physicochemical

STUDIES ON EFFECT OF ORGANIC AGRICULTURAL INPUTS ON SOIL NUTRIENT
maximum of 165.91 P at 30 DAS. The P values
reported were in high range of >560 kg ha -1 (Prasad
Rao and Bhupal Raj, 2001). To make P, more
available, phosphate solubilising and P mobilizing
strains are generally recommended. The concepts
are not well picked up because of lack of shelf life of
such formulations. Hence, Bio-PhosG has been a
choice fertilizer.
The availability of soil potash was influenced
with the organic inputs used. Bio-Phos alone or in
combination with Bio-PotashG +Bio-ZincG resulted
in higher K in soil and plant. The highest available
potassium (531.13 kg ha -1 ) was recorded by the
treatment where N, P, K and ZnSO 4
were applied
through inorganic fertilizers followed by the treatment
where P was substituted by Bio-PhosG 523.01 kg
ha -1 . Lowest K content was recorded control (336.81kg
ha -1 ). K content in soil increased from 30 to 45 DAS
(379.53 to 553.43 kg ha -1 ) and later on decreased
from 45 to 60 DAS (553.43 to 508.00 kg ha -1 ).
Interaction effect revealed a maximum soil K of
576.50 kg ha -1 at 30 DAS. The K values reported in
soil were in high range of >288 kg ha -1 (Prasad Rao
and Bhupal Raj, 2001). In other studies, use of peanut
cake registered maximum organic C, Bray-P and
exchangeable K (Rutherford and Juma, 1992).
The highest available zinc (9.40 ppm) was
recorded with addition of inorganic N, P and K
fertilizers followed by the treatment where inorganic
Zinc sulphate @ 5 kg ha -1 was supplemented (6.31
ppm). Lowest value was recorded in control (1.78
ppm). P-Zn interaction and their antagonism are well
known in soil and plant systems. The products of
Prathista namely Bio -Potash and Bio-Zinc contain
glucose as carrier material which helps the crops to
absorb potash and zinc and also simultaneously
improve soil microflora due to its organic nature. Soil
preconditioned with glucose humic acid and cellulose
has been reported to shift the microbial ecophysiology
community structure, biomass, substrate
induced respiration and ATP content. (Dilly et al.,
2004). Interaction effect recorded a maximum soil
Zn of 17.49 ppm at 30 DAS.
Agri inputs influenced plant parameters equally
as soil. Significant variation in SPAD chlorophyll
content of leaves was observed among different
treatments. Addition of fertilizers either inorganic or
organic increased the SPAD value. Among the
treatments where N,P,K and Zn were supplied through
inorganics recorded the highest SPAD value (41.14)
and was on par (40.24) with treatment where P and
Zn were applied through organic source (table 2). The
chlorophyll content increased from 30 to 45 DAS
(36.27 to 44.2) and there after decreased. The
decrease in SPAD units was correlated with the
decrease in leaf area noticed at 60 DAS. The
maximum chlorophyll values coincided with the
maximum leaf area present in the plants. Maximum
SPAD values of 47.01 TO 47.05 with fertilizer
application as inorganics or substituted as BiophosG
+ BiopotashG.
The effective of root nodules number increased
from 30 to 45 DAS. The mean increase was from
5.25 to 8.12. The highest number of effective nodules
(12.0) was recorded in the treatment where P, K and
Zn were substituted by organic sources (table 2) and
was followed by the treatment where Zn was
substituted by Bio-ZincG (9.03) and N, P, K were
supplied through fertilizers.
Significant variation was noticed because of
treatments on yield attributing characters and seed
yield. The mean pod number varied from 3.66 to 10.23.
Treatment with phosphorous application as Bio-
PhosG, recorded the maximum pods. Similar to pod
number, mean seed number per pod varied
significantly among different treatments. Treatment
which included P and K application through
Bio-PhosG and Bio-PotashG recorded highest
number of seeds per pod (10.64). The highest 100
seed weight (4.76 g) was recorded by the treatments
where P and K were supplied through Bio-PhosG and
Bio-PotashG . Mean maximum pod length (7.40 cm)
was recorded where P, K and Zn were applied through
organic inputs. The mean seed yield per pot varied
significantly among different treatments. The highest
seed yield (1425.6 kg ha -1 ) was recorded by the
treatment as with 100 seed weight in treatments
where P and K were supplied through Bio-PhosG and
Bio-Potash G (table 2).
Multiple linear regression (MLR) equation was
fitted for seed yield on the nutrient uptake at 30, 45
and 60 DAS. The coefficient of regression equation
and the corresponding t values, Multiple Coefficient
Correlation (R) and r 2 values are presented in Table
65