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fertilizers
It is impossible to know who the first farmer to grow organic potatoes was. While more farmers grow inorganically now, before the development of synthetic fertilizers and pesticides, all farmers grew organically.
Irrigation.
the affect of fertilizers on the resources is that our farmers use fertilizers in order to maintain the fertility of soil except organic fertilizers
Ground manure
M. H. S. Dayaratne has written: 'A review of alternative strategies for improving farmer-managed irrigation systems in Sri Lanka' -- subject(s): Citizen participation, Farmers, Irrigation, Management
This is called irrigation - specifically it is "surface irrigation".
Farmers need to use irrigation because there's little precipitation in the Interior Plains.
Ammonia
Farmers, gardeners and persons making improvised explosives. BTW: it is spelled 'fertilizers.'
Irrigation
Irrigation