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中图分类法(4)
马克思主义、列宁主义、毛泽东思想、邓小平理论(4)
在“
自然资源管理
”中,
命中:
4
条,耗时:小于0.01 秒
1.
Integrating sheep grazing into wheat-fallow
systems
: Crop yield
and
soil properties
作者:
And
rew W. Lenssena
;
alenssen@iastate.edu
;
Upendra M. Sainjub
;
Patrick G. Hatfieldc
关键词:
Cropping
systems
;
Semiarid
;
Northern Great Plains
;
Tilled summer fallow
;
Chemical fallow
;
Grazed summer fallow
;
Spring wheat
;
Winter wheat
;
Sheep
;
Integrated
livestock
and
grain
farming
systems
刊名:Field Crops Research
年:2013
2.
Assessing the potential of dual-purpose maize in southern Africa: A multi-level approach
作者:
Sabine Homann-Kee Tui
;
Michael Bl眉mmel
;
Diego Valbuena
;
Albert Chirima
;
Patricia Masikati
;
And
re F. van Rooyen
;
Girma T. Kassie
关键词:
Feed resources
;
Maize cultivars
;
Crop-
livestock
systems
;
GIS
;
Southern Africa
刊名:Field Crops Research
年:September, 2013
3.
Application of a simulation model for assessing integration of smallholder shifting cultivation
and
sheep production in Yucatán, Mexico
作者:
David Parsons
;
Charles F. Nicholson
;
Robert W. Blake
;
Quirine M. Ketterings
;
Luis Ramí
;
rez-Aviles
;
Jerome H. Cherney
;
Danny G. Fox
关键词:
Crop–
;
livestock
interactions
;
Crop–
;
livestock
systems
;
Milpa
;
Sheep
;
Shifting cultivation
;
System dynamics
刊名:Agricultural
Systems
年:2011
4.
An
Integrated
Index of Electrical Energy Use in Canadian Agriculture with Implications for Greenhouse Gas Emissions
作者:
J.A. Dyer
and
R.L. Desjardins
刊名:Bio
systems
Engineering
年:2006
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