Zobrazeno 1 - 10
of 308
pro vyhledávání: '"J. H. Conrad"'
Autor:
James R. Simpson, J. H. Conrad
Publikováno v:
Agricultural Systems. 44:143-161
The widespread belief that domestic animals—and cattle in particular—are a major cause of forest and land degradation in Central America is analyzed in a systems context emphasizing economic and demographic considerations. It is concluded that la
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::766b37de90717fc51357cffbeaf186d6
https://doi.org/10.1016/0308-521x(94)90158-c
https://doi.org/10.1016/0308-521x(94)90158-c
Autor:
J. H. Conrad, J.R. Simpson
Publikováno v:
Journal of Dairy Science. 76:1744-1752
The role of cattle in Central America, particularly dual purpose cattle, is considered in the context of economic and social problems. Rapid urbanization and slow rural growth lead to a need for reevaluation of the extent to which commercial dairy op
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::43232488d17148ff7231929cd1f14019
https://doi.org/10.3168/jds.s0022-0302(93)77507-4
https://doi.org/10.3168/jds.s0022-0302(93)77507-4
Publikováno v:
Small Ruminant Research. 5:217-222
The influence of injectable selenium on the productivity of grazing Criollo × Corriedale and Criollo × Romney crossbred ewes in a region of the Paramo of Colombia was studied. 24 ewes were injected with 0.1 mg sodium selenite per kg 1 month before
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bf13d8cad7348d34d980a1479ac0702e
https://doi.org/10.1016/0921-4488(91)90126-b
https://doi.org/10.1016/0921-4488(91)90126-b
Publikováno v:
Small Ruminant Research. 5:9-21
The macromineral status of pregnant-lactating ewes, lambs, and yearlings on three farms in the Paramo region of the Cordillera Oriental in Colombia was studied. Soil, forage, blood and rib bones were sampled during the end of the rainy season (May–
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5f28ecde1883f1372c493f7bf8746c7
https://doi.org/10.1016/0921-4488(91)90026-m
https://doi.org/10.1016/0921-4488(91)90026-m
Publikováno v:
Communications in Soil Science and Plant Analysis. 22:1123-1136
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88e1901fd3aa5c85d7be24de914a0480
https://doi.org/10.1080/00103629109368479
https://doi.org/10.1080/00103629109368479
Publikováno v:
Communications in Soil Science and Plant Analysis. 22:1137-1149
A two‐year study was conducted to determine the trace mineral status of cattle grazing forages (bahiagrass) and soils on a ranch in central Florida. Forage and soil samples were collected every month for two years. Month effect (P 0.05) in forage t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::855dd6e16b455ca35c2ab6f99e0a3fc9
https://doi.org/10.1080/00103629109368480
https://doi.org/10.1080/00103629109368480
Publikováno v:
Small Ruminant Research. 5:23-34
Three sheep classes (pregnant-lactating ewes, lambs and yearlings) were studied to determine the trace mineral status of grazing animals from three sheep farms located in the Paramo region of the Cordillera Oriental in Colombia. At the end of the rai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0661b8e60680d4d84d540d825f33cd80
https://doi.org/10.1016/0921-4488(91)90027-n
https://doi.org/10.1016/0921-4488(91)90027-n
Publikováno v:
Asian-Australasian Journal of Animal Sciences. 4:111-120
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34dc2176948df932c96aaa7da7d60b9e
https://doi.org/10.5713/ajas.1991.111
https://doi.org/10.5713/ajas.1991.111
Publikováno v:
Asian-Australasian Journal of Animal Sciences. 4:121-130
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9542bbbcac941dd4be81a3fde7cf073a
https://doi.org/10.5713/ajas.1991.121
https://doi.org/10.5713/ajas.1991.121
Publikováno v:
Communications in Soil Science and Plant Analysis. 21:2345-2360
A study was conducted to determine the elemental composition of two plant fractions (leaves and stems) of several forage species in three sheep farms of the paramo in Colombia. The elemental composition of the forage species, and the relationship bet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd56b5907ea8d28d511f6df7ceb92ace
https://doi.org/10.1080/00103629009368385
https://doi.org/10.1080/00103629009368385