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A Market Analysis for Berry Crops in VirginiaMonson, Joseph 29 May 2008 (has links)
This thesis analyzes the potential for producers in Virginia to successfully participate in the market for berry crops, which include strawberries, blueberries, raspberries, blackberries, and other novelty berries. A survey of current berry crop producers in Virginia is used to gain insight into the supply-side of the market, and a series of personal interviews with direct market berry crop producers and buyers from retail, wholesale, and processor outlets are conducted to assess the demand-side of the market. The results show that berry crop producers in the state are diverse along many dimensions, with certain groups better positioned to serve the unsaturated demand that exists through direct outlets and others better aligned to serve the increasing demand that exists among indirect buyers. Diversification into berry crop production involves high levels of risk, but the potential returns are likewise high. / Master of Science
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Herdabilidade da massa e do teor de sólidos solúveis de amora-preta (Rubus sp.) e conservação pós-colheita / Heritability of the mass and soluble solids content of blackberry (Rubus sp.) and post-harvest conservationEinhardt, Patrícia Milech 30 August 2017 (has links)
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Previous issue date: 2017-08-30 / As estimativas dos parâmetros genéticos desempenham papel fundamental nos
programas de melhoramento, pois permitem a predição dos valores genéticos dos
candidatos à seleção, propiciando um processo mais acurado. Os objetivos do
presente estudo foram: a) avaliar a variação genética de genitores e progênies na
geração F1 e estimar a herdabilidade no sentido amplo e restrito dos caracteres de
massa média das frutas e teor de sólidos solúveis; b) caracterizar a forma das frutas
de duas cultivares e nove seleções e seus descendentes F1; e c) avaliar a
capacidade de conservação pós-colheita de frutas de sete seleções e duas
cultivares de amoreira-preta e seus índices de mercadabilidade. Os genótipos
estudados foram provenientes do Programa de Melhoramento da Embrapa Clima
Temperado. O valor médio estimado da herdabilidade no sentido amplo, para massa
da fruta (0,79) e sólidos solúveis (0,68) foi alto. Já no sentido restrito, para massa da
fruta (0,05) foi baixo e para o teor de sólidos solúveis (0,47) foi médio. Isso
demonstra que a eficiência de seleção é maior para teor de sólidos solúveis do que
para massa das frutas. Observou-se que o formato das frutas das progênies tende a
ser próximo daquele dos genitores. Na avaliação pós-colheita as seleções Black
139, 170 e 276 e as cultivares BRS Xingu e Tupy apresentaram boa conservação
após sete dias de armazenamento a 4°C, com índice de mercadabilidade acima de
85%, o que é considerado aceitável para comercialização. Foi observado também
que a cultivar BRS Xingu é similar a cultivar Tupy em firmeza e massa média das
frutas e inferior em sólidos solúveis, porém, apresentou melhor conservação póscolheita. / Estimation of genetic parameters play a key role in the improvement on breeding
programs because they allow the prediction of the genetic values of the candidates to
selection, providing a more reliable process. The objectives of the present study
were: a) to evaluate the genetic variation of parents and their F1 progenies and to
estimate heritability in the broad and restricted sense of the average fruit mass and
soluble solids content; B) characterize the fruit shape of two cultivars and nine
selections and their F1 descendants; and c) to evaluate the fruit post-harvest
conservation capacity of seven selections and two blackberry cultivars and their
indices of marketability. The genotypes studied were from the Embrapa Clima
Temperado Improvement Program. The broad sense heritability for average fruit
mass (0.79) and soluble solids (0.68) was high, whereas the restricted sense
heritability was low for fruit mass (0.05) and medium for soluble solids content (0.47).
This demonstrates that the selection efficiency is higher for soluble solids content
than for fruit mass. It was observed that the fruit format of the progenies tends to be
close to that of the parents. In the post-harvest evaluation, it was possible to
conclude that the Black 139, 170 and 276 selections and the BRS Xingu and Tupy
cultivars had good conservation after seven days of storage at 4°C, with a
marketability index above 85%, which is considered aceptable by the market. It was
also observed that the cultivar BRS Xingu is similar to Tupy cultivar in firmness and
average mass of fruits and inferior in soluble solids, however, it has a better post
harvest conservation.
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Etnoconhecimento eHábitat de Amoreiras-brancas (Rubus spp.) / Ethno-knowledge and habitat of greenberries (Rubus spp.) growing in the Southern Plateau of Santa Catarina StateWaltrich, Cibelle Couto 31 March 2014 (has links)
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Previous issue date: 2014-03-31 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Healthy and nutritive foods are more and more claimed by people. This
makes native fruits suitable to be growing by traditional and family
farmers. Greenberries of Rubus genus occur in subtropical regions and
they are frequents in the Southern Brazilian flora. Fruits of green
whiteRubus have peculiar taste that can be consumed in natura or
processed as jam, sweets or juice. The objective of this research was to
verify the presence of greenberries (Rubus spp.) in the Southern Plateau
of Santa Catarina State, to characterise the habitat, and to systematize
the ethno knowledge. The study was carry out in the municipalities of
Cerro Negro, Campo Belo do Sul, Painel, Lages e São Joaquim. Forty
three interviews were made with semi structured questioner. The
informations were concerned the occurrence, uses, and cropping the
wild greenberries. Habitats were described by 51 points sampled from
the five municipalities. Plant species inside the area of the two meter
diameter from the greenberries mother plants were identified. Results
showed that family farmers are maintainers of wild greenberriesRubus
spp. and they were willing to cultivate the specie at commercial scale.
The fruit production of wild greenberries is pointed as profitable as they
are at low cost cropping and they do not need chemicals to manage at
field conditions. The most frequent use is to consume in natura and to
make tee. The farmers stress the point that greenberries are medicinal
and nutritional fruits as well. The habitats of greenberry plants include
borders of forest and roads, field grass, and vegetation at first stage of
succession. The speciesRubus spp. can establish in degraded areas so
that it is adequate to domestication because its rusticity. Even neglected
until now, the wild greenberry can be a good economic alternative crop
for small farmers in the Southern Plateau of Santa Catarina State, BR / Alimentos nutritivos e saudáveis sãorequeridos de forma crescente pela
sociedade, abrindo espaço a frutas nativas utilizadas por povos
tradicionais e agricultores familiares. Amoreiras, frutas nativasdo gênero
Rubus,distribuem-se em regiões de clima temperadoe são
frequentemente observadasna flora sul brasileira. Frutos de amoreira
apresentam sabor peculiar, consumidosin natura, geleias, doces e sucos.
O objetivo deste trabalho foi verificar a presença de amoreiras-brancas
(Rubus spp.) no Planalto Sul Catarinense, caracterizar o hábitat e
sistematizar o etnoconhecimento. O estudo foi realizado nos municípios
de Cerro Negro, Campo Belo do Sul, Painel, Lages e São Joaquim.
Foram realizadas 43 entrevistas com questionário semi-estruturado,
levantando-se informações sobre o histórico, potencial de uso de
amoreiras-brancas e procedimentos de manejo. Para caracterização do
hábitat foi realizado levantamento assistemático em 51 pontos
amostrados nos municípios visitados. Delimitou-se dois metros de raio
da planta principal de amoreira-branca para caracterizar hábito de
crescimento e espécies associadas. O etnoconhecimento associado às
amoreiras-brancas demonstra serem os agricultores mantenedores.O uso
mais frequente é na forma de frutos frescos e para chás de todas as
partes. As amoreiras-brancas posicionam-se na parte externa de capões,
capoeirinhas, florestas e são encontradas frequentemente em campos
destinados ao pastoreio. Restabelecem-se, facilmente, em áreas
antropizadas e devido a este fator, apresenta-se como espécie vegetal
rústica com potencial de domesticação. Embora espécie seja
negligenciada, a amoreira-branca pode se constituir numa alternativa de
renda para pequenos agricultores residentes no Planalto Sul Catarinense,
cultivando-a para a produção de frutos, como planta ornamental e/ou
medicinal
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Investigation of Green Strawberry Detection Using R-CNN with Various ArchitecturesRivers, Daniel W 01 March 2022 (has links) (PDF)
Traditional image processing solutions have been applied in the past to detect and count strawberries. These methods typically involve feature extraction followed by object detection using one or more features. Some object detection problems can be ambiguous as to what features are relevant and the solutions to many problems are only fully realized when the modern approach has been applied and tested, such as deep learning.
In this work, we investigate the use of R-CNN for green strawberry detection. The object detection involves finding regions of interest (ROIs) in field images using the selective segmentation algorithm and inputting these regions into a pre-trained deep neural network (DNN) model. The convolutional neural networks VGG, MobileNet and ResNet were implemented to detect subtle differences between green strawberries and various background elements. Downscaling factors, intersection over union (IOU) thresholds and non-maxima suppression (NMS) values can be tweaked to increase recall and reduce false positives while data augmentation and negative hardminging can be used to increase the amount of input data.
The state of the art model is sufficient in locating the green strawberries with an overall model accuracy of 74%. The R-CNN model can then be used for crop yield prediction to forecast the actual red strawberry count one week in advance with a 90% accuracy.
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