Soil microbial population and soil nutrient status are important criteria for improving the yields. So this study is conducted with an objective to know the impact of organic and inorganic sources of nitrogen on yield, soil microbial load and nutrient status of the soil in pearl millet. A field experiment was conducted during kharif, 2019 at Agricultural College Farm, Bapatla on sandy soils with eight treatments consisting combined organic and inorganic nitrogen sources. The highest grain yield (2955 kg ha-1), straw (5867 kg ha-1) yield and soil nitrogen status (164.10 kg ha -1) were recorded with 75% Soil Test Based Nitrogen (STBN) + 25% vermicompost + Azospirillum @ 5 kg ha-1 and was followed by statistically similar treatment 100% STBN + Azospirillum @ 5 kg ha-1. Significantly higher microbial load (Bacteria, Fungi and Actinomycetes), P and K status in soil recorded with the treatments where 50% of STBN applied through FYM (50% STBN + 50% FYM + Azospirillum @ 5 kg ha-1), whereas lowest was recorded with chemical fertilizer alone. The combined sources of nitrogen both organic and inorganic fertilizers would be able to improve soil fertility and soil microbial load and finally improve the yields.
A field experiment was conducted at the Agricultural College Farm, Bapatla, Andra Pradesh during kharif 2012 to study the effect of organic sources of nutrients viz., poultry manure, FYM, neemcake, vermicompost and recommended NPK fertilisers on growth, yield attributes and yield of rice. Application of recommended dose of fertilizer (120:60:40 kg N, P2O5 , K2O ha-1 ) was found to be superior in giving maximum growth, yield attributes and yield of rice, which was on a par with 50% RDN as basal+50% at 10 days before PI stage through poultry manure.
The essence of global water scarcity is the geographic and temporal mismatch between fresh water demand and availability. The increasing world population, improving living standards, changing consumption patterns, and expansion of irrigated agriculture are the main driving forces for the rising global demand for water. Climate change, such as altered weather-patterns (including droughts or floods), deforestation, increased pollution, green house gases, and wasteful use of water can cause insufficient supply. At the global level and on an annual basis, enough freshwater is available to meet such demand, but spatial and temporal variations of water demand and availability are large, leading to (physical) water scarcity in several parts of the world during specific times of the year. Through these reasons there is a need to go for alternative measures to mitigate the water scarcity. Desalination may be the best alternative measure for drinking, irrigation and domestic purposes of the people. Desalination is the cheapest available technology and cost of production of one litre drinking water is varies between ₹ 0.04 to 0.15 compared to reservoir i.e. ₹ 2 to 2.75 for project efficiency of about 50years.
A field experiment was conducted at the Agricultural College Farm, Bapatla during kharif 2012 to study the effect of organic sources of nutrients (poultry manure, FYM, neemcake and vermicompost) and recommended NPK fertilisers on drymatter accumulation and nutrient uptake of rice. The results of the investigation showed that higher drymatter accumulation N, P and K uptake were recorded with 100 % RDN through chemical fertilisers which was significantly followed by 100% RDN through poultry manure. At 90 DAT and at maturity, significantly higher drymatter accumulation, yield and nutrient uptake were observed with fertiliser treated plots, which was on a par with 50% RDN as basal+ 50% at 10 days before PI stage through poultry manure and it is on a par with 100% RDN through poultry manure and significantly superior to all other treatments.
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