Yazar
sam h johnson
4 cilt bulundu.
Cilt sonuçları
Management reform and performance changes in two irrigation districts in the north China plain
Sam H. Johnson · International Irrigation Management Institute
34 sayfa · 1996
Irrigation / Management
Can farmers afford to use the irrigation wells after turnover?
Sam H. Johnson · Program on Local Management, International Irrigation Management Institute
21 sayfa · 1993
Irrigation pumps / Irrigation / Management
Costs and returns for selected crops in Closed Basin, San Luis Valley, Colorado, 1974
Sam H. Johnson · Cooperative Extension Service, Colorado State University
49 sayfa · 1975
Economic aspects / Economic aspects of Irrigation farming / Irrigation farming / San Luis Valley Project / Statistics