Papers by Karuppusamy Rajan
International Journal of Current Microbiology and Applied Sciences, 2017
A field experiment was conducted to investigate the soil microbial growth and enzymatic activity ... more A field experiment was conducted to investigate the soil microbial growth and enzymatic activity of Treated Distillery Effluent (TDE) and Bio-compost (BC) applied in sandy loam soils grown with Maize crop (Zea mays). Under split plot design with five main plots with addition of organics viz., No organics; application of TDE @ 0.5 lakh litres ha-1 ; TDE @ 1.0 lakh litres ha-1 ; Bio compost @ 5 t ha-1 and FYM @ 12.5 t ha-1 + biofertilizers. In addition, five subplot treatments viz., addition of inorganic fertilizers at different levels of recommended dose of NP fertilizers (0 %, 50 %, 75 % and 100 %) compared with 100 per cent recommended dose of NPK @ 150 :75: 75 of kg N, P 2 O 5 and K 2 O ha-1. Application of TDE 1.0 lakh litres ha-1 resulted higher bacterial, fungal and actinomycetes population over control at all stages of crop growth. Indeed, the soil bacterial population recorded the highest value of 20.1 and 19.3 x10 6 CFU g-1 of soil with the application of TDE @ 1.0 lakh litres ha-1 compared to control at post-harvest stage. There was an increase in the soil fungal population to the tune of 30.3 per cent over control at post-harvest stage. Furthermore, application of TDE @ 1.0 lakh litres ha-1 recorded the highest soil actinomycetes population at all stages of crop growth. The soil enzyme activities as phosphatase, dehydrogenase and urease recorded the highest values of 12.8 μg p-nitrophenol g-1 soil hr-1 ; 2.96 μg TPF g-1 soil hr-1 and 5.16 μg NH 4-N g-1 soil hr-1 respectively with the application of TDE @ 1.0 lakh litres ha-1. The soil microbial population and enzyme activities increased with the application of distillery effluent over control. Hence, it was observed that, Soil microbial activity had a direct impact on the plant nutrient availability as well as other favorable properties associated with soil productivity.
Efficacy of conventional, solid soluble and liquid fertilizers applied through drip-fertigation on tomato
A field study was conducted during rabi seasons at research farm of ICAR Research Complex for Eas... more A field study was conducted during rabi seasons at research farm of ICAR Research Complex for Eastern Region, Patna to examine the effects of sources and rates of fertilizers on the growth, yield, economics and fertilizer use efficiency of tomato under drip-fertigation. Three types of fertilizer sources in combination, i.e., conventional fertilizers (F1), conventional with soluble solid fertilizer (F2) and conventional with liquid fertilizer (F3) were applied at three different rates, viz., 50% (D1) 75% (D2) and 100% (D3) of recommended doses. The study revealed that root growth parameters were positively influenced by the application of liquid fertilizers. Treatment F3 showed the highest root growth followed by F2. Fertigation with CF + liquid fertilizers (F3) gave the maximum fruit yield of 55.7 t ha−1. Highest B: C ratio of 1.96 was recorded in fertigation with conventional fertilizers (F1). Different fertilizer doses were not significant. However, 50% dose (D1) recorded the highest fertilizer use efficiency (3.7 q/kg of NPK).
Faba bean (Vicia faba L.) Carbon sequestration and its role in soil quality
Faba bean soils and there management for higher productivity
Effect of nursery raising techniques of Boro rice on plant growth and soil physical properties
Four nursery raising techniques namely in open condition, with farm yard manure (FYM) and without... more Four nursery raising techniques namely in open condition, with farm yard manure (FYM) and without FYM, raising nursery in poly house with FYM and without FYM were employed to select optimum nursery growing environment under field condition and its effect on soil physical properties and plant growth was studied. Difference in soil temperature was 4.6°C between poly house and open condition at 5 cm depth irrespective of FYM application. Organic carbon content and water retention were found higher in FYM applied soils. Growth parameters of seedlings were found highly significant under poly house compared to open condition. Number of seedlings survived in nursery under poly house with FYM was highest. Root weight under poly house was 98 per cent higher than open condition. Higher root diameter was observed in open condition over poly house. Root length density, surface density and volume density were higher under poly house. Root shoot ratio was to be found highest in nursery in polyhouse with FYM which was 83 per cent higher than open condition without FYM. Boro rice seedlings under poly house with FYM recorded the highest number and better crop stand than other treatments. Under open condition, FYM application proved to be superior to nursery (Without FYM).
Enhancing water productivity through micro- irrigation and pond-based efficient agricultural production system
Improving strawberry productivity and quality through drip irrigation and polythene mulch in Bihar
Effects of drip irrigation and polythene mulch on Productivity and quality of straw berry (Fragaria ananassa)
ABSTRACT
Four nursery raising techniques namely in open condition, with farm yard manure (FYM) and without... more Four nursery raising techniques namely in open condition, with farm yard manure (FYM) and without FYM,
raising nursery in poly house with FYM and without FYM were employed to select optimum nursery growing
environment under field condition and its effect on soil physical properties and plant growth was studied.
Difference in soil temperature was 4.60C between poly house and open condition at 5 cm depth irrespective of
FYM application. Organic carbon content and water retention were found higher in FYM applied soils. Growth
parameters of seedlings were found highly significant under poly house compared to open condition. Number of
seedlings survived in nursery under poly house with FYM was highest. Root weight under poly house was 98 per
cent higher than open condition. Higher root diameter was observed in open condition over poly house. Root
length density, surface density and volume density were higher under poly house. Root shoot ratio was to be
found highest in nursery in polyhouse with FYM which was 83 per cent higher than open condition without
FYM. Boro rice seedlings under poly house with FYM recorded the highest number and better crop stand than
other treatments. Under open condition, FYM application proved to be superior to nursery (Without FYM).
A field study was conducted during rabi seasons at research farm of ICAR Research Complex for Eas... more A field study was conducted during rabi seasons at research farm of ICAR Research Complex for Eastern
Region, Patna to examine the effects of sources and rates of fertilizers on the growth, yield, economics and
fertilizer use efficiency of tomato under drip-fertigation. Three types of fertilizer sources in combination, i.e.,
conventional fertilizers (F1), conventional with soluble solid fertilizer (F2) and conventional with liquid fertilizer
(F3) were applied at three different rates, viz., 50% (D1) 75% (D2) and 100% (D3) of recommended doses. The
study revealed that root growth parameters were positively influenced by the application of liquid fertilizers.
Treatment F3 showed the highest root growth followed by F2. Fertigation with CF + liquid fertilizers (F3) gave
the maximum fruit yield of 55.7 t ha-1. Highest B: C ratio of 1.96 was recorded in fertigation with conventional
fertilizers (F1). Different fertilizer doses were not significant. However, 50% dose (D1) recorded the highest
fertilizer use efficiency (3.7 q/ kg of NPK).
Water erosion is the major type of land degradation in Karnataka affecting 30.9% geographical are... more Water erosion is the major type of land degradation in Karnataka affecting 30.9% geographical area in the state in which Kolar is the most severely affected district in Southern Karnataka. Remote sensing technique was used to identify the hot spots. Seven profiles were opened in two transects, one near Jankamakote village (named as JKT with five profiles) and another one at Bhaktarahalli village (named as BHT with two profiles) and investigated the impact of water erosion on soil physical indicators. Pedon 2 of JKT under natural scrub forest recorded highest infiltration rate and Pedon-3 recorded the lowest infiltration rate because the soil was crusted and compacted. Highest bulk density (1.7 Mg m ) was observed in Pedon 4 in JKT. The texture of surface horizons in all the pedons were sandy clay or sandy clay loam. Available soil water in different Pedons varied from 67.4 to 288.4 mm. Pedon-4 of JKT retained only 67.4 mm water because of severe erosion, shallow depth and higher bulk density. Pedon-1 of BHT retained maximum water (132.
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Papers by Karuppusamy Rajan
raising nursery in poly house with FYM and without FYM were employed to select optimum nursery growing
environment under field condition and its effect on soil physical properties and plant growth was studied.
Difference in soil temperature was 4.60C between poly house and open condition at 5 cm depth irrespective of
FYM application. Organic carbon content and water retention were found higher in FYM applied soils. Growth
parameters of seedlings were found highly significant under poly house compared to open condition. Number of
seedlings survived in nursery under poly house with FYM was highest. Root weight under poly house was 98 per
cent higher than open condition. Higher root diameter was observed in open condition over poly house. Root
length density, surface density and volume density were higher under poly house. Root shoot ratio was to be
found highest in nursery in polyhouse with FYM which was 83 per cent higher than open condition without
FYM. Boro rice seedlings under poly house with FYM recorded the highest number and better crop stand than
other treatments. Under open condition, FYM application proved to be superior to nursery (Without FYM).
Region, Patna to examine the effects of sources and rates of fertilizers on the growth, yield, economics and
fertilizer use efficiency of tomato under drip-fertigation. Three types of fertilizer sources in combination, i.e.,
conventional fertilizers (F1), conventional with soluble solid fertilizer (F2) and conventional with liquid fertilizer
(F3) were applied at three different rates, viz., 50% (D1) 75% (D2) and 100% (D3) of recommended doses. The
study revealed that root growth parameters were positively influenced by the application of liquid fertilizers.
Treatment F3 showed the highest root growth followed by F2. Fertigation with CF + liquid fertilizers (F3) gave
the maximum fruit yield of 55.7 t ha-1. Highest B: C ratio of 1.96 was recorded in fertigation with conventional
fertilizers (F1). Different fertilizer doses were not significant. However, 50% dose (D1) recorded the highest
fertilizer use efficiency (3.7 q/ kg of NPK).
raising nursery in poly house with FYM and without FYM were employed to select optimum nursery growing
environment under field condition and its effect on soil physical properties and plant growth was studied.
Difference in soil temperature was 4.60C between poly house and open condition at 5 cm depth irrespective of
FYM application. Organic carbon content and water retention were found higher in FYM applied soils. Growth
parameters of seedlings were found highly significant under poly house compared to open condition. Number of
seedlings survived in nursery under poly house with FYM was highest. Root weight under poly house was 98 per
cent higher than open condition. Higher root diameter was observed in open condition over poly house. Root
length density, surface density and volume density were higher under poly house. Root shoot ratio was to be
found highest in nursery in polyhouse with FYM which was 83 per cent higher than open condition without
FYM. Boro rice seedlings under poly house with FYM recorded the highest number and better crop stand than
other treatments. Under open condition, FYM application proved to be superior to nursery (Without FYM).
Region, Patna to examine the effects of sources and rates of fertilizers on the growth, yield, economics and
fertilizer use efficiency of tomato under drip-fertigation. Three types of fertilizer sources in combination, i.e.,
conventional fertilizers (F1), conventional with soluble solid fertilizer (F2) and conventional with liquid fertilizer
(F3) were applied at three different rates, viz., 50% (D1) 75% (D2) and 100% (D3) of recommended doses. The
study revealed that root growth parameters were positively influenced by the application of liquid fertilizers.
Treatment F3 showed the highest root growth followed by F2. Fertigation with CF + liquid fertilizers (F3) gave
the maximum fruit yield of 55.7 t ha-1. Highest B: C ratio of 1.96 was recorded in fertigation with conventional
fertilizers (F1). Different fertilizer doses were not significant. However, 50% dose (D1) recorded the highest
fertilizer use efficiency (3.7 q/ kg of NPK).