Zobrazeno 1 - 3
of 3
pro vyhledávání: '"J. G. Graveel"'
Autor:
S. A. Barker, J. G. Graveel
Publikováno v:
Journal of Natural Resources and Life Sciences Education. 33:131-133
In the fall of 1993, the administrators of the Natural Resources and Environmental Science (NRES) Program at Purdue University mailed a survey to available alumni of the program for whom an address was available (386 surveys). In 2003, a similar surv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d60f0b9253b257fb7aa01b0d5037eb67
https://doi.org/10.2134/jnrlse.2004.0131
https://doi.org/10.2134/jnrlse.2004.0131
Publikováno v:
Weed Technology. 4:913-917
A tractor mounted sampler was constructed which allows large soil columns to be obtained rapidly and with miiinal physical effort. The machine utilizes the hydraulic system of a tractor to push a steel sampling cylinder contaniing 30.5-cm i.d. polyvi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::229d56404c7efc51e31403c3726382a2
https://doi.org/10.1017/s0890037x0002666x
https://doi.org/10.1017/s0890037x0002666x
Autor:
J. G. Graveel, J. C. Habel
Publikováno v:
Journal of Agronomic Education. 17:96-98
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb093c9537b4aa96e16eefb6f66443bf
https://doi.org/10.2134/jae1988.0096
https://doi.org/10.2134/jae1988.0096