Optimizing the external energy input into farmland ecosystems: a case study from Ningxia, China
| Year of publication: |
1997
|
|---|---|
| Authors: | Ma, Z. Y. ; Edwards-Jones, G. |
| Published in: |
Agricultural Systems. - Elsevier, ISSN 0308-521X. - Vol. 53.1997, 2-3, p. 269-283
|
| Publisher: |
Elsevier |