physicochemical

MALLA REDDY et. al.
Table 3. Yield and Economics of rice as influenced by zinc nutrition
Treatments
Grain yield
(kg/ha)
Straw yield
(kg/ha)
Net returns
(Rs./ha)
2008 2009 2008 2009 2008 2009
T 1 : Control 5889 5429 8000 7029 39,179 45,348
T 2 : 50 kg ZnS0 4 /ha as basal
application
T 3 : 50 kg ZnS0 4 /ha as basal
application + foliar spray @
3g/l at 30 DAT
T 4 : 50 kg Biozinc/ha as basal
application
T 5 : 50 kg Biozinc/ha as basal
application + foliar spray @
3 g/l at 30 DAT
T 6: Foliar spray of ZnS0 4 @ 3
g/l at 30 and 45 DAT
T 7 : Foliar spray of Biozinc @
3 g/l at 30 and 45 DAT
6725 6601 9150 8185 46,470 57,830
7003 6696 9753 8281 49,584 58,925
6986 6943 8940 8530 47,961 61,240
7312 7042 9260 8621 51,212 62,344
6295 6202 9820 7794 44,641 54,515
6481 6113 9060 7682 45,550 53,359
SE+ 155 129 755 259 - -
CD at 5% 336 282 NS 565 - -
Cost (Rs./kg): Zn So 4
: 31 ,Biozinc: 45
Cost of cultivation (Rs./ha): T 1
: 23,000; T 2
: 24,550, T 3
: 24,597; T 4
: 25,250: T 5
: 25,318; T 6
: 23,093 T 7
:23,135
Price (Rs./kg): Grain :9.2 (2008), 10.0 (2009); Straw (Rs./kg): 1.0 (2008), 2.0 (2009)
Table 4. Influence of Zn nutrition on DTPA-Zn content in soil after harvest of rice
Treatments
DTPA-Zn in the post
harvest soil (ppm)
2008 2009
T 1 : Control 0.7 0.6
T 2 : 50 kg ZnS0 4 /ha as basal application 0.8 1.0
T 3 : 50 kg ZnS0 4 /ha as basal application
+ foliar spray @ 3g/l at 30 DAT
0.8 1.0
T 4 : 50 kg Biozinc/ha as basal application 0.9 1.1
T 5 : 50 kg Biozinc/ha as basal application
+ foliar spray @ 3 g/l at 30 DAT
T 6: Foliar spray of ZnS0 4 @ 3 g/l at 30
and 45 DAT
T 7 : Foliar spray of Biozinc @ 3 g/l at 30
and 45 DAT
Initial value
1.0 1.1
0.7 0.8
0.7 0.8
0.7 ppm
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