Digital Commons Network^™

On Designing The Meadow Agrocenosis Of The Polissya (Region) Of Ukraine, V F. Shchesyuk, A Y. Baluta, O V. Shchesyuk

IGC Proceedings (1977-2023)

Geobotanical studies of the natural meadow associations in the wetland areas of the Polissya rivers of the Ukraine were conducted. The Polissya represents a forested region and the rivers include the Western Buh, Vyzhivka, Turia, Stokhid, and Styr. The dominant species is Digrappis arundinacea with Poa palustris, Bromus inermis, Latirus pretense, Latirus palustris, Vicia sepium, and Urtica dioica as codominants. Research demonstrated that the green feed production of Digrappis arundinacea, in combination with Poa palustris, was significantly greater (9.5 t ha-1) than for Digrappis arundinacea alone while the crude protein content of the forage, at early flowering, …

The Nitrate Accumulation In Sorghum Sudangrass Hybrids Varying With The Level Of Nitrogen Fertilizer, C Yoon

IGC Proceedings (1977-2023)

A field experiment with 80, 160 and 240 kg N/ha application levels was carried out to study the nitrate nitrogen accumulation in the sorghum sudangrass hybrids at Iri National College of Agriculture and Technology farm in 1995. The nitrate nitrogen content of Xtragraze II exceeded the safe level of ruminants at the level of 160kg application, and decreased at the low level in the later stage of growth, but that in Civa 1990 was almost kept constant at the same level. Nitrate nitrogen accumulation of Civa 1990 was higher than that of Xtragraze II. A sum exceeding 160kg N does …

Changes In Soil Fertility And Plant Nutrient Contents In Degraded Tropical Pasture After Renovation, M C. Macedo, V.P. B. Euclides

IGC Proceedings (1977-2023)

A grazing experiment was conducted on an Oxisol testing five degraded tropical grasses renovated with two levels of fertilizer with the objective to study seasonal changes in plant nutrient contents and soil fertility. Total dry matter availability, green and dead matter availabilities, nutrient concentration in leaf tissue and soil fertility were the parameters measured. Availability of forage and leaf nutrients was significantly dependent on seasonal changes with green matter on offer decreasing over years. Soil fertility increased after renovation and declined thereafter. Soil available-P decreased and it was related to sustainability of green matter on offer. Soil organic matter mineralization …

Productivity Of Fodder Beet On Sandy Soil In Egypt, M A. El-Nahrawy, A Z. Abd El-Halim, H S. Oushy

IGC Proceedings (1977-2023)

Farmyard manure effect on the productivity of five fodder beet varieties grown on sandy soil was investigated during three successive seasons. It was revealed from the results that FYM can effectively convert the non-productive sandy soil to a relatively productive soil. FYM application resulted in an increase of 145, 97, 55, 40, 39 and 43% for dry matter. Fresh matter, germination percentage, plant height, root length and root diameter, respectively, averaged over varieties and seasons.

Brachiaria Brizantha Response To Phosphorus Rates In The Nutrient Solution, F A. Monteiro, R A. Martim, W T. Mattos

IGC Proceedings (1977-2023)

Seven phosphorus rates in the nutrient solution were studied in a greenhouse experiment for Brachiaria brizantha (Hochst) Stapf. Plants had 54 days of growth and 49 days of regrowth. Significant responses in forage yield, tiller number and root dry weight were found. Plant tops were divided into four parts and phosphorus concentration in each one significantly changed with phosphorus rates. Sampling of the young leaf blades and analyzing for phosphorus is proposed for diagnostic purposes. A critical phosphorus concentration of 1.2 g kg-1 is suggested as the critical level in the young leaf blades.

Nutrient Budget Of Themedia Triandra And Heteropogon Controtus Dominated Grasslands Of Tamil Nadu In South India, K Paliwal, K Manoharan

IGC Proceedings (1977-2023)

Nutrient availability of a grassland mainly depends on the productivity of grasses. Total 3252.20 g/m2/yr dry matter production was recorded in Themeda grassland. Annual uptake and return of nitrogen (31.10 g/m2) phosphorus (3.08 g/m2) and potassium (29.45 g/m2) through litter and belowground biomass was higher in Themeda. Themeda triandra is better fodder grass than Heteropogon contortus in the Eastern ghats grasslands.

Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl

IGC Proceedings (1977-2023)

Production of biosolids has been increasing consistently in the last few years. Land application of wastes is being regarded as an alternative means of disposal and as a source of inexpensive fertilizer material. Pastures are particularly attractive in this regard since the areas occupied are extensive and large amounts of fertilizer are required for adequate production. The objective of this study is to investigate the effects of various rates of biosolids on bahiagrass yield and quality. Forage samples were collected from each plot from April to December. Significant increases in dry matter production, crude protein content and in vitro digestibility …

An Evaluation Of The Effectiveness Of Steelworks Slag As A Fertilizer For Use On Grassland, A Younger

IGC Proceedings (1977-2023)

The objective of this work was to evaluate the steelworks by-product, steelworks slag, for use on established grassland. The effects of three rates of slag application were compared against those of lime and phosphate applications calculated to be equivalent to those applied in slag. Experiments were conducted at seven grassland sites, differing in initial pH, in the north east of England, and the treatments were evaluated in terms of their effects on both soil pH and herbage production over a three year period. Slag was effective at increasing soil pH at all sites, producing responses similar to those of limestone. …

Nutrient Uptake And Growth Stimulation Of Grasses And Legumes By Rhizosphere Microorganisms, G Hoflich

IGC Proceedings (1977-2023)

Selected Rhizobium bacteria and mycorrhiza fungi by single and combinated inoculation stimulate the growth and the nutrient uptake (nitrogen, phosphorus, potassium) of alfalfa and alfalfa-grass more than that of red clover and red clover grass. The extra yield was higher on loamy sand than on sandy loam. The proportion of legumes should be 60 to 66 % as a requirement to get positive inoculation effects and an effective N2-fixation in legumegrass- mixtures.

Effect Of N And P Fertilizers On Nutritive Value Of Dwarf Elephantgrass (Pennisetum Purpureum) Cv N-75 Mott, J R. Faria, B Gonzalez, J Faria-Marmoll, D E. Morillo

IGC Proceedings (1977-2023)

Crude protein (CP), Ca and P concentrations and in vitro dry matter digestibility (IVDMD) of irrigated dwarf elephantgrass (Pennisetum purpureum cv. N-75 Mott) as affected by the factorial combination of N (0, 150, 300 and 450 kg N/ha/year) and P (0, 50 and 100 kg P205/ha/year) fertilization was evaluated in a tropical dry forest in Zulia State, western region of Venezuela. A randomized complete block design with three replications was used. Soil was a low-fertility sandy-loam Udic Paleustalf (pH 6.1). Nitrogen fertilization did not influence (P>0.05) any of the variables. Mean CP, IVDMD, Ca and P were: 8.13, …

Effect Of The N And P On Yield And Sward And Dwarf Elephant Grass Pennisetum Purpureum Cv. Mott., J R. Faria, B Gonzalez, J Faria

IGC Proceedings (1977-2023)

The effect of nitrogen and phosphorus application on yield and sward structure as height and leaf, stem and dead forage composition of dwarf elephant grass (Pennisetum purpureum Schumach) cv. Mott was studied under field conditions and complementary irrigation, during one year at very dry tropical forest with a semiarid climate in Venezuela. The nitrogen (N) and Phosphorus (P) rate were 0, 150, 350, 450, kg ha-1 year and 0, 50 and 100 kg P2O5 ha-1 year respectively. The N rate increased the plant height (81.52 cm), leaf, stem and death production (10, 8.13, and 1.62 t DM ha-1 respectively) …

Effects Of Different Phosphate Fertilizers On Pasture Nutrition And Soil Phosphorus In Canterbury, New Zealand, L M. Condron, K M. Goh

IGC Proceedings (1977-2023)

A field trial was conducted over 6 years to assess the relative performance of three phosphate (P) fertilisers of differing solubility (single superphosphate, ‘longlife’ superphosphate, ‘reactive’ phosphate rock) on a permanent pasture at Methven in Canterbury, New Zealand. Plant P uptake data showed that while the overall relative effectiveness of the fertilisers was closely related to their water-soluble P content (single superphosphate > ‘longlife’ superphosphate > ‘reactive’ phosphate rock), the agronomic efficiency of the sparingly soluble phosphate rock fertiliser improved markedly with time. Soil P analysis demonstrated that significant dissolution of phosphate rock had occurred in the soil, and the findings of …

Field Evaluation Of Soil Acidity Acidity Effects On The Growth Of Annual And Perennial Ryegrasses, N Miles

IGC Proceedings (1977-2023)

Soil acidity limits pasture establishment and productivity in the moister eastern half of South Africa. Sound lime requirement guidelines based on soil test data are required. In the study reported here, lime responses of annual (Lolium multiflorum) and perennial (Lolium perenne) ryegrasses were evaluated in irrigated field trials located on acidic, highly weathered soils. Annual ryegrass (yield response to lime 27 to 32%) was found to be markedly more tolerant of soil acidity than perennial ryegrass (yield response 68%). Acid saturations of up to 20% had little impact on the yield of annual ryegrass, while yield …

An Integrated Soil Testing-Modeling Approach To Improve Fertilizer Recommendations For Grassland, L Brown, D Scholefield, E C. Jewkes, N Preedy

IGC Proceedings (1977-2023)

New management strategies are required in order to reduce the appreciable emissions of N from intensively managed grassland. Previous work has shown that if fertiliser is applied at rates that take account of the mineral N found in soil at the time of each application, N use efficiency can be improved. A novel approach is described which integrates soil testing and modelling to produce N fertiliser recommendations on a monthly basis. An existing annual model of the N cycle in grassland has been modified to produce monthly predictions of mineral N in the soil. The model is being validated by …

Liming Of Acid Soils. I. Influence On Wheat Yield And Availability Of Soil Nutrients, C D. Tsadilas, V Samaras, J Varvarousis, N Maslaris

IGC Proceedings (1977-2023)

With a two year field experiment the influence of liming of strongly acid soils on wheat yield and on the availability of soil nutrients were studied. The results showed that liming increased soil pH and decreased exchangeable Al and available Fe and Zn. Wheat uptake of Mn was decreased, while P and Cu uptake were increased. Wheat biomass (hay plus seed) production and grain yield were also significantly increased.

Nitrogen Fertilization In Winter Forage Crops In The Southeast Of Buenos Aires Province (Argentina), M A. Marino, A Mazzanti, H E. Echeverria, F Andrade

IGC Proceedings (1977-2023)

The potential growth in the winter annual forage crops in the Southeast of Buenos Aires Province (Argentina), is limited by the availability of nitrogen during the winter period. The effect of nitrogen fertilization on growth of the two main winter forage crops: oat (Avena sativa) and annual ryegrass (Lolium multiflorum Lam) was analyzed. Under winter-spring temperatures a higher growth potential was shown by annual ryegrass. The critical N doses were 150 and 100 kg.ha-1 of N for oat and annual ryegrass, respectively. The nitrogen dilution curves and the critical N concentration in the forage were determined. The …

Yield And Quality Of Sugarcane As Affected By Phosphate Applied Cation On Soils Of Various Phosphorus Levels, M A. Matin, K Oya, T Shinjo, T Horiguchi

IGC Proceedings (1977-2023)

Effects of phosphate application on the growth, yield and quality of sugarcane (Saccharum officinarum L.) were studied on the soils having various phosphorus levels. Superphosphate was applied to bring the available soil P at 5, 15, 25 and 35 mg P2O5 100 g-1 designated as A, B, C and D levels, respectively. Leaf area index (LAI) and dry matter increased on the higher P plots over the lower P plots. The highest cane yield (74 t ha-1) and sugar yield (10.2 t ha- 1) were obtained from the B plot and the lowest cane yield (51 t ha-1) and sugar …

Lucerne Decline: The Role Of Acidification, D J. Koopman, P G. Tow, T G. Reeves

IGC Proceedings (1977-2023)

Paddock surveys and preliminary glasshouse experiments have identified acidification of the surface soil layers as a contributing factor to the problem of declining lucerne yields occurring in the mid north region of South Australia. In a field experiment, lime application at rates of 2 t/ha and 4 t/ha significantly improved the growth of lucerne in a soil with an acidic topsoil and alkaline subsoil. Lime incorporated into the soil had an initial short term advantage of improving lucerne production over lime applied to the soil surface. By the end of the first season there was no benefit of incorporated lime …

Evaluation Of Different Bradyrhizobium Sp Strains On Nitrogen Fixation Capacity In Four Forage Legumes, F O. Gallardo, E S. Lopes, M C. Diez

IGC Proceedings (1977-2023)

Eleven available strains of Bradyrhizobium sp were used to test four forage legumes, Crotalaria juncea (Crotalaria), Cajanus cajans (Guandu), Styzolobium deeriagianum (Mucuna-Ana) and Cyamopsis tetragonoloba (Guar) for symbiotic N-fixation ability. Greenhouse experiments were conducted for nine weeks in order to evaluate shoot, root, and nodule dry weight, nodule number, and shoot nitrogen content. Four strains presented relative nitrogen efficiency (RNE) over 100% with Crotalaria cultivar, whereas only one strain was more efficient with Guandu and Mucuna cultivars. Strain 633 was the only one which presented a high yield with Crotalaria, Guandu and Mucuna-Ana cultivars.

Use Of Reactive Phosphate Rock For Pastures On The Southern Tablelands Of Nsw, Australia, D L. Garden, P R. Dann, I J. Mcgowen, C O'Malley

IGC Proceedings (1977-2023)

A comparison was made of pasture production from phosphate fertilisers, including superphosphate, reactive phosphate rocks (RPRs) and a non-reactive phosphate rock at two sites on the Southern tablelands of NSW, Australia. Production from all phosphate rocks was low in the first year at both sites, but RPRs were similar to superphosphate by the fourth year. Production from RPRs was low in a dry year which is consistent with the requirement for moist acid soils for effective release of P from RPRs. Performance of RPRs was better at the site which was moister and had higher summer rainfall.

Increased Phosphorus Supply Enhances Water Uptake And Water Use Efficiency In White Clover Under Dry Conditions, D K. Singh, P.W. G. Sale

IGC Proceedings (1977-2023)

A glasshouse experiment was carried out to determine how increasing rates of P supply (0, 33, 100 and 300 kg P ha-1) influenced the water use efficiency of white clover grown in a P-deficient soil under dry conditions. Increasing the P supply enhanced both shoot dry matter yield and water use by the clover plants. The relatively greater dry matter response meant that water use efficiency also increased with added P. High rates of water extraction by these high-P clover plants resulted in a marked drying of soil. Despite these dry soil conditions there was no adverse effect on growth …

N-P-S Fertilizer Effects On Brute Protein Content In A Native Meadow In Tierra Del Fuego, L San Martino, E.C. E. Livraghi, M Jacob, S San Martino, E.E A. Santa Cruz

IGC Proceedings (1977-2023)

Fertilization may have a positive effect in improving forage quantity and quality in natural meadows of Tierra del Fuego. The objective of the present study was to estimate N-P-S fertilizer effects on forage quality. The trial was set up in 1994 on an Entic Haploborol soil characterized by low P availability (12 ppm, Truog), high N content (1.5% total N) and medium acudity (pH 5.9). A Complete Randomized Split Plot Design was used and N-P2O5-S nutrients were applied at a rate of 120-100-50 kg.ha-1 . Monthly mowing began in January and finished in April 1995. CP and IVDMD were determined. …

N-P-S Fertilizer Effects On Herbage Yield And Brute Protein Contents In An Irrigated Perennial Pasture In South Patagonia, L San Martino, H M. Espina, E Cittadini

IGC Proceedings (1977-2023)

Little research has been done to determine the effect of fertilization on irrigated pastures in Santa Cruz (South Patagonia). The objective of the present study was to estimate the effects of NPS fertilizing effects on forage yield and quality. The trial was set up in 1994 on a Borolic Haplargid soil characterized by low N content (0.00875% total N), low P availability (9 ppm Olsen) and medium alcalinity (pH 8.4). Pasture was dominated by tall fescue (95%) with 5% of alfalfa. A Complete Radom Design was used and N-P2O5-S nutrients were applied at rates of 120-100-50 kg.ha-1. Monthly mowing began …

Changes In Soil Microbial Biomass-N Under Ryegrass/White Clover Grazed Pastures Based On Symbiotic N Fixation And Fertilizer N, R Ruz, H Troncoso, L Longeri, E Jahn, I Vidal

IGC Proceedings (1977-2023)

Soil microbial biomass nitrogen (BN ) was periodically measured in two pastures a) grazed pastures without N fertilizer and b) grazed pastures receiving 200 kg of fertilizer N per year, respectively, during July 1993 to July 1994. Soil type was a volcanic soil Medial, thermic, Typic Distrandept. BN was highly variable and the two type of pastures showed a similar pattern of distribution, with statistical differences in only three sampling. Values of BN were lower than that found in other studies of temperate regions, but also the BN was significantly higher than the available pool of mineral N, indicating the …

Benefits Of Applying Cow Slurry In Bands Beneath Grass Canopies, S Bittman, C G. Kowalenko, O Schmidt, D E. Hunt

IGC Proceedings (1977-2023)

Efficient methods of application may enable dairy producers to use slurry manure as aoereplacement for inorganic nitrogen on grassland. This study compares the effect of slurry applied in bands beneath the grass canopy (drag-shoe) with a broadcast of slurry on top of the canopy (splash-plate), and with fertilizer nitrogen on yield of grass. Trials were conducted in spring, summer and fall of 1995 on established tall fescue in south-coastal B.C. Slurry manure was applied by drag-shoe or splash-plate at 50 and 100 kg ha-1 (nominally), at start of grass regrowth or 7-8 days later. A range of rates of NH4NO3 …

The Effect Of Fertiliser History On Nutrient Accumulation And Plant-Available Nutrient Supply In Legume-Based Pasture Soils, J L. Moir, M J. Hedley, A D. Mackay, R W. Tillman

IGC Proceedings (1977-2023)

Animal production in New Zealand is dependent on pastoral legumes to build soil nitrogen fertility, which otherwise limits the growth of the major sward component, grass. Traditionally, in order to sustain legume vigour, single superphosphate has been applied to elevate soil phosphorus and sulphur levels. Rarely have either the agronomic or nutrient efficiencies of these systems been assessed. Fourteen hill country pasture sites in three broad rainfall regimes were chosen to assess the effect of contrasting fertiliser histories on soil fertility, in particular nitrogen availability. At each site soil fertility indices and pasture production for the 1993/94 growing season were …

Responses Of Red Clover To Inoculation With Endophytic Bacteria From Root Nodules, A V. Sturz, B R. Christie, B G. Matheson, J Nowak

IGC Proceedings (1977-2023)

The aim of this study was to identify endophytic bacteria isolated from the nodules of healthy red clover plants (Trifolium pratense L.) and to assess their effects, alone and in combination with Rhizobium, on the growth and development of red clover seedlings. Clover root nodules were host to 12 bacteria species other than rhizobia. In root bacterization experiments, root nodule bacteria often promoted in vitro growth and nodulation of red clover when applied in combination with R. leguminosarum BV trifolii. Instances of growth depression were fewer in mixed than in individual bacterial applications. Single isolate applications of Rhizobium species to …

Anonymized Identity Recognition And Classification Using Privacy Preserving Facial Encoding, Manas Sanjay Pakalapati

USF Tampa Graduate Theses and Dissertations

The need for sharing large-scale datasets to train deep neural network models, particularly in healthcare, raises significant data security and privacy concerns. To address these issues, methods such as data encryption or encoding are utilized. These techniques can encrypt the data and make it unreadable to humans, while still retaining its usefulness for training models.

In this study, we investigate various image encoding techniques designed to protect privacy by making images unrecognizable while still retaining their usefulness for model training. Our investigation utilized publicly available facial databases and focused on evaluating the trade-offs inherent in image encoding techniques, with a …

Discovery Of Runs-Of-Homozygosity Diplotype Clusters And Their Associations With Diseases In Uk Biobank, Ardalan Naseri, Degui Zhi, Shaojie Zhang

Faculty, Staff and Student Publications

Runs-of-homozygosity (ROH) segments, contiguous homozygous regions in a genome were traditionally linked to families and inbred populations. However, a growing literature suggests that ROHs are ubiquitous in outbred populations. Still, most existing genetic studies of ROH in populations are limited to aggregated ROH content across the genome, which does not offer the resolution for mapping causal loci. This limitation is mainly due to a lack of methods for the efficient identification of shared ROH diplotypes. Here, we present a new method, ROH-DICE (runs-of-homozygous diplotype cluster enumerator), to find large ROH diplotype clusters, sufficiently long ROHs shared by a sufficient number …

Study Of Prognostic Splicing Factors In Cancer Using Machine Learning Approaches, Mengyuan Yang, Jiajia Liu, Pora Kim, Xiaobo Zhou

Faculty, Staff and Student Publications

Splicing factors (SFs) are the major RNA-binding proteins (RBPs) and key molecules that regulate the splicing of mRNA molecules through binding to mRNAs. The expression of splicing factors is frequently deregulated in different cancer types, causing the generation of oncogenic proteins involved in cancer hallmarks. In this study, we investigated the genes that encode RNA-binding proteins and identified potential splicing factors that contribute to the aberrant splicing applying a random forest classification model. The result suggested 56 splicing factors were related to the prognosis of 13 cancers, two SF complexes in liver hepatocellular carcinoma, and one SF complex in esophageal …