geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Fall vs. spring plowing and soil physical conditions in a rotation experiment


, : Fall vs. spring plowing and soil physical conditions in a rotation experiment. Agron Jour 45(6): 257-261

In a corn-oats rotation initiated in 1940 on a dark brown prairie soil in Iowa, fall plowing, as compared with spring plowing, brought highly significant yield increases (16%) in corn in one yr. only, 1951. In the preceding yrs. the increases were in favor of fall plowing every yr., but not at statistical levels of significance. Sweet clover planted as a catch crop with the oats increased corn yields highly significantly. Return of the oat straw, rather than removing it, did not increase yields but did increase the air permeability of the soil highly significantly. Of several physical measurements used to evaluate physical conditions of the soil, air permeability, as measured on undisturbed air-dried soil clods, appeared to be the most sensitive. The only controlled yield data on the question of fall plowing versus spring plowing, other than data presented here, appear to be data from Germany of 1883-1886. The German data are in favor of fall plowing.

US$29.90


Other references

Albrechtsen O.; Bartlett C.L.R.; Bettelheim K.A.; Bornstein N.; Colbourne J.S.; Fleurette J.; Fraser D.W.; Joly J.R.; Kallings I.; E.A., 1990: Epidemiology prevention and control of legionellosis memorandum from a who meeting geneva switzerland november 27 29 1989. Bulletin of the World Health Organization 68(2): 155-164

Koschwanez, H.E.; Yap, F.Y.; Klitzman, B.; Reichert, W.M., 2008: In vitro and in vivo characterization of porous poly-L-lactic acid coatings for subcutaneously implanted glucose sensors. The purpose of this study was to test the hypothesis that porous poly-L-lactic acid (PLLA) sensor coatings reduce fibrosis and promote blood microvessel formation in tissue adjacent to the sensor surface. Porous PLLA coatings were produced using a...

L.G.uta, N.; Turner, S.J., 2010: Forewarned is forearmed. Memory killer T cells contribute to control of secondary viral infection by exhibiting rapid effector function upon reinfection. In this issue of Immunity, Kohlmeier et al. (2010) demonstrate that type I interferon is key for rapid upregulation of...

Mcgonigle, G.; Grier, D.; Thompson, A., 2003: Regulation of HOXA5 and HOXA9 by IL-3 in 32D cells. British Journal of Haematology 121(Supplement 1): 51, May

Anon, 1982: National cancer institute sponsored study of classifications of non hodgkins lymphomas summary and description of a working formulation for clinical usage. This international multi-institutional clinicopathologic study of 1175 [human] cases of non-Hodgkin's lymphoma examined histologic slides and clinical records from previously untreated patients seen between July 1971 and Dec. 1975 at 4 instit...

Popple, A.V.; Sagi, D., 2000: A Fraser illusion without local cues?. In the well-known Fraser illusion, a line composed of tilted elements itself appears tilted. The standard explanation of this illusion has been that the global orientation of the line is in some way influenced by the local orientation of the eleme...

Verheijen P.J.T.; Ademiluyi R.A.; Ajakaiye D.E., 1982: Geophysical exploration of the Ririwai tin lode in a tropical terrain; a case history. Geosciences in International Development Report 7: 136-141

Haley, D.W.; Stansbury, K., 2003: Infant stress and parent responsiveness: regulation of physiology and behavior during still-face and reunion. This study examined infant response and recovery from a social challenge and parent responses. Behavioral and physiological responses were measured from forty-three 5- and 6-month-olds infants during a modified still-face procedure that used an ad...

Lein, K.A., 1973: The quantitative estimation of the glucosinolate content in Brassica seeds. 2. Photometric determination of the total glucosinolate, the thio-oxazolidone and isothiocyanate contents in a single test. A new enzymatic method for determining the content of total glucosinolates, thio-oxazolidones and isothiocyanates in extracts from single seeds of rape without defatting the seeds before analysis, is described. It was recommended that the method s...

Ngueyem, T.A.; Brusotti, G.; Marrubini, G.; Grisoli, P.; Dacarro, C.; Vidari, G.; Finzi, P.Vita.; Caccialanza, G., 2008: Validation of use of a traditional remedy from Bridelia grandis (Pierre ex Hutch) stem bark against oral Streptococci. Bridelia grandis (Pierre ex Hutch) (Euphorbiaceae) is a medicinal plant traditionally used in Cameroon by pygmies Baka as a remedy for oral cavity affection. Bioassay-guided stem bark extracts were investigated for their in vitro antimicrobial pro...