|
|
|
| Registros recuperados: 14.187 | |
|
|
| van Uffelen, Ruud L.M.; de Groot, Nico S.P.. |
| Floricultural production contains a wide variety of products. The production value world wide has been rising from 11 billion to 60 billion dollars in 2003 (estimate). Europe is traditionally a large producer and trader, with a stable production value of about 10 billion dollars (2002). North America has a production value of about 6,5 billion dollars. In Asia production capacity is growing rapidly in several countries. In Africa the production has emerged enormously, but in a risky environment. Oceania is a small producer. Looking a inter- and intra... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Production; Crop Production/Industries. |
| Ano: 2005 |
URL: http://purl.umn.edu/29148 |
| |
|
|
| Ross, Kara L.; Dalton, Timothy J.; Featherstone, Allen M.. |
| The purpose of this research is to determine how technically efficient small-scale producers are in two provinces (North and South Kivu) in the Democratic of Republic (DR) of Congo at producing two different varieties of beans: bush and climbing beans. In addition to calculating the efficiency scores, this research attempts to identify what producer and field characteristics affect these scores. We hypothesize that bean producers will be more productive than producers in South Kivu and that climbing bean producers will be more productive than bush bean producers. Technical efficiency is estimated using a nonparametric approach. A tobit model is used to examine the effect of producer and field characteristic on the efficiency score. On average, farms... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Production Economics; Production Economics. |
| Ano: 2009 |
URL: http://purl.umn.edu/46575 |
| |
|
| |
|
| |
|
|
| Saad, Osama S.. |
| The coastal water off Goa is a characteristically interesting marine environment due to influence of the monsoon and upwelling. Studies on the primary productivity and related areas revealed the following results. - Water column is stratified during October and remained well mixed during November. - Hypoxic condition prevailed at the bottom during October but not in November. - Nutrients (especially Nitrate) was low during October (surface) but increased during November. High nutrients remain in bottom largely due to intense stratification during October. - Phytoplankton biomass (Chl a) average was high during October of 2.34 mgm^3 and in November it was as low as 0.62 mgm-3. - Chl a at 30m depth was as high as 1.03 mg m-3 and that of November it was 0.43... |
| Tipo: Theses and Dissertations |
Palavras-chave: Primary production. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4932 |
| |
|
|
| Calzada Estrada, A.E.; Fernández, K.; Guilarte, Y.; Rodríguez, R.; Bezanilla, A.; Casals, R.; Amboaje, Y.; Ramos, A.. |
| The work presented here is the result of applying PetroMar software, elaborated at the Marine Meteorology Centre belonging to the Institute of Meteorology of Cuba in order to perform retroanalysis and prediction of oil slick tracks at sea. Programming was executed in MatLab (version 7.0) tightly coupled to geographical feature of study region through a convenient GIS and subroutines set named BatTri, used to design the mathematical 1 dominion. This application was implemented for deep waters surrounding six prefixed coastal zones in Cuban archipelago, but it may be applied to any region in the world. Computing is made on a finite elements grid using a fourth order Runge - Kunta scheme, which offer operational advantages and an efficient integration. The... |
| Tipo: Preprint |
Palavras-chave: Oil production. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/3560 |
| |
|
| |
|
|
| Madsen, Per; Villumsen, Trine. |
| Tidligere eksperimentelle undersøgelser har vist at en øget anvendelse af grovfoder kan give anledning til en forskellig rangering af genotyper indenfor en race, dvs. at udvælgelsen af de bedste avlsdyr vil afhænge af i hvilket produktionssystem køerne skal producere. Derfor er der gennemført analyser af data fra kvægdatabasen til afklaring af om der er forskel i den indbyrdes rangering af avlsværdi for mælkeydelse, sundhed og reproduktion afhængig af om køerne står i økologiske eller konventionelle besætninger. Undersøgelsen viste ingen forskel i rangering af avlstyrene afhængig af produktionssystem, men det kan ikke udelukkes at en yderlig forskel i fodring mv. mellem de to systemer vil ændre på resultatet. |
| Tipo: Report chapter |
Palavras-chave: Production systems. |
| Ano: 2005 |
URL: http://orgprints.org/4697/1/4697.pdf |
| |
|
|
| Boelt, B.. |
| In the spring of 2002, the Danish Minister for Food, Agriculture and Fisheries initiated strategy work on the cultivation of authorised GM crops in Danish agriculture. The aim was to produce a Danish model for the co-existence of GM, conventional and organic crops in support of the free choice of consumers and to ensure development possibilities for new and existing agricultural production forms. Three groups were set up, that were assigned the task of presenting the scientific and legal problems as well as drawing up a proposal for a Danish co-existence model. These groups were the analysis group (working group), the legal group and the contact group. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems. |
| Ano: 2005 |
URL: http://orgprints.org/7995/1/7995_abstracts.pdf |
| |
|
|
| Korsgaard, Maren. |
| Frugt og bær trives godt på øerne. En vigtig årsag til dette er at nattefrost i maj kan tage pynten fuldstændigt af frugt- og bærudbytter, men den kolde oplevelse er sjælden, når man er omgivet af lunkent vand, som øboere jo er. Frugt og bær giver også trivsel til dem, der spiser dem. Indholdet af sundhedsfremmende stoffer er i frugt og bær større end i nogen anden landbrugsafgrøde, så det er produkter, vi burde spise flere af. |
| Tipo: Report chapter |
Palavras-chave: Production systems. |
| Ano: 2006 |
URL: http://orgprints.org/27560/6/27560.pdf |
| |
|
|
| Høgh-Jensen, Dr Henning; Pedersen, Morten B.. |
| A decrease in the use of fertilizers and a decrease in soil fertility direct the research focus towards the ability of the crops to adapt to low potassium conditions and to their ability to utilise sparingly soluble potassium sources. Pea (Pisum sativum), red clover (Trifolium pratense), lucerne (Medicago Sativa L.), barley (Hordium vulgare), rye (Secale cerale), perennial ryegrass (Lolium perenne L.), and oilseed rape (Brassica napus oliefera) were grown in thin layers of soils to study their root morphological plasticity and ability to utilise different potassium pools at 26 and 60 mg exchangeable K kg-1 soil. The legumes (pea, red clover, lucerne) accumulated larger amounts of nitrogen but lower amounts of potassium than rye, ryegrass, barley, and... |
| Tipo: Journal paper |
Palavras-chave: Production systems. |
| Ano: 2003 |
URL: http://orgprints.org/318/1/Morten%2D6.pdf |
| |
|
|
| Deleuran, L.C.; Gislum, R.; Boelt, B.. |
| Establishment methods have proven to be of major importance for grass seed production. The objective of this research was to test the effect of different sowing techniques on plant establishment and the subsequent seed yield. Perennial ryegrass (Lolium perenne L.) is used as the model grass due to its large importance in Danish agriculture. In a three-year trial six different methods of under-sowing of perennial ryegrass in a spring barley cover crop were employed. Perennial ryegrass was either sown directly at different depths within the spring barley (Hordeum vulgare L.) rows or placed 2, 6 or 12 cm from the spring barley rows. Results of dry matter yield indicate that the best establishment of the grass occurred when... |
| Tipo: Journal paper |
Palavras-chave: Production systems. |
| Ano: 2010 |
URL: http://orgprints.org/9066/2/9066.pdf |
| |
|
| |
|
|
| Tamm, L.. |
| Organic crop production seeks to produce high quality foods while reducing the inputs in order to promote environmental quality and conserve resources. This necessitates optimal production systems in terms of soil fertility and plant health. Studies in QLIF subproject 3 have shown that soils may gain an improved potential to release N from added amendments through adaptation of management practices. Likewise, long-term management strategies may influence suppressiveness of soils to economically important diseases. Application of manures and other organic soil fertility inputs do not pose any additional safety risk in ready-to-eat vegetables, such as head lettuce, if good farming practice... |
| Tipo: Report |
Palavras-chave: Production systems. |
| Ano: 2009 |
URL: http://orgprints.org/16590/1/16590.pdf |
| |
|
| |
|
| |
|
|
| Thorup-Kristensen, Kristian. |
| Når efterafgrøder etableres ved undersåning i korn, er det i praksis stort set altid rajgræs der anvendes. Men forsøg med forskellige efterafgrøder har vist at der kan være store fordele ved at vælge andre arter, både i miljøeffekt, i eftervirkning og i andre forhold. Vi har derfor undersøgt en række plantearter udsået som undersåede efterafgrøder i vårbyg. Flere af arterne har vist lovende egenskaber, der er bl.a. identificeret arter med markant dybere rodvækst end vi opnår med rajgræs. Farvevajd, som er en lille korsblomstret plante har vist sig velegnet til undersåning. Den er meget lovende, da den kombinerer en meget dyb rodvækst med lavt C/N forhold i biomassen og dermed en bedre eftervirkning end de fleste andre efterafgrøder. |
| Tipo: Newspaper or magazine article |
Palavras-chave: Production systems. |
| Ano: 2004 |
URL: http://orgprints.org/3885/1/3885a.rtf |
| |
|
|
| Mogensen, Lisbeth; Kristensen, Troels. |
| Forbedres grovfoderkvaliteten, via øget andel kløvergræs, stiger såvel foderoptagelsen som mælkeydelsen per ko per år og der opnås en meget positiv effekt på bedriften økonomien. Modelberegninger viser imidlertid også at kvælstofoverskud per ha i stiger dette system, med deraf øget risiko for kvælstofudvaskning. Som en konsekvens heraf er der behov for at se kritisk på den traditionelle ompløjning af græsmarkerne efter 2 til 3 år, frem for mere længerevarende marker. |
| Tipo: Report chapter |
Palavras-chave: Production systems. |
| Ano: 2005 |
URL: http://orgprints.org/4706/1/4706.pdf |
| |
|
| |
|
|
| Sundrum, Albert. |
| Das Vertrauensverhältnis zwischen Verbrauchern und Erzeugern tierischer Produkte ist gestört. Durch zurückliegende Skandalmeldungen, aber insbesondere durch die ersten BSE-Fälle in Deutschland, wurde einer breiten Bevölkerungsschicht bewusst, dass die Erzeugung von Lebensmitteln tierischen Ursprungs in vielen Aspekten nicht mit ihren Vorstellungen von Landwirtschaft übereinstimmt. Den Vertrauensverlust allein dem Fehlverhalten Einzelner oder einzelner Berufsgruppen anzulasten, wird den komplexen Strukturen der Erzeugung, des Handels und der Vermarktung sowie der Mitverantwortung der Verbraucher nicht gerecht. In der tierischen Erzeugung führt die mit der Intensivierung einhergehende Überproduktion unabhängig von der Betriebsgröße seit Jahren zu einem... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Production systems. |
| Ano: 2002 |
URL: http://orgprints.org/903/1/handbuch%2Dkein%2DDokument.pdf |
| |
| Registros recuperados: 14.187 | |
|
|
|
