeH+ ions in helium are matched by a simulated spectrum. The dissociation energies so found are in good agreement with the theoretical values of certain assig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1d441d3730e54bebb0514c5733ec431
https://doi.org/10.1016/0020-7381(78)80122-3
https://doi.org/10.1016/0020-7381(78)80122-3
Publikováno v:
Physical Review. 88:831-835
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0084d8e1ba60ec7178ab01af0322c54
https://doi.org/10.1103/physrev.88.831
https://doi.org/10.1103/physrev.88.831
Autor:
J.B. Swan B.V.Sc.
Publikováno v:
New Zealand Veterinary Journal. 1:25-27
Extract Evidence that feeding massive doses, of calciferol prior to calving may be a useful method of preventing milk fever was obtained by Hibbs and co-workers (1950, 1951) at Ohio State University. The treatment causes a rise in serum calcium and i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61c4e61af774eaaaa2f3406c13affe07
https://doi.org/10.1080/00480169.1952.33095
https://doi.org/10.1080/00480169.1952.33095