Agricultural Science Commons^™

Duration Of Regrowth Of Ryegrass (Lolium Perenne) Swards: Effects On Rumen Fermentation Of Lactating Dairy Cows, P. Chilibroste, S. Tamminga, H. Boer

IGC Proceedings (1977-2023)

The relative importance of duration of sward regrowth and rumen fill and fermentation on the control of grazing time and intake rate during the first grazing session of the day were studied. Four lactating dairy cows were allowed to graze ryegrass (Lolium perenne) swards, with five different regrowth periods after mowing (6, 9, 16, 22 and 30 d). The cows were allowed to graze until they stopped voluntarily. Samples of rumen liquid were taken at approximately 0, 30, 60, 120 and 240 min after the grazing session was finished. Concentration of volatile fatty acids (VFA) followed a significant …

Establishment Of Tanzania Grass Pasture Using Millet As A Companion Crop, José C. Pinto, M. C. Maia, I. F. De Andrade, I. P. A. Dos Santos, E. R. P. Bomfim, K. R. Soares

IGC Proceedings (1977-2023)

Forage yield and quality of millet [Pennisetum glaucum (L.) R. Br.] and tanzania grass (Panicum maximum Jacq. cv. Tanzania I) were evaluated when grown in mixture. The treatments evaluated were four seed mixture combinations, based on a standard sowing density of 8 kg.ha^-1, of tanzania grass/millet (08/00; 05/03; 04/04 and 03/05 kg.ha^-1) and three cutting frequencies (1 cutting – 100th day after sowing; 2 cuttings – 50th and 100th days after sowing and 3 cuttings – 40th, 70th and 100th days after sowing), in a randomized complete block design, with four replications, in a …

Evaluation And Utilization Of A Tall Fescue Germplasm Collection At Pergamino Inta, Argentina, B. S. Rosso, E. M. Pagano, P. Rimieri

IGC Proceedings (1977-2023)

One hundred and fifty four accessions of tall fescue (Festuca arundinacea Schreb.) representing different types grown around the world were evaluated at Pergamino Inta Experimental Station. A multivariate analysis was carried out to evaluate individual and group variations. Three principal components (PCs) explained 70 % of the variation. Cluster analysis (Ward method) allowed the identification of 7 groups of populations. Plants from the most promising populations were selected in order to form a new breeding gene pool. The main objective of this study is to develop a new cultivar with improved winter herbage yield. Selected genotypes were mostly of …

Effects Of Selection On Morphological Characteristics In Setaria Sphacelata (Schumach.) Moss, Liana Jank, Kenneth H. Quesenberry, P. Mislevy

IGC Proceedings (1977-2023)

Cattle production in Florida is limited by the lack of available warm-season forages adapted to the cool winters of the region. Setaria (S. sphacelata) has demonstrated green growth during cool conditions in subtropical climates around the world, and has the potential to fill this niche in cattle production in Florida. Four populations were selected in Gainesville and Ona, Florida: two cycles of selection for increased head number, one cycle for increased leaf width and one cycle for grazing tolerance. The objectives of this research were to compare these populations morphologically to determine changes due to selection. Selection for …

Evaluation Of Leucaena Genotypes, F. B. Sousa, M. R. A. Araujo, J. A. Araujo Filho, J. Sousa Neto

IGC Proceedings (1977-2023)

The objectives of this study were to evaluate the leucaena (Leucaena leucocephala) performance and to select the best genotypes, based on yield,.stability parameters, and quality parameters. Annual leucaena yields were obtained by cuts over the rainy and dry seasons. A combined analysis of variance for yield, and quality parameters was performed. Also stability parameters and coeficients of determination were estimated. The combined ANOVA for edible dry matter yield and for acid detergent fiber, and digestibility revealed a significant difference for genotypes, environments, genotypes x environments, row spacings, cutting frequencies, and cutting heights, Six genotypes of leucaena were selected …

Genotype-Environment Interaction For Forage Yield Of Vetch (Vicia Sativa L.) In Mediterranean Environments, G. Pacucci, C. Troccoli

IGC Proceedings (1977-2023)

Genotype x environment (GE) interactions limit the effectiveness of selection when selection is based only on mean yields. The objective of this study was to evaluate the amount of GE interaction for vetch forage yield in some environments of Southern Italy, and to analyze some stability parameters that can be useful in the selection of genotypes adapted to Mediterranean environmental conditions. Eleven vetch genotypes were grown in a total of 16 environments in Southern Italy. The combined analysis of variance for forage yield showed that the environment, genotype and GE interaction terms were significant at 0.01 level, suggesting a broad …

Initial Biomass Production And Soluble Carbohydrate Partitioning Of Contrasting Elephantgrass Genotypes, L. P. Passos, M. C. Vidigal, R. S. Verneque

IGC Proceedings (1977-2023)

The initial growth and soluble carbohydrate (SC) partitioning were examined in the following classes of elephantgrass (Pennisetum purpureum Schum.) genotypes: Dwarf (Anão, Mott and Roxo); Cameroon (Cameroon, Cameroon Piracicaba and Vruckwona); Embrapa hybrids (CNPGL F27-5 and Pioneiro); Interspecific hybrids (Hexaploide 201, Mercker X 23-A and Napier X 23-A; Mercker (Mercker Comum, Mercker Pinda and Teresópolis); and Napier (E.C. Itapemirim, Mineiro and Napier). After a 60-day growing period, total, leaf, stem and root FW and DW and stem, stem base, leaf and root SC content were determined. Cameroon-class cultivars showed the highest leaf and stem DW and whole stem SC …

Evaluation Of Guineagrass (Panicum Maximum Jacq) Hybrids In Brazil, Liana Jank, Cacilda B. Do Valle, J. De Carvalho, S. Calixto

IGC Proceedings (1977-2023)

Guineagrass (Panicum maximum Jacq.) is responsible for a high percentage of cattle finishing and milk production in Brazil, but presents problems of pasture degradability due to high soil fertility requirements and uneven production distribution. In order to search for new varieties to reduce these problems, over four hundred apomictic accessions of guineagrass and several sexual plants were introduced to Brazil in 1982. Agronomic evaluation took place at the National Beef Cattle Research Center of the Brazilian Agricultural Research Corporation (Embrapa Beef Cattle), in Campo Grande, MS, Brazil. Breeding of the apomictic species began in 1990 using sexual x apomictic …

Taxonomical Study Of Plant Species In Wadi Awaj (Al-Lasab) At Coastal Region Of Hadramout – Yemen, Mahroos Abdulla Ba-Hawerith, Mohammed Saeed Bin Qadim, Murad Mohammed Kanji, Dhekra Abdulla Maqram, Hassan Pyar Ali

Hadhramout University Journal of Natural & Applied Sciences

This study was carried out to identify the plant species of Wadi Awaj (Al-Lasab) in Hadhramout governorate. The results of the field survey identified a total of 47 plant species 26 families and 43 genera including 39 wild plant species grown naturally. The total number of cultivated plants was 6 plant species, only two plant species are grown as both wild and cultivated species. The dicots were 43 species while monocots were represented as 4 species. The most dominant families were: Fabaceae(8 species and 5 genera), Apocynaceae (5 species and 5 genera), Euphorbiaceae, Poaceae and Zygophyllaceae (3 species and 3 …

A Study Of Morphological Characteristics And Yield Components Of Date Palms (Phoenix Dactylifera L.) Cultivars )Scotri( At Some Farms In Hajar Valley Areas -Hadhramout Governorate, Yemen, Naif Mohammed Balateef, Salem Mohammed Bin Salman

Hadhramout University Journal of Natural & Applied Sciences

This study was conducted at some farmers of date Palm (phoenix dactylifera L.) of Hajar valley areas . This valley is characterized by the growing date palm trees, which in turn contributes to food security in Hadhramout, and creates jobs to as many agricultural workers as possible, in addition to the importance of palm cultivation in community development. Field visits continued for 10 months during the agricultural season from November 2016 to August 2017. The results showed that the Scotri dates is considered the dominant cultivar, and it is propagated using offshoots only. The measurements of the phenotypic characteristics fall …

A Comparative Study Of Vegetation In Madar And Shohouh Valleys In Hadhramout, Salem Saeed Bacwud, Mohammed Saeed Khanbash, Salem Mohammed Bin Salman

Hadhramout University Journal of Natural & Applied Sciences

Bee rangeland plants are the basic sector of successful bee projects because they possess a verified range of species whose flowers contain nectar and pollen grains used in bee feeding. The study is conducted in Madar valley and Shohouh valley in Hadhramout valley. The objectives of the study are to compare bee plant species scattered in the two valleys. The survey of plants was carried out in February and March 2017 using systematic sampling plots collection. The plant survey recorded 22 families, 42 genera and 48 species in Madar valley as well as recording 25 families, 42 genera and 52 …

The Coppices Length Growth Of Ziziphus Spina Christi ( L.) Willd. And Their Stems Diameters Accumulation Growth In Irrigated Areas At Wadi Shohouh - Hdhramaut, Ahmed Salem Bataher

Hadhramout University Journal of Natural & Applied Sciences

Wadi Shohouh is located in main Wadi Hadhramaut as one of the tributary wadies Linked with the southern plateau. Attention has been paid by the Yemeni farmers to the multipurpose trees and shrubs that he agrees this agrofrestry tree or shrub of Ziizyphus trees in Wadi Shohouh to be one of the components of his farming system. Five farms of Ziizyphus trees in Wadi Shohouh, irrigated by wells water, have been selected. After felling trees height and stem diameter coppices for six years have been recorded, then static analysis has been computed. It is found that coppice height was high …

Study Of The Vegetation Cover Along The Coastal Area Of Al Rayyan-Mayfa Hadramout-Yemen, Khaled Saleh Bawahadi, Salah Adellah Ben Fraijan, Abdulkarim Saber Ali

Hadhramout University Journal of Natural & Applied Sciences

A survey was conducted along the coast dividing it into several segments and a distance estimated at .1.121 km from region to region where Sheher Reedah district is the study area characterized with solid earth nature and dry weather. Therefore the vegetation in the study area is weak and most of the plant species are saline, 95 vegetable types have been identified as belonging to 90 genus and comprise 40 species. The results showed that vegetation more prevalent species Aerva javanica with 100% ،37.2% density as for the frequency of plant desert palms Digera muricata ،Agave sislana ،Jatropha spinosa are …

Economic Contribution Of Agriculture And Food To Arkansas’ Gross Domestic Product 1997-2020, Leah English, Jennie Popp, Wayne Miller

AAES Research Reports and Research Bulletins

Agricultural production, processing, and retail industries are major contributors to Arkansas’ GDP. Agriculture contributes to the state economy through direct agricultural production, value-added processing, and agricultural retail activities. The Agriculture and Food Sector, which is comprised of agricultural production, processing, and retail industries, promotes economic strength through various interactions with other industries. The use of non-agricultural goods and services as inputs into the agricultural sector promotes diversified growth in Arkansas’ economy and thus plays a vital role in maintaining economic stability throughout the state. This report 1) compares the relative size of the Agriculture and Food Sector in Arkansas with …

University Research On Winter Growing Of Container-Grown Strawberries Translates To Grower's Farm Trial, Stacy A. Adams, Ellen T. Paparozzi, Ryan Pekarek, Dave P. Lambe, George Meyer, M. Elizabeth Conley, Paul Read

Department of Agronomy and Horticulture: Faculty Publications

Strawberries are only seasonally available in Nebraska (NE). If an affordable heated structure can be designed, then opportunity exists to increase on-farm income by producing strawberries off-season during high-value market periods. A series of university greenhouse trials were conducted from 2010 to 2012. The varieties Evie-2 and Seascape were identified as being most productive under a low technology growing scheme. A new research project, which ran from fall to late spring (2013–2014), was designed to determine if this production scheme would translate to a commercial grower. Varieties Seascape and Evie-2 (each at two grades indicated by +) and San Andreas …

Comparison Of Three Different Woody Plant Species For Their Ability To Utilize Nutritional Elements Supplied In The Form Of Biosolids And Mineral Fertilizers, Fatima El-Telib Hassan

Theses

Crop production systems of the future will need to focus on recycling rather than flow- through of mineral nutrients. Much of the nutrients that leave agricultural systems with crop products eventually end up in household waste and sewage. Returning nutrientrich products from wastewater treatment to agricultural soils must be done in an environmentally sound and culturally acceptable manner. More than 300,000 hectares of forest have been planted in the United Arab Emirates (UAE), consisting mainly of native species, such as Prosopis cineraria (Ghāf) and Vachellia tortilis (Samr). It has been proposed that sewage sludge, the dry residue from wastewater treatment, …

Growing Faba Beans On The South Coast Of Western Australia, Sarah Belli, Carla Milazzo, Emma Pearse, King Yin Lui, Grace Williams, Jeremy Lemon

Grain and other field crops published reports

Editors: Megan Abrahams, Andrew Blake and Vanessa Stewart (DPIRD)

Foreword

Thirty-three years ago I started work in Esperance on broadleaf crops. One of the best things my boss set up for me was arranging visits with several lupin farmers so I could follow their crops from seeding, through the growing season, to harvest. It was a great way to quickly get an idea of the choices farmers make and the reasons why.

With today’s busy lives, most farmers would be hard pressed to have the luxury of visiting many other farmers multiple times to learn how to grow a crop. …

Prediction Of Dry Matter Intake Based On Ruminal Degradation From Milking Cows Grazing Coast-Cross Grass, T. T. Berchielli, J. P. G. Soares, L. J. M. Aroeira, C. L. Furlan, A. K. D. Salman, R. N. Da Silveira, E. B. Malheiros

IGC Proceedings (1977-2023)

Dry matter intake (DMI) of coast-cross grazing by crossbred Holstein-Zebu and Zebu lactating cows was calculated using in vitro dry matter digestibility from extrusa (four esophageal fistulated cows) and fecal output estimate with mordent chromium. Pasture was rotationally grazed with three days grazing period and 27 days resting period, adopting a stocking rate of 1.6 and 3.2 cows/ha, during the dry and rainy season respectively. Voluntary DMI was estimated from degradation characteristics using different equations. Predicted coast-cross DMI varied with models. The prediction of tropical forages dry matter intake from equations based in ruminal degradation parameters needs further investigation before …

Forage Quality, Yield And Palatability Of Quackgrass (Elytrigia Repens (L.) Nevski), T. Yagi, R. Meguro, E. Fukuda

IGC Proceedings (1977-2023)

Quackgrass (Elytrigia repens (L.) Nevski) is a competitive perennial invader of pastures and hay meadows which is frequently harvested as forage in mixtures with desired forage species. Field experiments were conducted to compare quackgrass with cool-season perennial grasses grown under the same soil and climatic conditions, in terms of forage quality, productivity, and palatability. The forage quality of the hays was influenced by the grass species. Quackgrass showed forage crude protein (CP) concentration that was equal to those of perennial ryegrass (Lolium perenne), reed canarygrass (Phalaris arundinacea) and Kentucky bluegrass (Poa pratensis), and …

In Vitro Gas Production Technique To Predict Dmd Of Ensiled Forage Ruminant Based Diets, M. Wawrzkiewicz, J. L. Danelón, G. Jaurena

IGC Proceedings (1977-2023)

The in vitro gas production technique was used as a tool to develop an improved prediction model of dry matter digestibility of ensiled forage based diets. Eleven diets were tested through conventional experiments of in vivo dry matter digestibility (DMD). The same diets were evaluated by the in vitro gas production technique using a gas pressure transducer . The parameters of the model y = A - B Q^t Z^√t were calculated with data from the accumulated gas curves, i.e. y=cumulative gas production (ml), Q=e^-b, Z=e^-c, B=e^bT+c√T , being …