Rainfed rice - IRRI books - International Rice Research Institute

Comparative analysis of different practices of nutrient management in rainfed rice, cont.
Particulars Fertilisers Farmyard Green manure Crop residues Other organic Legumes in Biofertilisers Industrial Slow-release
manure
materials
rotation
waste
N fertiliser
Effect on soil Continuous Continuous
application
application
deteriorates
Increases water-holding capacity and organic matter content and reduces bulk density
adversely
physical and Reduces pH of salt-affected soil, increases nutrient availability in balanced form affects physical
and chemical and chemical
properties properties of
of soil soil
Favourable effect Adverse effect
Effect of soil Adverse effect
microbes
Continuous
application of
fertilisers
results in yield
Sustains yield
Sustainability Continuous
application of
fertilisers results
in yield decline
after a few years
decline after
a few years
Heavy doses
of fertiliser
Heavy doses of
Atmospheric
fertilisers result
pollution
result in
release of
gases which
in release of
gases which
No effect
pollute the
atmosphere and
pollute the
atmosphere
their leaching
creates
groundwater
pollution
N : nitrogen; P : phosphorus; K : potassium; NA : not applicable