Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"inorganic fertilizer"”.
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The effect of spent mushroom compost on soil conditions and plant growth
… compare leaching losses from SMC with those from inorganic fertilizer; and to develop practical guidelines for SMC use. The SMC investigated contained 1.8% N (of which 94% was organic), 0.8% P, 1.6% K, 1.3% S (of which 17% was organic), 5.9% Ca and 0.4% Mg (on a dry weight basis) and was obtained …
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Effects of Biosolids on Tall Fescue-Kentucky Bluegrass Sod Production and Soil Chemical and Physical Properties
… turfgrass establishment and growth more than fertilizer alone, but few studies have investigated the production of turfgrass using uncomposted biosolids. Increasingly employed treatment methods that generate pathogen-free, low pollutant-containing biosolids are creating alternative products …
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Carbon dioxide emissions from selected soils in Zambia : effects of nitrogenous fertilizer and agricultural lime.
… effects of applying agricultural lime and an NPK fertilizer on CO2 emissions from soils and to identify soil properties that have a significant influence on soil organic carbon (SOC) contents and on soil organic carbon mineralization. Soil samples collected from surface horizons of cultivated …
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Essays on Malawian agriculture: Micro-level welfare impacts of agricultural productivity; profitability of fertilizer use; and targeting of fertilizer subsidy programs
… second essay estimates the profitability of inorganic fertilizer use in maize production using fixed effects and multilevel models. The study finds that fertilizer use is generally unprofitable at prevailing market conditions when one assumes farmers incur positive transaction costs in the …
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Long-term Impacts of Annual Cattle Manure and Fertilizer on Soil Quality Under Corn-Soybean Rotation in Eastern South Dakota
… sites to assess the impacts of manure and inorganic fertilizer application rates on some of the soil quality indicators and greenhouse gas emissions (GHGs) in a corn (<em>Zea mays</em> L.) - soybean (<em>Glycine max</em> L.) rotation system located at Beresford and Brookings in Eastern …
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Influence of Poultry Litter on Dark Tobacco Growth and Soil Nutrient Availability
… high value of dark tobacco compared with fertilizer costs, nitrogen is recommended at levels as high as 338 kg ha"1. Such rates of inorganic fertilizers increase the osmotic pressure of the soil solution and soil acidity, often causing reduced stands, Mn toxicity, Mo and Ca deficiencies, …
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Crop Yields Response To Conservation Farming And Spatial-Temporal Effects In Zambia
… With addition of different organic and inorganic amendments, average CF yield ranged from 1 to 4 t ha-1, with highest in wetter region (3.4±7.9 t ha-1) and lowest (2.1±6.8 t ha-1) in degraded plateaus. Combined additions of inorganic fertilizer (NP-K at 200-100-100 kg ha-1) with biochar …
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Poultry Litter as a Nutrient Source for Low Input Forage Systems
… to compare the effects of poultry litter and inorganic fertilizers on soil fertility, aboveground botanical composition and soil seed bank composition of established mixed naturalized pastures. Two sites each had the following treatments applied for two consecutive years: 1) split application …
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Comparisons of crop yields using semi-organic and inorganic fertilizers
… experiments is described in which a semi-organic fertilizer is compared to the more widely used inorganic type. A semi-organic fertilizer contains a base of organic materials to which is added a mixture of inorganic salts to make up a suitable analysis. The results from three years field trials …
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Assessment of Exceptional Quality Biosolids for Urban Agriculture
Biosolids have been used as soil conditioners and fertilizers in agriculture and mine land reclamation, but application of Exceptional Quality (EQ) biosolids to rehabilitate anthropogenic soils for urban agriculture is recent and requires greater study to ensure their appropriate use. The …
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Energy in the Corn Belt: Is Maize Production Sustainable?
… 2) The Tractor Epoch, 1920-1950; 3) The Fertilizer Epoch, 1950-1980; and 4) The Biotechnology and Precision Agriculture Epoch, 1980-2010. The energy budget method was used to measure the energy sustainability of corn production. The findings show that the volume of corn grain yield …
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Comparison of Nutrient Concentration in Four Fertility Treatments After Poultry Litter Application to Orchardgrass and Sorghum-Sundangrass Hayfield Soils
… separate fertility treatments were utilized: inorganic fertilizer (I), poultry litter applied to meet nitrogen requirements (N), poultry litter applied to meet phosphorous requirements (P), and poultry litter applied to meet phosphorous requirements with a supplemental inorganic fertilizer …
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Surface Runoff Quality in Grasslands Fertilized with Broiler Litter
… litter applications in 1995 and 1996, and only inorganic fertilizer N in 1997 and 1998. Runoff from each paddock was measured, sampled, and analyzed for NH₄+-N and DRP. Flow-weighted NH₄+-N and DRP concentrations increased from background values of 0.5 and 0.4 mg L-1, respectively, to values as …
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Immobilization of Tetrabromobisphenol A On Pinecone-Derived Biochar
… initial concentration changed. The influences of inorganic fertilizer ions (NH4+, PO43− and NO3− ) on the immobilization of TBBPA by pinecone biochars were revealed through fractional-factorial assisted analysis. The results indicated the main effects include negative effects of PO43− , positive …
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Drought Resistance Response of Tall Fescue Established in Disturbed Urban Soils Utilizing Biosolids
… biosolids-based soil amendments with synthetic fertilizer on the growth and quality of tall fescue (Schedonorus arundinaceus) under two different soil moisture regimes. The research site was a disturbed soil at the Virginia Tech Turfgrass Research Center in Blacksburg, Virginia. The experimental …
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Comparison of Soil Bulk Density After Poultry Litter Application
… Poultry litter treatments were compared with inorganic fertilizers. The same basic fertility treatments were applied in this study from 2001-2006. Those treatments consisted of poultry litter applied at the nitrogen rate (NPL), poultry litter applied at the phosphorus rate only (PPL), poultry …
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Maize response to fertilizer and fertilizer-use decisions for farmers in Ghana
… likely be increased by intensifying the use of fertilizer, other inputs, and irrigation systems. Recently, Ghana introduced a fertilizer subsidy program to help increase fertilizer-use rates, however, little work has been done to examine the effectiveness of this program, or to determine the …
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Nutrient and Bacterial Transport From Agricultural Lands Fertlized With Different Animal Manures
… treated with poultry litter, dairy manure and inorganic fertilizer according to the P requirements of the crop. Three simulated rainfall events were conducted 1, 2 and 35 days after planting of corn. Highest P and N concentrations were observed in the runoff from plots treated with poultry …
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Residual Nutrient Removal by a Winter Cover Crop From Broiler Litter Amended Soils
… P rate [Litter-Pj; and soil amended with inorganic fertilizer [INORG], Sorghum sudangrass was seeded in the spring and rye planted after the last harvest of the season. Forage acid detergent fiber (ADF), neutral detergent fiber (NDF), crude protein (CP), P, Cu, Fe, and Zn were determined, …
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INITIAL IMPACTS OF DIFFERENT FERTILIZERS ON IMPROVED EAST TEXAS EQUINE PASTURES
… This study assessed the effects of organic and inorganic fertilizer treatments on improved Bermudagrass (BG) and other vegetation (OTH) in overgrazed equine pastures at the Stephen F. Austin State University Equine Center. Treatments included equine manure (H), broiler poultry litter (P), and a …
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