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.
Results
Showing 1 to 20 of 106 for “"fertilizer application"”.
-
Evaluation of Urea Ammonium-Nitrate Fertilizer Application Methods
… created a need to reevaluate current sidedress N application recommendations for corn. Injection of Urea Ammonium-Nitrate (UAN) may reduce N-loss via ammonia (NH?) volatilization compared to current surface application methods. This study evaluated injection and surface-banding application …
-
Growth and Physiological Responses to Fertilizer Application in Clonal Loblolly Pine
… throughout the southeastern United States. Fertilizer has been applied to more than 6.5 million hectares of plantations to alleviate deficiencies of nitrogen and phosphorus that limit growth. Because cloning loblolly pine in large numbers has only become possible in the last decade, it is …
-
Analysis and Control of Rate and Uniformity for Granular Fertilizer Application Systems
… for the friction coefficient. Data for the same fertilizer materials Ammonium Nitrate and Potassium Chloride indicated that the rheometer is not a good instrument to obtain friction coefficients with practical value, whereas the data from the spinning tube device is consistent with measured …
-
Spatial Variability of Plant Nutrients in Two Illinois Fields
… global positioning technology and variable rate fertilizer application equipment at the same time in which environmental and economic considerations guide many grower decisions concerning fertilizer application have raised old questions concerning the spatial variability of soil supplied plant …
-
Legacy Effects of Long-term Manure Applications on Soil-derived Nitrous Oxide Emissions
Termination of the manure application treatments at the Dixon long-term manure research site in Humboldt, Saskatchewan provided a unique opportunity to explore how a change in management regime to annual urea applications would affect nitrous oxide (N2O) emissions. My hypotheses were that long-term …
-
EFFECT OF MYCORRHIZAE INOCULATION ON THE GROWTH AND SUCCESS OF THREE TAXODIUM DISTICHUM HYBRIDS IN SALINE - IMPACTED COASTAL SOILS
… treatments applied were mycorrhizae inoculation, fertilizer application, and a combination of mycorrhizae inoculation and fertilizer application. A total of sixty (60) trees planted in plots of three rows and divided into five randomized replication blocks of four treatments each were used. Plants …
-
Behavioral responses and policy evaluation: Revisiting water and fuel policies
… sizable impact on the inefficiency of irrigation applications; thus, policies eliminating electricity cost-sharing mechanisms have a substantial effect on decreasing groundwater depletion. In contrast, price-based policies are less effective, and policies targeting well-sharing do not have …
-
Strip-Tillage Production Systems for Tobacco
… control and lack of acceptable pesticide and fertilizer application resulted in consistently lower yields and inferior cured leaf quality. The development of new conservation tillage equipment, improved methods of fertilizer application, and new herbicides, have resulted in a renewed interest …
-
Nutrient Movement in Streamside Management Zones and Piedmont Streams Following Forest Fertilization
… widths for controlling nutrient fluxes following fertilizer application. Diammonium phosphate (DAP) and urea fertilizers were applied to subwatersheds of 2 to 3 year-old loblolly pine (Pinus taeda L.) plantations upslope from SMZ study areas throughout Buckingham Co., VA. Three replications of …
-
The response of symbiotic performance, growth and yield of chickpea (Cicer arietinum L. ) genotypes to phosphorus fertilizer rates and rhizobial inoculation
… Small-scale farmer’s flounder to afford Nfertilizers, coupled with the challenges faced by programmes aimed at assisting them about soil fertility in their cropping fields that are still without enough N concentration to meet N demand. It is therefore important that other alternatives that …
-
A spatial analysis of phosphorus in the Mississippi River Basin
… the MRB from 1997 through 2006 including data on fertilizer application, major crop acreage and harvest, animal numbers for manure inputs and human population. Landscape and climate characteristics of tile drainage, soil characteristics, slope and precipitation were also included. Riverine yields …
-
Comparison of Soil Bulk Density After Poultry Litter Application
… to monitor the effects of poultry litter application on soil bulk density. A randomized split block design was used for this study. The soil was a Crider silt loam (Typic Paleudalf). Poultry litter treatments were compared with inorganic fertilizers. The same basic fertility treatments …
-
The effect of oily waste and nutrient amendments on soil fertility and oat growth
… adding oily waste alone and in combination with fertilizer and hog manure on: 1) soil macronutrient supply 2) growth and nutrient uptake by oats and 3) relevant physical properties affecting plant growth Addition of urea and manure with the sludge resulted in significantly higher supplies of …
-
Evaluating an Advanced Intensive Management Strategy for Virginia Wheat
… of 7400 kg ha⁻¹. Increases in nitrogen (N) fertilizer application rates and splits, a chelated micronutrient blend, increased seeding rates, and a "no tolerance" pest control methodology were compared to current intensive management practices in this study. Additional fall N application and …
-
Yellow Perch Production and Harvest Strategies for Semi-Permanent Wetlands in Eastern South Dakota
… perch. I measured the effect of nitrogen (urea) fertilizer application on primary production, prey availability, and yellow perch growth in experimental and control ponds. Fertilization increased nitrogen levels and stimulated primary production in experimental ponds. However, effects of …
-
Stormwater-borne pollutant export from turfgrass established on soils amended with composted domestic wastewater sludges
… export from identical land areas treated with fertilizer and/or composted domestic wastewater sludge (compost) were evaluated. Three plots were constructed with a Glenelg silty clay soil and seeded with Falcon fescue (Festuca 'Falcon'): Plot 1 received conventional fertilizer; Plot 2 received a …
-
Soil-Specific, Late-Season Nitrogen and Potassium Applications to Increase Corn Yields in the Mid-Atlantic Coastal Plain
… to late-season (just prior to tassel) N and K fertilizer applications, and enabled the proposal of a method to predict potential for corn to utilize late-season N applications based on soil moisture. In an experiment to evaluate late-season fertilizer application rates, N and K were applied in …
-
Screening of indigenous forage legumes as potential fodder crops and protein source for livestock in Central Namibia
… at varying levels (0, 60, 80 and 100 kg P/ha). Fertilizer application up to 80 kg P/ha increased biomass and 100-seed weight; responses for O. burchellii were however inconsistent. The legumes differed (P < 0.05) in biomass yield; least square means (tons/ha) were: L. purpureus (8.9 ± 0.3), V. …
-
Numerical modeling of agricultural tile drainage water quality with health considerations
Nitrogen fertilizers are an anthropogenic source of potential human and environmental health concerns. Variable rate fertilizer application technologies utilized by production agriculture increase the complexity of interactions with the natural environment, notably water quality originating from …
-
Nitrogen and phosphorus fertilization for efficient corn production in Virginia
… com fertilization methods of broadcasting N fertilizer, and applying P fertilizer to soils testing high to very high in plant-available P, can be inefficent. Experiments were conducted at several locations in Virginia to evaluate if band applications of N fertilizer are more efficient than …
Page 1 of 6