Agriculture Commons^™

Profit-Maximizing Potassium Fertilizer Recommendations For Soybean, Michael P. Popp, Nathan A. Slaton, Trenton L. Roberts

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Potassium (K) fertilizer has important yield and cost ramifications in soybean [Glycine max (L.) Merr.] production. Rate recommendations are often based on expected yield response as predicted by a soil test. To that end, soybean response to K application rate studies were analyzed using 86 site-years from 2004 to 2019. We estimated a generic yield response curve across soybean cultivar and soil texture to allow calculation of profit-maximizing K rates for producers in the mid-southern United States that also consider crop value and fertilizer cost. Further, we compared profit-maximizing fertilizer-K rates with those currently recommended. Using a spreadsheet-based decision …

Fate And Transport Of Phosphorus-Containing Land-Applied Swine Slurry In A Karst Watershed, A. N. Sharpley, M. B. Daniels, K. R. Brye, K. Vandevender, J. Burke, L G. Berry, P. Webb

Crop, Soil and Environmental Sciences Faculty Publications and Presentations

Phosphorus distribution in pasture soils underlain with karst geology was determined on a 0.10-ha grid in 2014, 2016, and 2018. Two fields (Fields 1 and 12) received swine slurry from a concentrated animal feeding operation, whereas another (Field 5) received mineral fertilizer. All fields were grazed by cattle and periodically hayed. Mean Mehlich-3 extractable P in the top 10 cm increased (p ≤ .05 level) for Fields 1 (59–91 mg kg⁻¹) and 12 (63–122 mg kg⁻¹) between 2014 and 2018, with little change for Field 5 (45–47 mg kg⁻¹). Over the 5-yr monitoring …

Analyzing The Management Practices Of East Texas Beef Cattle Producers, Hiliary Cheyenne Swor

Electronic Theses and Dissertations

A survey of East Texas beef cattle producers was designed to evaluate the management practices that were prevalent in the area. Demographic and cattle operation data from 103 respondents were analyzed using SPSS (Version 25; Chicago, IL). This electronic-based survey was distributed through Qualtrics. Respondents were located in Angelina, Nacogdoches, or Cherokee county. Most producers (38.8%) had a Bachelor’s degree. A negative correlation was established between castration method and weaning weight (p = - 0.204). Calves were weaned 50 pounds heavier when band or surgically castrated. Females were less likely to castrate their calves or utilize a mineral program. Approximately, …

Biosecurity Council Visit To Augusta - August 2020, Biosecurity Council Of Western Australia

Biosecurity published reports

The Biosecurity Council of Western Australia has committed to holding annual regional meetings. The intent of the regional meetings is to:

• Engage with local/regional stakeholders on biosecurity matters
• Build networks/relationships with key biosecurity stakeholders
• Provide a conduit to government/DPIRD for local/regional biosecurity stakeholders.

For its second regional meeting Council agreed to visit Augusta, located in the South West Region of Western Australia. The region is home to a large and diverse horticultural sector, aquaculture enterprises as well as livestock, for which biosecurity is important. In addition, it is a biodiversity hotspot with large tracts of natural bushland and aquatic environments …

Geology, Soils And Climate Of The Margaret River Wine Region, Peter J. Tille, Angela Stuart-Street, Peter S. Gardiner

All other publications

This report is an extract from the broader description and analysis of the Geology, soils and climate of Western Australia's wine regions. It expands on the brief descriptions in the second edition of 'Viticulture' (Coombe & Dry 2004) concerning the soils and landscapes of Western Australia’s main wine growing regions. We have tailored this report extract to the specific needs of the Margaret River wine region. It contains local soil names and soil-landscape zones and systems maps.

The wine industry recognises the importance of giving customers an understanding of the vines’ environment and how that may influence wine character …

Influence Of Cover Crop Management Practices On Rainfed Corn Production In Semi-Arid Western Nebraska, Alexandre Tonon Rosa

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

With the increased cover crop (CC) popularity, producers of semi-arid regions of western Nebraska are questioning whether they could successfully incorporate CC into their rainfed winter wheat (Triticum aestivum L.)-corn (Zea mays L.)-fallow rotations. The major concern is that CCs may deplete soil water affecting the subsequent crop. Therefore, three studies were established under rainfed conditions of western Nebraska to access the effects of CCs on soil water, soil compaction, nutrient cycling, weed demographics, residue coverage, and subsequent corn yield. The first study evaluated the influence of CC planting and termination times prior to corn establishment. Late termination …

Estimating A Fair Value For Standing Forage, Jay Parsons, Daren Redfearn, Mary E. Drewnoski

Cornhusker Economics

Several things need to be considered when deciding what value to place on standing forage. Forage prices reflect current inventories, demand, expected current season production and associated yield risk, and quality characteristics. Standing forage can be harvested in a number of different ways which need to be considered when pricing it. Below, we provide a few general thoughts and questions concerning harvesting method and comparable feed value to consider when pricing standing forage. We follow with a few examples illustrating pricing calculations for forage mechanically harvested as hay, haylage, and silage. We close with pricing considerations for forage harvested by …

Literatura Viva: Formas De Conocer La Literatura Y Agricultura Desde Chiapas, Jesse Nichols

Dissertations and Theses

Literatura Viva reflects the links between agriculture and literature in Chiapas, Mexico, demonstrating how the ways of knowing the environment which are culturally expressed through literature and the practices of sustainable agriculture are deeply linked. It argues that the experience of the agricultural working class is central not just to a physical movement towards tangible agricultural change but to a society's ability to understand its socio-cultural and natural environment. The thesis first explores indigenous literature, then agricultural practices and finally educational movements which seek to express pluriversal understandings and ways of interacting with the planet. It argues that these understandings …

Establishment Of Double Antibody Sandwich Elisa For Peanut Allergenic Protein Ara H 1, Wang Yao, Chen Xi, Wu Han-Liang, Wei Xing, Zhang Guo-Qing, Zhang Shu-Xia, Liu Sheng-Nan

Food and Machinery

In order to establish a double antibody sandwich ELISA method for the rapid, sensitive and specific detection of peanut allergenic protein Ara h 1. Taking Ara h 1 murine monoclonal antibody (mAb) as capture antibody, and Ara h 1 rabbit polyclonal antibody (pAb) as detection antibody, the checkerboard method was used to optimize the antibody working concentration to establish the method, and the detection characteristics were identified, including sensitivity, specificity, accuracy and stability of the method. Results: The optimal working concentrations of mAb and pAb were 1∶10 000 and 1∶8 000 dilution, respectively. The linear range of the ELISA standard …

Design And Simulation Analysis Of High-Efficiency Flexible Pipe Chain Conveying Equipment, Wang Zhen-Min, Li Yong-Xiang, Wang Ming-Xu, Wang Huai-Ting

Food and Machinery

Using the integrated design concept and a combination of theoretical analysis and simulation, a high-efficiency and flexible pipe chain conveyor with cleaning devices is designed. SolidWorks 3D modeling software is used to model each part of the equipment in blocks, and virtual assembly is carried out to ensure that the design structure is designed reasonably, and that the pipe chain conveyor equipment can complete the functions of conveying materials and cleaning up residue. The simulation results show that the designed pipe chain conveying equipment completes the conveying of materials while the real simulation software simulates and analyzes the key components …

Analysis Of Nutritional Quality And Antioxidant Activity Of The Seed Oil From Leping Melon, Wu Min-Fu, Li Sha, Xu Zhen-Lin, Ye Hong

Food and Machinery

In order to determine the nutritional quality and antioxidant activity of melon seed oil, the oil was extracted from the dried Leping melon seeds seed by solvent method, and its basic physical and chemical indexes were measured. The fatty acid composition, triglyceride, tocopherol, and sterol composition of melon seed oil were analyzed by the method of GC(gas chromatography) and LC(liquid chromatography), and its antioxidant activity was evaluated. The results showed that the basic physical and chemical indexes of Leping melon seed oil met the national standard of edible oil; fatty acid analysis revealed that the content of unsaturated fatty acid …

Optimization Of Extraction Process And Quality Analysis Of Pseudosciaena Crocea Liver Oil By Response Surface Methodology, Dou Xin, Wu Yan-Yan, Yang Xian-Qing, Hu Xiao, Wang Yue-Qi

Food and Machinery

The large yellow croaker liver was used as the raw material, and the optimal protease was used to extract and extract the large yellow croaker liver oil. Taking the large yellow croaker liver oil extraction rate as an evaluation index, the best enzymatic extraction process was determined through single-factor experiments and response surface experiments. The extraction rate, quality, and fatty acid composition of the large yellow croaker liver oil were compared with those obtained by light alkali method. The results showed that the best enzymatic extraction conditions were as followed: for large yellow croaker liver was using neutral protease, the …

Recent Advance In Research Of Chitin In The Field Of Food Science, Wang Yun-Tao, Yang Fang, Li Bin, Bai Yan-Hong

Food and Machinery

This review summarizes the latest research of chitin in food field, including the application of chitin film as food packaging materials, the application of chitin microspheres in immobilization, adsorption and separation of macromolecules, the preparation of nano chitin and its application in emulsification, regulation of food texture, antibacterial function, and health promoting effect, the new method for preparing chitin oligosaccharides.

Genomic Insights Into Speciation History And Local Adaptation Of An Alpine Aspen In The Qinghai–Tibet Plateau And Adjacent Highlands, Jia-Lang Li, Lin-Ling Zhong, Jing Wang, Tao Ma, Kang-Shan Mao, Lei Zhang

Aspen Bibliography

Natural selection serves as an important agent to drive and maintain interspecific divergence. Populus rotundifolia Griff. is an alpine aspen species that mainly occurs in the Qinghai–Tibet Plateau (QTP) and adjacent highlands, whereas its sister species, P. davidiana Dode, is distributed across southwest and central to northeast China in much lower altitude regions. In this study, we collected genome resequencing data of 53 P. rotundifolia and 42 P. davidiana individuals across their natural distribution regions. Our population genomic data suggest that the two species are well delimitated in the allopatric regions, but with hybrid zones in their adjacent region in …

Aspen Next Generation: Conversations From Southern Colorado And Northern New Mexico, Dan Binkley, Bill Romme

Aspen Bibliography

Aspen trees and forests are especially important in the Rocky Mountains. Aspens add beauty to landscapes, foster high diversity and productivity of understory plants, provide for the habitat needs of many species of animals, and moderate fire behavior. There is a perception that aspen trees and stands are not regenerating well in southern Colorado and northern New Mexico; cohorts of trees younger than a few decades are scarce, at least in some areas. The next generation of aspen in the southern Rockies will be influenced by land use decisions, including harvesting, fire policy and management, and browsing by livestock and …

Effects Of Different Separation Techniques On The Component Content Of Linear Maltooligosaccharides, Li Jia-Cheng, Chen Dian-Ning, Gu Zheng-Biao, Li Cai-Ming, Li Zhao-Feng

Food and Machinery

In order to improve the content of linear maltooligosaccharides with specific degree of polymerization in the enzymatic hydrolysis products, the effects were investigated including from the membrane separation, activated carbon adsorption separation, sephadex column chromatography and ion exchange resin column chromatography. The results showed that the membrane separation, activated carbon adsorption separation, sephadex column chromatography and Na⁺/Ca²⁺ ion exchange resins were all not conducive to continuous batch operation. In contrast, K+ ion exchange resins had better effects. Compared with the initial enzymatic hydrolysate, the proportion of G3~G6 and G5+G6 in the permeable solution after separation and purification …

Quality Differences And Correlation Analysis Of Natto Fermented From Soybean Seeds With Different Protein Content, Lin Yong-Shan, Gao Xiang-Yang, Cheng Jia, Zeng Jian, Chen Rui-Zhi, Liu Yu-Long, Yang Cun-Yi

Food and Machinery

Seven genotype soybean seeds with different protein content were using as the raw material for natto fermentation. The study was focus on the difference of the sensory quality and properties of mucilage on the surface of natto after fermented by Bacillus subtilis natto. Then the relationship between the quality of mucilage and the quality traits of soybean seeds was analyzed. The results showed that, the sensory score and stretch length of natto mucilage fermented from five different genotype soybean except green soybean YSG-10 and black soybean YSB-37 were significantly negatively correlated with seeds protein content respectively (r are 0.953, 0.946 …

The Effect Of Hygrothermal Degradation On The Properties Of A. Guripingensis Konjac/Κ-Carrageenan Compound Gel, Ren Yan-Yan, Li Bin, Shang Long-Chen, Li Jing

Food and Machinery

Five kinds of konjac gum from A. guripingensis which molecular weight ranges from 137.8 kDa to 621.5 kDa were obtained by hygrothermal degradation, and the differences of the key performance indicators during the sol-gel transition between them and the κ-carrageenan were compared. The results showed that the gel/sol transition temperature of the compound gel was significantly improved by the partial degraded konjac gum (415.6 kDa), compared with the original one (621.5 kDa), and the transition temperature was increase by 5.98 ℃. Meanwhile, the breaking force, the elongation at break and the water holding capacity of the compound gel were significantly …

Dynamic Analysis Of Lf-Nmr Relaxation Signals And Quality Characteristics During Heating Beef, Xie An-Guo, Wang Man-Sheng, Shi Xiao-Wei, Wang Fei-Xiang, Kang Huai-Bin

Food and Machinery

Through intensive sampling of beef during the heating process, the changes of meat quality and all parameters of relaxation signal peaks were studied. The results showed that with the increase of heating time, the semi combined water decreased while the free water increased. In terms of peak shape characteristics, T₂₁ peak width data fluctuated more, T₂₂ peak width increased and height decreased, and the positions of the three peaks shifted left significantly, which reflected that the ordered spatial structure of protein was destroyed and a large number of disordered curls were formed after heat denaturation. The average distance …

Effect Of Natural Polysaccharide On Moisture Retention Capacity And Moisture Kinetic Of Tobacco, Lei Sheng, Liu Xiu-Ming, Jiang Ju-Xing, Shao Shuai-Zhen, Zhou Xue, Zhang Xiao-Ming, Yang Qian-Xu

Food and Machinery

Thermodynamic moisture retention properties of microbial polysaccharides and seaweed polysaccharides were investigated as compared with water and propylene glycol. Then three common dynamic models of tobacco were selected to fit the hygroscopic and desorption processes of tobacco. The results showed that the moisture retention of Laminaria japonica polysaccharides and Spirulina platensis polysaccharides was significantly better than that of propylene glycol, and page model was the best. Considering the thermodynamic and kinetic factors according to the moisturizing index, Laminaria japonica, Spirulina platensis and Hericium erinaceus polysaccharides were considered to have better moisturizing effect. Low field nuclear magnetic results showed that the …

Effect Of Processing Parameters On The Structure Of Soybean Polysaccharide And Its Foaming Properties, Zhang Quan, Chen Jie, Zeng Mao-Mao, He Zhi-Yong

Food and Machinery

Soluble soy polysaccharides (SSPS) with different structure characteristics were obtained by controlling the conditions of acid hydrolysis, alkaline de-esterification and proteolysis. The effect of processing on the structure characteristics of SSPS and its foaming properties were discussed in details. The structure properties of SSPS were characterized by monosaccharide composition, average molecular weight, degree of esterification (DE), and protein content. The foaming properties of SSPS were expressed by the foam expansion rate (FE) and the foam stability (FS). The results showed that the acidic hydrolysis process could degrade the SSPS main chain structure and gradually reduce the molecular weight pf SSPS, …

Analysis Of Puff-By-Puff Release Of Nine Main Components In Mainstream Smoke Of Typical Flue-Cured Slim And Normal Cigarettes, Liu Qi, Ma Meng-Jie, Gong Zhen-Lin, Yuan Yi-Lai, Zhu Huai-Yuan, Wu Yang, Liao Hui-Yun

Food and Machinery

In order to investigate the difference of the puff-by-puff release of nine major components (tar, nicotine, CO, NNK, B[a]P, phenol, crotonaldehyde, HCN and NH3) in mainstream smoke of slim and normal cigarettes, typical flue-cured cigarette samples from same cut tobacco were smoked by smoking machine under ISO. Results showed that: ① The average puffs of slim and normal cigarettes were 5.49 and 6.72 respectively, which showed there were significant statistical differences. In general, the puff-by-puff and total release of all components from slim cigarette were lower than from normal cigarette. and puff-by-puff release deviations of tar, nicotine, NNK, B[a]P, phenol, …

Analysis And Evaluation Of Nutrient Compositions Of Miichthys Miiuy Muscle And By-Products, Sun Su-Ling, Li Xue, Gu Xiao-Hong, Zhang Yu, Wang Jun-Hong, Zhu Zuo-Yi, Wang Wei

Food and Machinery

To determine the nutrients contents in Miichthys miiuy muscle and by-products. The contents of moisture in Miichthys miiuy muscle and by-products were 79.65%, 69.15%; crude protein were 18.65%, 19.36%; crude fat were 0.24%, 3.90%; and crude ash were 1.15%, 3.75%, respectively. Total amino acids (TAA) contents of Miichthys miiuy muscle and by-products were 18.58%, 15.47%, and essential amino acids (EAA) contents were 7.65%, 5.52%, respectively. However, only EAA/TAA (41.17%) and EAA/non essential amino acids (NEAA, 69.99%) of Miichthys miiuy muscle met FAO)/WHO standard for protein profile. According to amino acid score (AAS) and chemical score (CS), methionine was the first …

Study On The Quality Of Raw And Cooked Chestnut From Different Growing Regions, Zhou Kui, Zhang Ya-Yuan, Huang Hui-Ling, You Xiang-Rong, Wang Ying, Li Ming-Juan, Wei Ping

Food and Machinery

In order to understand the comprehensive nutritional value of Guangxi chestnut growing in Counties Tiane, Longlin and Longan, the nutritional components, antioxidant components and processing characteristics of raw and cooked chestnut were compared and analyzed. The results showed that the quality of chestnut varies with the place of production and the state of ripeness. The cooked chestnut had a darker color, higher fat, amino acid content and water holding capacity, while the raw chestnut had higher soluble protein and vitamin C (V_C) content, and stronger ability of scavenging free-radical and oil-holding capacity. However, the raw chestnut exhibited the …

Detection Of Enrofloxacin Residues In Chicken Based On Surface Enhanced Raman Spectroscopy And Two-Dimensional Correlation Spectroscopy, Ban Jing-Jing, Liu Gui-Shan, He Jian-Guo, Cheng Li-Juan, Fan Nai-Yun, Yuan Rui-Rui

Food and Machinery

The surface-enhanced Raman spectroscopy (SERS) technology and the two-dimensional correlation spectroscopy (2D-COS) were used to optimize the characteristic variables of the Enrofloxacin in chicken meat. The partial least squares regression method (PLSR) was used to establish Enro the characteristic peak analysis model of sand star was compared with the competitive positive adaptive weighting algorithm (CARS). The results showed that the 2D-COS-PLSR model has the best effect, and its Rc and Rp were 0.979 7, 0.997 2 respectively, which shows that it is feasible to use 2D-COS to optimize the characteristic spectral peaks related to the concentration of enrofloxacin in chicken.

Quickly Determination Of Bromate And Nitrite In Drinking Water By High Pressure Ion Chromatography, Chen Jing-Zhou, Li Liang, Huang Shao-Man, He Shuang

Food and Machinery

A method of high pressure ion chromatography (HPIC) for quickly determinating bromate and nitrite in drinking water was established. The contents of bromate and nitrite in the sample were determined by using Dionex Integrion high-pressure ion chromatograph, IonPac AS19 high-capacity analytical column and inhibition conductivity detector, with the eluent of KOH produced on-line by automatic generation device. The anions of bromate and nitrite could be separated by the method within 5 min with detection limits of 0.46 μg/L and 0.22 μg/L respectively. In the concentration range of 0~100 μg/L for bromate and 0~50 μg/L for nitrite, a good linear relationship …

Simultaneous Determination Of 10 Kinds Of Fungicides In Tomatoes And Cucumbers By Gc-Ms/Ms Combined With Solid Phase Extraction, Zhang Yao, Wu Long-Guo, Ma Gui-Juan, Gong Hui, Gao Lin, Sun Qian

Food and Machinery

A method for the simultaneous determination of 10 fungicides residues in vegetables by gas chromatography- mass spectrometer (GC-MS/MS) was established. The samples were extracted by ethyl acetate cyclohexane, and the aminosolid phase extraction column purification was preferred. Which were detected by multi-reaction monitoring (MRM), and quantified by external standard method. The results showed that the linear relationship of 10 fungicides in the mass concentration range of 15~500 ng/mL was good, and the correlation coefficient was all greater than 0.999 1, with the detection limit of 0.1~0.5 μg/kg. The actual recoveries of the samples were 84.7%~117.0%, and the relative standard deviation …

Determination Of Ten Kind Of Metal Elements In Different Varieties Of Jiangxi Famous Tea, Ke Fa-Jun, Yang Wu-Ying, Wang Dan, Hong Yan-Ping, Chen Xin-Zhu, Wang Yu-Bo

Food and Machinery

Firstly, orthogonal test design was adopted to optimize the best working conditions (acetylene flow, hollow cathode lamp flow, burner height) of atomic absorption spectrometry for the eight kinds of essential elements, including potassium, calcium, sodium, magnesium, iron, copper, manganese, and zinc. Single-factor experimental design was adopted to optimize the best working conditions (ashing temperature, ashing time, atomization temperature, atomization time) of graphite furnace atomic absorption spectrometry for the two toxic elements of lead and cadmium. Thereafter, the standard curve of atomic absorption spectrometry for each element under the best working conditions of the instrument was established, and the detection limit …

Optimum Design Of Two Degree Freedom Seven-Bar Robot Leg Mechanism, Luo Zhong-Hua

Food and Machinery

In this paper, motion formulae of two degree freedom seven-bar mechanism are derived a mathematical model is established for optimal design of the seven-bar leg mechanism of mobile robot. The elliptic trajectory curve with the long half axis of 100 mm and the short half axis of 40 mm is selected as the relative ideal trajectory curve of robot foot endpoint. The two degree freedom seven-bar robot leg mechanism is optimized by using the genetic algorithm. The foot endpoint actual trajectory curve of the optimized seven-bar leg mechanism of robot almost coincides with the ideal elliptic trajectory curve. The maximum …

Design And Experiment Of Box Type Hot Air Drier For Fruits And Vegetables Based On Temperature And Humidity Control, Ju Hao-Yu, Zhao Hai-Yan, Yu Xian-Long, Zhang Wei-Peng, Wang Hui, Gao Zhen-Jiang, Xiao Hong-Wei

Food and Machinery

The box type hot air dryer with controlled temperature and humidity was designed. The drying machine mainly consists of internal recycle fan, heating system, humidifying equipment, weighing unit, and automatic control system. The experiment result showed that under 60 ℃ and 20% relative humidity, internal temperature and relative humidity were uniform and drying time was consistent in different positions with no significant differences. The material temperature changing curves seemed to be consistent under the same enthalpy value drying condition. Additonally, step-down relative humdity dyring method improve drying efficient a lot.