TAILIEUCHUNG - Soil microbial population as influenced by direct and residual effect of organic and inorganic sources of nutrients in cowpea- little millet cropping sequence

Field experiments were conducted during 2017-18 and 2018-19 in sandy loam soils of Tirupati (AP) to evaluate the direct and residual effect of organic and inorganic sources of nutrients on soil microbial population and yield of cowpea-little millet cropping sequence. Three levels of organic manures (no organic manure, FYM @ 5 tonnes ha-1 and poultry manure @ 2 tonnes ha-1 ) and 3 phosphorus levels (0, 40 and 60 kg P2O5 ha-1 ) applied to preceding cowpea and 3 graded levels of nitrogen viz., 0, 10 and 20 kg ha-1 applied to succeeding rabi little millet. Soil microbial population and yield of kharif, cowpea varied with manures and phosphorus levels. Poultry manure @ 2 tonnes ha-1 recorded higher soil microbial population and pod yield which was on par with application of FYM @ 5 tonnes ha-1 . Among the phosphorus levels, application of 60 kg P2O5 ha-1 resulted higher soil microbial population and pod yield of cowpea. Soil microbial population and grain yield of little millet was influenced by the residual effect of organic manures and phosphorus applied to preceding cowpea, as well as direct nitrogen levels applied succeeding little millet, where 20 kg N ha-1 resulted higher values of microbial population and yield compared to 10 kg N ha-1 and control. This study concluded that the application of poultry manure @ 2 t ha-1 and 60 kg P2O5 ha-1 to preceding cowpea and 20 kg N ha-1 to succeeding little millet increased the soil microbial population and yield in main and residual cropping compared to respective control. | Soil microbial population as influenced by direct and residual effect of organic and inorganic sources of nutrients in cowpea- little millet cropping sequence

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• Soil microbial population
• Organic manures
• Residual effect
• Direct effect
• Little millet
• Soil enzymatic activity
• Finger millet
• Methods of establishment
• Nutrient sources
• Brewery wastewater
• Soil properties
• Microbial population
• Brewery wastewater irrigation
• Microbial population as influenced
• Soil available nutrients
• Acid lime
• Organic mulching
• Inorganic mulching
• Citrus aurantifolia Swingle
• Humic acid
• Enzymatic activity
• Humic acid on soil microbial population
• Minimum tillage
• Rice equivalent yield
• Soybean under maize
• Wheat cropping system
• Organic tomato
• Weed management
• Weed compost
• Fungi and phorate
• Soil applied granular insecticides
• Sugarcane grown soil
• Application of insecticides
• Significantly higher
• Rasomati forest of Pundibari Range
• Cooch Behar
• Slightly acid
• Cement dust
• Soil microbial properties
• Cement dust deposition
• Minimum population
• Observed in case of fungal population
• Soil biomass carbon
• Eleusine coracana L
• Dry DSR
• Enzyme activity
• Grain yield
• Dry direct seeded rice
• Soil microbes
• Acacia mearnsii
• Shola forest
• Acacia mearnsii invasion
• Soil organic carbon stock
• Soil organic carbon
• Microbial population dynamics
• Bamboo species in mollisols
• Ecological benefits
• Irrigated agriculture
• Soil depth
• Nitrogenase activity
• Nitrogen fixing bacteria
• Leaf and fruit nutrients
• Aonla (Emblica officinalis Gaertn
• Integrated nutrient management strategies
• Nutrient status
• Nutrient uptake
• Pole bean (Phaseolus vulgaris L )
• Soil fertility status
• Nutrient management practices
• Rock phosphate
• Preceding crops
• Organic condition
• Phosphorus management
• PSB on soil chemical properties
• Microbial population changes
• Irrigated maize
• Varying levels of phosphorus
• Varied levels of phosphorus
• Bio fertilizers
• Organic amendments
• Soil microbial population of pummelo seedlings
• Nursery condition
• Soil microbial biomass
• Acidic phosphatase
• Alkaline phosphatase and urease
• Soil enzymes
• Bt cotton cultivated soils
• Land use systems
• Soil amendments
• Physico chemical properties
• Beneficial properties of Rhizospheric soil
• Farmyard manures
• Amaranthus blitum
• Organic manures and biofertilizers
• Direct seeded rice
• Fungus and Indian mustard
• Soil after cultivation
• Direct seeded autumn rice
• Slow release nitrogenous fertilizers
• Dehydrogenase activity
• Bacterial population
• Laboratory condition