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Journal articles on the topic 'Crop species'

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1

Dempewolf, H., P. Bordoni, L. H. Rieseberg, and J. M. M. Engels. "Food Security: Crop Species Diversity." Science 328, no. 5975 (2010): 169–70. http://dx.doi.org/10.1126/science.328.5975.169-e.

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2

Disi, Onwusemu. "Understanding epigenetic effects in crop species." African Journal of Plant Science 6, no. 14 (2012): 355–63. http://dx.doi.org/10.5897/ajps11.099.

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3

Carrari, Fernando, Ewa Urbanczyk-Wochniak, Lothar Willmitzer, and Alisdair R. Fernie. "Engineering central metabolism in crop species:." Metabolic Engineering 5, no. 3 (2003): 191–200. http://dx.doi.org/10.1016/s1096-7176(03)00028-4.

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4

Jung, C. "Engineering nematode resistance in crop species." Trends in Plant Science 3, no. 7 (1998): 266–71. http://dx.doi.org/10.1016/s1360-1385(98)01247-3.

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5

., Anandkumar Patil. "CROP SPECIES IDENTIFICATION USING NN TOOL." International Journal of Research in Engineering and Technology 04, no. 17 (2015): 100–105. http://dx.doi.org/10.15623/ijret.2015.0417023.

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6

Muturi, Ephantus J., Christopher A. Dunlap, William L. Perry, and Robert L. Rhykerd. "Cover crop species influences soil fungal species richness and community structure." PLOS ONE 19, no. 9 (2024): e0308668. http://dx.doi.org/10.1371/journal.pone.0308668.

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Despite the well documented link between cover cropping and soil microbiology, the influence of specific cover crop species on soil microbes remains poorly understood. We evaluated how soil fungal communities in a no till system respond to four cover crop treatments: no cover crop (REF), cereal ryegrass (CRYE), wild pennycress (WPEN), and a mix of pea, clover, radish, and oat (PCRO). Soil samples were collected from experimental plots following termination of cover crops from depths of 0–2 cm and 2–4 cm where cover crops had significantly increased soil organic matter. There was no significant
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7

Shaposhnikov, Anton D., and Tatiana V. Matveeva. "New naturally transgenic crop." Ecological genetics 21, no. 3S (2023): 70. http://dx.doi.org/10.17816/ecogen568608.

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Horizontal gene transfer from agrobacteria to plants turned out to be a much more widespread phenomenon than previously thought. In the first it was established in 2019 due to the application of bioinformatic methods and databases, then about 30 species of naturally transgenic plants were discovered [1]. The deposition of new nucleotide sequences of various plant species makes it possible to periodically update the list of naturally GMOs. Analysis of genomic and transcriptomic databases in 2023 revealed more than 50 new naturally transgenic plants and, thus, more than 100 species of nGMOs are
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8

Terry, Norman, C. Carlson, T. K. Raab, and Adel M. Zayed. "Rates of Selenium Volatilization among Crop Species." Journal of Environmental Quality 21, no. 3 (1992): 341–44. http://dx.doi.org/10.2134/jeq1992.00472425002100030006x.

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9

Gifford, Roger M., Hans Lambers, and James I. L. Morison. "Respiration of crop species under CO2 enrichment." Physiologia Plantarum 63, no. 4 (1985): 351–56. http://dx.doi.org/10.1111/j.1399-3054.1985.tb02309.x.

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10

Esquivel-Marín, Nancy, and Julio Alegre. "Multifunctionality in neglected and underutilized crop species." Peruvian Journal of Agronomy 8, no. 1 (2024): 77–89. http://dx.doi.org/10.21704/pja.v8i1.2120.

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Neglected and underutilized crop species (NUS) are not widely grown or marketed. Certain crop types (amaranth, buckwheat, and quinoa) have advantages over commercial crops (rice, maize, and wheat). They can grow in harsh environments because of their greater resistance to abiotic and biotic stresses. Harnessing the NUS can solve global problems such as climate change, loss of agrobiodiversity, food insecurity, poverty, and unemployment in rural regions. Hence, this review investigates the various social, environmental, and economic functions associated with NUS cultivation to encourage and sup
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11

RAMIREZ-GARCIA, J., J. L. GABRIEL, M. ALONSO-AYUSO, and M. QUEMADA. "Quantitative characterization of five cover crop species." Journal of Agricultural Science 153, no. 7 (2014): 1174–85. http://dx.doi.org/10.1017/s0021859614000811.

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SUMMARYThe introduction of cover crops in the intercrop period may provide a broad range of ecosystem services derived from the multiple functions they can perform, such as erosion control, recycling of nutrients or forage source. However, the achievement of these services in a particular agrosystem is not always required at the same time or to the same degree. Thus, species selection and definition of targeted objectives is critical when growing cover crops. The goal of the current work was to describe the traits that determine the suitability of five species (barley, rye, triticale, mustard
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12

Mogale, M. M. P., N. L. Maluleke, D. C. Raimondo, et al. "Conserving the indigenous relatives of crop species." South African Journal of Botany 109 (March 2017): 352. http://dx.doi.org/10.1016/j.sajb.2017.01.117.

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13

Yamauchi, Takaki, Satoshi Shimamura, Mikio Nakazono, and Toshihiro Mochizuki. "Aerenchyma formation in crop species: A review." Field Crops Research 152 (October 2013): 8–16. http://dx.doi.org/10.1016/j.fcr.2012.12.008.

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14

Clements, Jon C., Julia Wilson, Mark W. Sweetingham, John Quealy, and Gordon Francis. "Male Sterility in three crop Lupinus species." Plant Breeding 131, no. 1 (2011): 155–63. http://dx.doi.org/10.1111/j.1439-0523.2011.01903.x.

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15

Carr, M. E. "Plant species evaluated for new crop potential." Economic Botany 39, no. 3 (1985): 336–45. http://dx.doi.org/10.1007/bf02858804.

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16

Guo, Baohong, Daolong Wang, Zhigang Guo, and William D. Beavis. "Family-based association mapping in crop species." Theoretical and Applied Genetics 126, no. 6 (2013): 1419–30. http://dx.doi.org/10.1007/s00122-013-2100-2.

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17

Albert, Isabelle, and David Makowski. "Ranking crop species using mixed treatment comparisons." Research Synthesis Methods 10, no. 3 (2018): 343–59. http://dx.doi.org/10.1002/jrsm.1328.

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18

Pronozin, A. Yu, M. K. Bragina, and E. A. Salina. "Crop pangenomes." Vavilov Journal of Genetics and Breeding 25, no. 1 (2021): 57–63. http://dx.doi.org/10.18699/vj21.007.

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Progress in genome sequencing, assembly and analysis allows for a deeper study of agricultural plants’ chromosome structures, gene identif ication and annotation. The published genomes of agricultural plants proved to be a valuable tool for studing gene functions and for marker-assisted and genomic selection. However, large structural genome changes, including gene copy number variations (CNVs) and gene presence/absence variations (PAVs), prevail in crops. These genomic variations play an important role in the functional set of genes and the gene composition in individuals of the same species
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19

Rimbing, S. C. "KEANEKARAGAMAN JENIS SERANGGA HAMA PASCA PANEN PADA BEBERAPA MAKANAN TERNAK DI KABUPATEN BOLAANG MONGONDOW." ZOOTEC 35, no. 1 (2015): 164. http://dx.doi.org/10.35792/zot.35.1.2015.7225.

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INSECT PEST SPECIES DIVERSITY POST CROP AT SOME LIVESTOCK FOODS IN SUB-PROVINCE BOLAANG MONGONDOW. The purpose of research aim to be to know species diversity and abudance of population of pest post at livestock food. To get data about pest type post crop at livestock food is done by livestock food sampling counted 1 kg, then is looked after during 10 days in laboratorium, and activity hereinafter is done abservatiion about pest type post crop at each livestock food. Insect pest type found at livestock food is identified based on insect morphology. Livestock food type taken at palce of storage
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20

Grauke, L. J., Bruce W. Wood, and Marvin K. Harris. "Crop Vulnerability: Carya." HortScience 51, no. 6 (2016): 653–63. http://dx.doi.org/10.21273/hortsci.51.6.653.

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Long-established native tree populations reflect local adaptations. Representation of diverse populations in accessible ex situ collections that link information on phenotypic expression to information on spatial and temporal origination is the most efficient means of preserving and exploring genetic diversity, which is the foundation of breeding and crop improvement. Throughout North America, sympatric Carya species sharing the same ploidy level tend to hybridize, permitting gene flow that contributes to regional diversity and adaptation. The topographic isolation of many fragmented populatio
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21

Stiehl, Barbara, and Bernard B. Bible. "Reaction of Crop Species to Thiocyanate Ion Toxicity." HortScience 24, no. 1 (1989): 99–101. http://dx.doi.org/10.21273/hortsci.24.1.99.

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Abstract Little evidence is available concerning possible allelopathic effects of the thiocyanate ion (SCN-), a known toxin commonly found in plants of the Brassicaceae (crucifers). Seeds and seedlings of 39 species of crop plants were exposed to ionic thiocyanate (0.5 mM SCN- supplied as KSCN) to determine their relative sensitivity. Percent germination was unaffected by SCN- for all the species tested. Thiocyanate ion inhibited the total seedling (shoot and root) extension of 46% of the species tested, with 38% of the species showing inhibition of shoot and 49% showing inhibition of root ext
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22

Tel Zur. "Vine cacti (Hylocereus species): an emerging fruit crop." Italus Hortus, no. 24 (2018): 19–24. http://dx.doi.org/10.26353/j.itahort/2017.2.1924.

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23

Akagi, Takashi, Katharina Jung, Kanae Masuda, and Kentaro K. Shimizu. "Polyploidy before and after domestication of crop species." Current Opinion in Plant Biology 69 (October 2022): 102255. http://dx.doi.org/10.1016/j.pbi.2022.102255.

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24

Zobel, Richard W. "Fine roots - functional definition expanded to crop species?" New Phytologist 212, no. 2 (2016): 310–12. http://dx.doi.org/10.1111/nph.14099.

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25

Carciochi, Walter D., Achim Dobermann, Nicolas Cafaro La Menza, et al. "Quantifying potassium requirement and removal across crop species." Field Crops Research 322 (March 2025): 109717. https://doi.org/10.1016/j.fcr.2024.109717.

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26

Abbas, Hamed K., and C. D. Boyette. "Phytotoxicity of Fumonisin B1on Weed and Crop Species." Weed Technology 6, no. 3 (1992): 548–52. http://dx.doi.org/10.1017/s0890037x00035776.

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Fumonisin B1(FB1) sprayed on intact jimsonweed plants at 10 to 200 μg ml–1caused chlorosis and necrosis on three- to four-leaf plants and reduced their height and biomass. Excised leaves of jimsonweed were necrotic on both surfaces after treatment with FB1at 10 to 200 μg ml–1. The degree of damage increased with the concentration of FB1. The minimum amount of FB1that damaged excised leaves was 0.05 μg. The symptoms of toxicity on sensitive plants varied with concentration of FB1. Symptoms observed included: chlorosis (creeping cucumber), necrosis (jimsonweed and common sunflower), black leaf l
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27

Fehr, Walter R., and JAMES R. JUSTIN. "Principles of Cultivar Development, vol. 2, Crop Species." Soil Science 145, no. 5 (1988): 390. http://dx.doi.org/10.1097/00010694-198805000-00013.

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28

Bryant, John A. "Successful genetic engineering of a cereal crop species." Trends in Biotechnology 5, no. 3 (1987): 60–61. http://dx.doi.org/10.1016/s0167-7799(87)80011-2.

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29

Hammer, Karl, and Korous Khoshbakht. "Towards a ‘red list’ for crop plant species." Genetic Resources and Crop Evolution 52, no. 3 (2005): 249–65. http://dx.doi.org/10.1007/s10722-004-7550-6.

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30

Macfadyen, Sarina, and David A. Bohan. "Crop domestication and the disruption of species interactions." Basic and Applied Ecology 11, no. 2 (2010): 116–25. http://dx.doi.org/10.1016/j.baae.2009.11.008.

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31

Barabaschi, Delfina, Davide Guerra, Katia Lacrima, et al. "Emerging Knowledge from Genome Sequencing of Crop Species." Molecular Biotechnology 50, no. 3 (2011): 250–66. http://dx.doi.org/10.1007/s12033-011-9443-1.

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32

Cui, Liwei, Xinbin Feng, Che-Jen Lin, et al. "Accumulation and translocation of198Hg in four crop species." Environmental Toxicology and Chemistry 33, no. 2 (2014): 334–40. http://dx.doi.org/10.1002/etc.2443.

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33

Bosland, Paul W. "Chiles: A Diverse Crop." HortTechnology 2, no. 1 (1992): 6–10. http://dx.doi.org/10.21273/horttech.2.1.6.

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Capsicum, a New World genus, has a richness in diversity that has not received much attention. Along with tomato and potato, chile is one of the important New World crops belonging to the Solanaceae family. The Capsicum fruits are popular and used in cuisines from all over the world. There are many different cultivars, forms, and uses of Capsicum. Most cultivars grown in the United States belong to one species, Capsicum annuum. The species is divided into groups based on fruit shape, flavor, and culinary use. Unfortunately, there is confusion about the names associated with the various fruit t
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34

Kharel, Tulsi P., Ammar B. Bhandari, Partson Mubvumba, Heather L. Tyler, Reginald S. Fletcher, and Krishna N. Reddy. "Mixed-Species Cover Crop Biomass Estimation Using Planet Imagery." Sensors 23, no. 3 (2023): 1541. http://dx.doi.org/10.3390/s23031541.

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Cover crop biomass is helpful for weed and pest control, soil erosion control, nutrient recycling, and overall soil health and crop productivity improvement. These benefits may vary based on cover crop species and their biomass. There is growing interest in the agricultural sector of using remotely sensed imagery to estimate cover crop biomass. Four small plot study sites located at the United States Department of Agriculture Agricultural Research Service, Crop Production Systems Research Unit farm, Stoneville, MS with different cereals, legumes, and their mixture as fall-seeded cover crops we
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35

Ogazie, Chinedum A., Edache B. Ochekwu, and Ikechukwu O. Agbagwa. "The influence of climate change on rural community food crops production pattern in high humid rainforest agroecology in the southern part of Nigeria." Advanced Journal of Plant Biology 3, no. 2 (2022): 23–30. http://dx.doi.org/10.31248/ajpb2022.022.

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This study investigates the impact of climate change on the crop production pattern of the rural community in the southern part of Nigeria. The crop production pattern identified from the survey was multicropping of two or more crop species on the same piece of arable farmland. It was carried out to evaluate the crop species associated with adopted multicropping practice by the community in the face of climate change and classified into foodstuff forms and dietary requirements. Data was collected in wet and dry seasons through a reconnaissance survey of walk-through diagonally and on-the-spot
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36

Tóth, P., E. Hrudová, E. Sapáková, E. Závadská, and M. Seidenglanz. "Species of the genus Meligethes occurring in oil-seed crop fields in the Czech Republic." Plant Protection Science 49, No. 4 (2013): 177–86. http://dx.doi.org/10.17221/3/2013-pps.

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Identification of Meligethes species and their frequencies in adult samples collected at different localities in Central and South Moravia (Czech Republic, 2009–2011) was based on comparisons of morphometric and colour characters and on differences in male and female genitalia. M. aeneus, M. viridescens, M. subaeneus, M. atratus, and M. coracinus were recorded throughout the observation period, while M. nigrescens was recorded just in 2009 and 2011, M. carinulatus and M. maurus in 2010 and 2011. M. aeneus was the most frequent species of all compared samples (2009–2011). Of
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37

Whalen, S. C., S. A. Leathe, and R. W. Gregory. "Phytoplankton primary production, standing crop and species succession in the Tongue River Reservoir, Montana." Archiv für Hydrobiologie 104, no. 4 (1985): 493–511. http://dx.doi.org/10.1127/archiv-hydrobiol/104/1985/493.

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38

Schmutz, Anja, and Christian Schöb. "Predicted mean soil depth of water uptake differs among crop species but does not change with increased crop diversity." Aspect of Applied Biology 146 (February 22, 2021): 169–74. https://doi.org/10.5281/zenodo.4785044.

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Water is a limiting resource in crop production and with the prediction that drought events increase in frequency and severity, drought-resilient crop production is one major challenge to ensure food security. Intercropping of different crop species, which show differences in hydrological niches, is one solution to reduce competition for water. In this study, the soil depth of water uptake of different crop species was investigated and how these water uptake patterns change with increasing crop diversity. Stable isotope analyses of soil and plant water was used to predict mean soil depth of wa
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39

Davidson, Campbell G. "Canadian wild plant germplasm of economic significance." Canadian Journal of Plant Science 75, no. 1 (1995): 23–32. http://dx.doi.org/10.4141/cjps95-006.

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Canada is a large country with a great diversity of native plant material. Many of the native genera and species are related to crop plants. A review of different crop groupings revealed that over 30% of native plant material is related to crop species at the generic level. Fruit crops (111 species) and forage and turfgrass (138 species) crops had the highest number of related wild species. Nut crop species had relatively few native representatives (11 species) as did cereal, oilseed and other field crops (18 species). Special and minor acreage crops were represented by 86 species while landsc
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40

Khan, Anam, Gaje Singh, Hem Singh, D. V. Singh, and Kamal Khilari. "Insect Pest Complex of Field Pea Crop." Journal of Advances in Biology & Biotechnology 27, no. 1 (2024): 87–93. http://dx.doi.org/10.9734/jabb/2024/v27i1683.

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A study on diverse insect pest complex of field pea was made in both the years of experimentation i.e. during Rabi, 2021-22 and 2022-23 at Crop Research Centre, College of Agriculture, SVPUA&T, Meerut. As many as 15 insect species were recorded during the study period which belongs to different orders viz. Orthoptera (one species), Hemiptera (four species), Lepidoptera (seven species), Isoptera (one species) and Diptera (two species). All the major parts of this legume plant viz., pod/seed, leaf, root and stem were found to be infested by the insect pests. Sucking insect pests appear durin
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41

Anderson, Randy L. "Considering canopy architecture when planning cover crop mixtures." Renewable Agriculture and Food Systems 32, no. 2 (2016): 109–11. http://dx.doi.org/10.1017/s1742170515000538.

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AbstractProducers may be able to improve growth of cover crop mixtures by selecting species to occupy different levels (zones) in the cover crop canopy. This suggestion is based on a study where we compared four cover crop treatments, comprised of one, three, six and nine species, for biomass production. Oat, dry pea and oilseed radish were present in all multi-species mixtures. Treatments were established in August, following spring wheat harvest. Biomass was harvested 9 weeks later. The most productive treatment was the oat–dry pea–oilseed radish mixture. Species of this mixture occupied dif
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42

Szumigalski, Anthony R., and Rene C. Van Acker. "The agronomic value of annual plant diversity in crop-weed systems." Canadian Journal of Plant Science 86, no. 3 (2006): 865–74. http://dx.doi.org/10.4141/p05-074.

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Enhanced crop or cultivar diversity within annual cropping systems could provide important ecological and agronomic benefits. The agronomic effects of annual plant diversity from mixtures of crop species and barley (Hordeum vulgare L.) cultivar types were compared using richness levels of 1, 2, 5 or 10 randomly selected taxa in a greenhouse experiment. Increasing crop richness increased overall crop dry matter production, production stability (i.e., decreased CV for dry matter production) and weed suppression. These agronomic variables tended to level off after a richness of five to six crop s
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43

Moss, Cami, Martin Lukac, Francesca Harris, et al. "The effects of crop diversity and crop species on biological diversity in agricultural landscapes: a systematic review protocol." Wellcome Open Research 4 (June 26, 2019): 101. http://dx.doi.org/10.12688/wellcomeopenres.15343.1.

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Agricultural intensification is a well-known driver of biodiversity loss. Diversity of crop production over space and time reduces land use intensity and may mitigate impacts on biodiversity while contributing to growing demand for human food and nutrition resources. Crop species are also known to have independent impacts on biodiversity. To date, reviews synthesising our knowledge of crop species and crop diversity-biodiversity links are missing. We will therefore conduct a systematic review by searching multiple agriculture, ecology and environmental science databases (e.g. Web of Science, G
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44

Hutianskyi, R., S. Popov, V. Zuza, and N. Kuzmenko. "Weediness of corn for grain crops by cultivation in the stationary crop rotation and permanent crops in the Eastern Forest Steppe of Ukraine." Karantin i zahist roslin, no. 3 (September 26, 2022): 15–19. http://dx.doi.org/10.36495/2312-0614.2022.3.15-19.

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Goal. To determine the species composition of weed plants and their dominant role, to establish the type and level of weediness of corn crops for grain grown in stationary crop rotation and monoculture in the conditions of the Eastern Forest Steppe of Ukraine.
 Methods. The research was carried out by route surveys of crops in field experiments.
 results. Аccording to the research data in 2011—2017 in corn sowing for grain found 33 types of weedy pollinators that belonged tо 17 families and contaminants were found in corn for grain crops, of which the most common were Asteraceae (9 s
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45

Somavilla, Alexandre, Karine Schoeninger, Dark Gabriela Dolzane Castro, Marcio Luiz Oliveira, and Cristiane Krug. "Diversity of wasps (Hymenoptera: Vespidae) in conventional and organic guarana (Paullinia cupana var. sorbilis) crops in the Brazilian Amazon." Sociobiology 63, no. 4 (2016): 1051. http://dx.doi.org/10.13102/sociobiology.v63i4.1178.

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Diversity of wasps (Hymenoptera: Vespidae) in conventional and organic guarana (Paullinia cupana var. sorbilis) crops in the Brazilian Amazon. The present study aimed to determine the diversity of wasp species associated with the guaraná crop and the difference in composition of species associated to organic and conventional crops, as well as among environments established in each management (adjacent forest, crop edge and guaraná crop). We collected 977 individuals and 59 species, in 23 genera of Vespidae, sixteen of Polistinae (52 species) and seven Eumeninae (seven species). Polybia was the
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46

Andersson, Torsten N., and Per Milberg. "Weed flora and the relative importance of site, crop, crop rotation, and nitrogen." Weed Science 46, no. 1 (1998): 30–38. http://dx.doi.org/10.1017/s0043174500090135.

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Weed species composition and density were recorded in three identical field experiments established 26 to 30 yr ago in southern Sweden. Each experiment compared three 6-yr crop rotations and four rates of nitrogen application. The rotations differed by having (1) a 2-yr rotational grassland, (2) a 2-yr mixed rotational grassland (legume/grass), or (3) spring wheat followed by fallow. Other crops in the rotations were winter turnip rape, winter wheat, spring oats, and spring barley. Using multivariate analyses, the relative importance of site, crop, crop rotation, and nitrogen application rate
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47

Sourdille, Pierre, and Pierre Devaux. "Crop Improvement: Now and Beyond." Biology 10, no. 5 (2021): 421. http://dx.doi.org/10.3390/biology10050421.

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48

Rector, Lucas S., Kara B. Pittman, Shawn C. Beam, et al. "Herbicide carryover to various fall-planted cover crop species." Weed Technology 34, no. 1 (2019): 25–34. http://dx.doi.org/10.1017/wet.2019.79.

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AbstractResidual herbicides applied to summer cash crops have the potential to injure subsequent winter annual cover crops, yet little information is available to guide growers’ choices. Field studies were conducted in 2016 and 2017 in Blacksburg and Suffolk, Virginia, to determine carryover of 30 herbicides commonly used in corn, soybean, or cotton on wheat, barley, cereal rye, oats, annual ryegrass, forage radish, Austrian winter pea, crimson clover, hairy vetch, and rapeseed cover crops. Herbicides were applied to bare ground either 14 wk before cover crop planting for a PRE timing or 10 wk
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49

Villa, Tania Carolina Camacho, Nigel Maxted, Maria Scholten, and Brian Ford-Lloyd. "Defining and identifying crop landraces." Plant Genetic Resources 3, no. 3 (2005): 373–84. http://dx.doi.org/10.1079/pgr200591.

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Awareness of the need for biodiversity conservation is now universally accepted, but most often recent conservation activities have focused on wild species. Crop species and the diversity between and within them has significant socioeconomic as well as heritage value. The bulk of genetic diversity in domesticated species is located in traditional varieties maintained by traditional farming systems. These traditional varieties, commonly referred to as landraces, are severely threatened by genetic extinction primarily due to their replacement by modern genetically uniform varieties. The conserva
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Smith, Richard G., Nicholas D. Warren, and Stéphane Cordeau. "Are cover crop mixtures better at suppressing weeds than cover crop monocultures?" Weed Science 68, no. 2 (2020): 186–94. http://dx.doi.org/10.1017/wsc.2020.12.

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Abstract:
AbstractCover crops are increasingly being used for weed management, and planting them as diverse mixtures has become an increasingly popular strategy for their implementation. While ecological theory suggests that cover crop mixtures should be more weed suppressive than cover crop monocultures, few experiments have explicitly tested this for more than a single temporal niche. We assessed the effects of cover crop mixtures (5- or 6-species and 14-species mixtures) and monocultures on weed abundance (weed biomass) and weed suppression at the time of cover crop termination. Separate experiments
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