THE RESEARCH FOR THE DEVELOPMENT OF AGRICULTURAL RECOVERY TECHNOLOGY OF STERILE LANDFILLS RESULTING FROM THE CURRENT EXPLOITATION OF LIGNITE

The research was organized on the Balta Unchiașului tailings dump, Rovinari, Gorj county, a dump covered with 30 cm of fertile soil, aiming to establish the effect of fertilization with fertilizers, cattle manure, compost, lignite –based fertilizer and liquid fertilizer based on humates extracted from lignite on sunflower production and followed the effect of fertilization with mineral fertilizers, manure, compost and liquid fertilizers based on humates extracted from lignite, on the sunflower crop). The chemical characteristics of the crop substrate had a large variability and consisted of: pH values between 8.08 and 8.35, so a slightly alkaline reaction, humus values between 2.50 -3.52%, being valued as a low-medium level of supply, the level of nitrogen total between 0.101 and 1.60%, therefore a low-medium level of supply, mobile phosphorus between 25 and 44 mg/kg, therefore a medium-high level of supply. The most high values is recorded in the variants fertilized with manure and compost, mobile potassium between 152 and 315 mg/kg, so a medium - high supply level, copper between 18 and 23 mg/kg, so normal supply values, nickel between 30 and 37 mg/kg, so an average load, lead between 7 and 12 mg/kg, values that highlight a normal level of load, manganese between 473 and 595 mg/kg, so normal values, zinc between 48 and 66 mg/ kg, showing normal values and cadmium 0.17 AND 0.32 mg/kg so normal values. The sunflower plants can be used as copper hyperaccumulators

PRODUCTIVITY AND QUALITY OF MAIZE AND SORGHUM CROPS IN CLIMATIC CONDITIONS OF IALOMITA COUNTY

Three conventional tillage methods combined with two fertilizing levels werecompared using two different maize and sorghum hybrids in terms of yields and quality yields parameters (test weight and 1000-kernel weight). Autumn plow and N120P70 fertilizing treatment determined the higher yields and quality parameters values for both maize and sorghum. Fertilizing treatment with N120P70 lead to significant yield increases with 11-19 q/ha for maize and 8 q/ha for sorghum. On three years average the best yield results were recorded by Partizan (maize hybrid) and Fundulea 21 (sorghum

EVOLUTION OF WINTER WHEAT CROP UNDER THE INFLUENCE OF AGROTEHNICAL MEASURES AND CLIMATE CHANGES

In the context of climate change, crop technologies must be updated and adapted by identifying and implementing new technological links regarding: soil tillages, the fertilization system, the previous plant, which will contribute to significantly reducing the negative impact of climate change on production and quality for wheat crop. The relationship production - quality - technology highlighted the negative influence of excessive temperatures and deficient precipitation in important stages in the evolution of plants. Wheat yield and quality are affected by management practices, climate conditions and genetic characteristics. The research was carried out in the period 2019 – 2021, in the experimental field of NARDI Fundulea and the purpose of this study was to evaluate the effect of agrotechnical measures and climatic conditions on the yield and quality of wheat. The experiment involved three different soil works and four fertilized options. Yields and quality were maximized by associated factors. Soil conservation works associated with manure fertilization increase production values and final quality by 5-10%, depending on the variant

RESEARCH ON THE SELECTIVITY AND EFFICACY OF HERBICIDES FOR CONTROLLING WEEDS FROM THE WHEAT CROP IN PEDOCLIMATE CONDITIONS FROM NARDI FUNDULEA

This paper present the results obtained at National Agricultural Research and Development Institute Fundulea, during 2021-2022, according to the new herbicide treatments: Floramix (70,8 g/kg piroxsulam + 14,2 g/kg florasulam + 70,8 g/kg cloquintocet-mexil - safener) + Dasoil 26-2 N (Adjuvant); Pallas (7.5% piroxsulam + 7.5% cloquintocet-mexil safener) + Adjuvant; Omnera + Foxtrot 69 EW (135 g/l fluroxypyr + 30 g/l thifensulfuron metil + 5 g/l metsulfuron metil 69 g/l fenoxaprop-P-etil + 34,5 g/l cloquintocet mexil - safener) și Pixxaro Super (2 g/l halauxifen-metil + 280 g/l fluroxipir meptil + 12 g/l cloquintocet-mexil), postemergently applied for the weeds controlling from the w. wheat crop. The main objective of this work focused on the study of the selectivity and effectiveness of the application of herbicide treatments to combat monocotyledonous and dicotyledonous weeds present in the wheat crop. Wheat is an important crop affected by many weeds which, fortunately, can be effectively controlled by specific applications of herbicides. The herbicides must be correlated with the infestation degree of weed, the spectrum and dominance of weeds, the time of application, the technical potential for efficacy, the local climatic conditions

Ghid tehnologic pentru culturi de acoperire

Generalități privind alegerea culturilor de acoperire Culturi de acoperire după recoltarea culturilor de toamnă Culturi de acoperire după culturile de primăvară Rotația culturilor Controlul bolilor și dăunătorilor Culturi de captare și acoperir

PRODUCTIVITY AND PROFITABILITY OF MAIZE AND SORGHUM CROPS IN NATURAL CONDITIONS FROM SOUTH AREA

Profitability is one of the most important economic parameters taken into account when it carries out an economic activity. The aim of the paper was to establishment maize and grain sorghum productivity and profitability under the influence of tillage methods on different fertilizing levels in the conditions of Ialomiţa County. Economic efficiency was evaluated using specific economic indicators (production cost, net profit and net profit rate) in terms to establish which of two crops performs better. Considering specific climatic regime sorghum showed a better tolerance than maize for water stress and high temperatures so could be further expanded in areas frequently haunted by drought. In dry years sorghum showed profit rate of 145% (Fundulea 21) comparatively with maize (127%-Partizan) in the same technological conditions. Replacing maize with sorghum is proportional to the intensity and frequent droughts in areas targeted to be cultivate

COVER CROPS FROM WINTER WHEAT, TRITICALE AND PEAS CULTIVATED IN PURE STANDS AND MIXTURES – SOIL AND WEED SUPPRESSION BENEFITS

Cover crops had shown a potential to improving carbon sequestration in soil and environmental quality, but these beneficial effects can be modulated by precipitation conditions. In this paper was evaluated the effectiveness of three cover crops on soil chemical properties and weed suppression. The experiments were performed on cambic chernozem soil from NARDI Fundulea Romania in two contrasting years regarding the amount of precipitation. Three cover crops were studied. The cover crop consisting of peas + triticale has increased more soil carbon content and infestation with weeds were lower as compared with cover crop consisting of peas or triticale. The differences concerning carbon sequestration, soil organic carbon, carbon to nitrogen ratio, weed suppression were influenced also by level of precipitations from experimental site. Cover crops were slow to impact C/N ratio of soil. In contrast, the floristic composition, and the degree of weed infestation were very significantly influenced by the composition of the cover crops. The use of cover crop mixtures offered an additional benefit to weed suppression that of individual cover crops

Actas del V Congreso ISUF-H Costa Rica 2021: Ciudades espontáneas versus ciudades planificadas: distintos retos, distintas realidades

En el año 2021 celebramos en Costa Rica la V edición del Congreso ISUF-H, los días 1, 2 y 3 de diciembre, con la Escuela de Arquitectura de la Universidad de Costa Rica como anfitriona del evento. El congreso “Ciudades espontáneas versus ciudades planificadas: distintos retos, distintas realidades” propuso como eje central una reflexión crítica sobre los procesos de urbanización planificada y urbanización espontánea, en el cual se fomente un abordaje de las ciudades como expresión de organización social, económica, ambiental y cultural, enfatizando el carácter ideológico de la urbanización y subrayando su continua construcción como resultado de construcciones complejas. La celebración de un nuevo congreso en América Latina, permitió reforzar la tradición crítica en el abordaje de las ciudades, y reforzar también la necesidad de plantear una perspectiva latinoamericana de los estudios urbanos, y por consiguiente de una teoría urbana latinoamericana. En esta ocasión el congreso se centró en ahondar en la temática de la forma urbana, desde perspectivas transversales que involucren las amplias disciplinas que asumen como objeto de discusión las problemáticas de la ciudad contemporánea y cuestionan la dicotomía planteada entre lo espontáneo y lo planificado. Para la Escuela de Arquitectura de la Universidad de Costa Rica y su Laboratorio de Ciudad y Territorio es un honor haber podido llevar a cabo esta nueva edición del congreso de la Asociación ISUF-H como segunda sede en un país latinoamericano. Relevante para fortalecer la temática de la forma urbana en la región, reforzando alianzas y estableciendo nuevas redes que permitan compartir conocimientos a partir de las experiencias de esas diversidades urbanas. Auspiciar el debate en torno a la morfología urbana y las diferencias entre esas ciudades espontáneas y las planificadas, fue una oportunidad para reunir a expertos de las distintas latitudes hispánicas.UCR::Vicerrectoría de Docencia::Ingeniería::Facultad de Ingeniería::Escuela de Arquitectur

Influence of different levels of water supply on production and economic efficiency under maize cultivated in Dobrogea region of Romania

Profitability is one of the most important economic parameters taken into account in any economic activity. The aim of the paper was to establish maize productivity and profitability of some hybrids with different precocity under several levels of water, in the conditions of Romanian Dobrogea region. Economic efficiency was evaluated using specific economic indicators (production cost, net profit and net profit rate) in order to establish which hybrids perform better. Identification, establishment and improvement of technological links to determine and maintain the achievement of high yields in order to reduce costs per hectare, we must determine as specialists, to grant a real influence of technological parameters and climatic conditions. In this study, the main technological parameters are: application of irrigation, the origin of germplasm (hybrids) and the early hybrids