Nitrogen fertilizer on population

Cotton (Gossypium hirsutum L.) is the most important cash crop and there is a demand for simultaneous increase in the productivity of cotton, edible oilseeds and fodders to fulfil the diversified needs of growing population. For this purpose, cotton-based intercropping seems to be a promising strategy. Short duration legume fodders are potential sources of nutrients during summer especially atmospheric nitrogen fixing which are supplement of inorganic fertilizers.

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In the India, three to four cutting are possible, typical yield distribution is 30-35 percent in the first cutting, 35-40 percent in the second cutting and 20-25 percent in subsequent cutting. More consistently high quality forage is obtained by grazing, green chopping and ensiling early spring growth to stimulate recovery growth, fertilize with nitrogen immediately following the initial cutting (Smith et al., 2005).

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To eradicate the malnutrition problem and improve the protein deficient diet and low yield of pea, it is necessary to increase pea production per unit area on sustainable basis to meet the requirement of increasing population of the nation. In view of that, experiment was executed to examine the response of four different organic manures viz. farmyard manure, vermicompost, castor cake and poultry manure as a source of nitrogen with or without chemical fertilizers like phosphorus and potassium and biofertilizer i.e. PSB were tested during the year of 2012 and 2013.

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Effect of Planting Time, Fertility Level and Plant Population on Development, Yield, Nutrient Uptake and Quality of Winter Popco A popcorn (Zea mays everta Sturt.) composite variety, namely V.L. Amber was assessed for their potential role as winter crop in the management at Agricultural Research Farm of BHU, Varanasi, India, under late sown condition of 2009-10 and 2010-11, respectively. The three date of sowing i.e.

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Field experiments was conducted during 2015 on clay loam, sandy loam soil evaluate “to study the Effect of different levels of NPK and Vermicompost on physico-chemical properties of soil” comparison to inorganic fertilizers nitrogen, phosphorous, potassium.

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Environment pollution and the food shortage are the biggest problem faced by human beings. As the world population increase food requirement also increases. To fulfil the requirement of food the farmers are dependent on the chemical fertilizers which are harmful for environment. Thus the alternate to these problems are the use of biofertilizers.

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Rice (Oryza sativa) is a staple food in many countries especially in the Asian part of the world. Rice (2n=2x=24) serves as main food diet by the majority of people. It is strictly diploid in nature. The demand for rice is increasing day by day due to increase in population pressure in India. A field experiment was conducted during Kharif season in 2015 to check the effect of different nitrogen sources on the yield of Direct Seeded Rice and also to find out the best combination of nitrogen sources for integrated nutrient management.

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The study was carried out during 2015-2016 at College of Agriculture, Navile, Shivamogga by raising single radish plant per pot. Six levels of Nitrogen, i.e. 0, 50, 75, 100, 150 and 200 percent of recommended level of nitrogen per plant (225.00 mg N/plant) were applied twice, before sowing and two weeks after sowing. Sampling for aphid Brevicoryne brassicae (L.) was done at weekly interval.

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The present study on the integrated nutrient management in aonla involved application of inorganic fertilizers, FYM and Azotobacter under different combinations during 2016 and 2017 on ten year old plant of aonla cv. NA-7. Leaf and fruit study were analyzed to determine the status of different nutrients and soil microbial population in aonla. The two years pooled data analysis revealed that highest concentration of leaf and fruit nitrogen (2.78 and 0.14%), phosphorous (0.22% and 0.030%), calcium (2.33% and 0.031%) and magnesium (0.47 and 0.

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Herbicide is the most important input in the modern agriculture. The use of herbicides has been expanding more rapidly than that of other pesticides. The injudicious application of herbicides in agriculture causes the contamination of the soil with toxic chemicals and become harmful to the microorganisms, plant, wildlife and man. In view of the above a field experiment was conducted during rabi season of 2015-16 with the groundnut variety TAG-24 with twenty four treatment combination in three replications.

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An Incubation study under laboratory condition were conducted during 2015-16 with a view to study “Influence of slow release nitrogenous fertilizers on soil enzyme activity and microbial population under laboratory condition” The laboratory incubation experiment was conducted in completely randomized design. In incubation study, the urease enzyme activity was increased with an increased period of incubation in all the treatments. Dehydrogenase enzyme activity was significantly higher in treatment GRDF at 7, 21, 45 and 90 DAA (1.41, 1.55, 1.69 and 1.56 µg TPF g-1 soil hr-1 respectively).

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A field experiment was conducted at Research Farm, Dr. RPCAU Pusa, Bihar during kharif 2018 on calcareous sandy loam soil, having pH 8.57, medium in soil organic carbon content (0.65 %), EC 0.35 dSm-1 , available nitrogen (195 kg/ha), available phosphorus (26.63 kg/ha) and available potassium (134 kg/ha). Experiment was laid-out in split-plot designand replicated thrice. Main-plot included three crop establishment methods, viz. dry direct-seeded rice (DSR-dry), wet direct-seeded rice (DSR-wet) and puddled transplanted rice (TR).

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The degradation of soil wellbeing is one of the most important predicaments to the farming community. There are several reasons for the loss of soil health. One among such issue is uncontrolled use of chemical fertilizers in agriculture ultimately worsen physical, chemical and biological properties of soil. Consequently, alternate solutions to overcome soil degradation, especially agricultural land, the natural way of farming came into existence. The concept of organic farming is mainly to utilize biofertilizers, farmyard manure, compost, vermicompost, green manuring, panchakavya, etc.

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Agricultural production is mainly depends on the health of soil, which is a measure of a complex set of biological, chemical and physical interactions driven by microorganisms. Effective microorganism increases the beneficial microbial population in the soil for sustainable crop production. Effective Microorganisms are mixed cultures of beneficial naturally-occurring organisms that can be applied as inoculants to increase the microbial diversity of soil ecosystem. They consist mainly of the photosynthesizing bacteria, lactic acid bacteria, yeasts, actinomycetes and fermenting fungi.

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Investigations on evaluation of effect of different nitrogen sources on major insect pests infesting okra was carried out at the Department of Entomology, Rajasthan Agricultural Research Institute, Durgapura, Jaipur during kharif 2016 and 2017. The major insect pests infesting okra observed during two consecutive seasons were leaf hopper, A. biguttula biguttula; whitefly, B. tabaci and okra shoot and fruit borer and E. vittella. Different sources of nitrogen were applied as different treatments to the okra crop.

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Growing population pressure and human activities increases the demand on the limited land resources, both for agricultural and other land uses. To meet this unprecedented demand of land for various pursuits, it is imperative to develop land use plans which can counteract the detrimental effects on environment and at the same time improve productivity of land.

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World population is expected to reach 9.7 billion by 2050, which makes a great challenge the achievement of food security. The use of urease inhibitors in agricultural practices has long been explored as one of the strategies to guarantee food supply in enough amounts. This is due to the fact that urea, one of the most used nitrogen (N) fertilizers worldwide, rapidly undergoes urease-driven hydrolysis on soil surface yielding up to 70% N losses to environment.

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