Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Bull, Len"'
Publikováno v:
Review of Agricultural Economics, 1995 May 01. 17(2), 159-169.
Externí odkaz:
https://www.jstor.org/stable/1349729
Autor:
Bull, Len, Sandretto, Carmen
Conservation tillage was used on more than 99 million acres in 1994, about 35 percent of U.S. planted crop area. Five years earlier, the total conservation-tilled acreage was 72 million. Besides conserving soil, crop residue management practices also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od_______645::a1263118ae3186195e1245d00da14e42
http://purl.umn.edu/154900
http://purl.umn.edu/154900
Pesticides used on major crops more than doubled during 1964-82 (from 233 to 612 million pounds of active ingredients). Nitrogen, phosphate, and potash use for all purposes (agriculture and nonagriculture) rose from 7.5 million pounds in 1960 to a re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1375d3937e12d34f0dc42730a7ae3e2a
Autor:
Bull, Len
This report documents a method used to define the tillage system used in crop production, based on the percentage of soil surface covered by residue from the previous crop immediately after planting a new crop. Residue estimates were developed for th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe3f0040b5626937703996eedbe7df18
Autor:
Bull, Len
Publikováno v:
Northern Woodlands Magazine; Winter2010, Vol. 17 Issue 4, p10-11, 2p