EVALUATION OF STCR TARGETED YIELD APPROACH ON RAGI CROP YIELD, SOIL PROPERTIES, NUTRIENT UPTAKE AND NUTRIENT USE EFFICIENCY
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Date
2007-09-17
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University of Agricultural Sciences GKVK, Banglore
Abstract
A field experiment was conducted on Alfisols during 2006-2007 of Zonal
Agricultural Research Station, GKVK, UAS, Bangalore to evaluate the different methods
of nutrient application in comparison with the STCR approach on ragi crop (GPU-28),
yield, soil properties, nutrient uptake and nutrient use efficiency.
The result revealed that application of N,P,K nutrients for a soil test crop
response (STCR) targeted yield of 50 q ha"' through 50 % inorganic + 50 % organics
recorded a highest gr^in yield of (3638.9 kg ha"') and straw yield of (5740.6 kg ha"').
Similarly application of N,P,K nutrients through 50 % inorganic + 50 % organics
for a targeted yield of 60 q ha"' recorded highest N, K, S, Ca, Mg content in the soil.
However, available P status was highest where STCR target of 50 q ha"' was fixed by
application of 50 % inorganic+ 50% organics sources of nutrients.
Higher values of N, P, Ca, S uptake by ragi grains and straw was noticed with 50
% inorganic + 50 % organic sources of nutrient application for a targeted yield of 50qha"'
except Mg K, uptake by ragi grains and straw which has recorded higher values due to
application of N, P, K nutrient through 50% inorganic 50% organic sources of nutrients
for a targeted yield of 60 q ha"'.
, However, the NUE was highest where nutrients were applied as per POP
followed by nutrienti applied for a targeted yield of 50 q ha "' through conjunctive use
of Organic and inorganic sources of nutrients. This higher NUE by ragi crop as per
package clearly indicates that nutrients were applied in a well balanced manner but still
STCR approach was better for achieving the higher yields
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