Role of tractors, tubewells and plant breeding in increasing cropping intensity in Pakistan's Punjab
| Year of publication: |
1990
|
|---|---|
| Authors: | Tetlay, Khaleel ; Byerlee, Derek ; Ahmad, Zulfiqar |
| Published in: |
Agricultural Economics. - Blackwell, ISSN 0169-5150. - Vol. 4.1990, 1, p. 13-25
|
| Publisher: |
Blackwell |