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Journal articles on the topic 'Perennial crop'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Franklin, Bradley, Keith C. Knapp, and Kurt A. Schwabe. "A Dynamic Regional Model of Irrigated Perennial Crop Production." Water Economics and Policy 03, no. 01 (2017): 1650036. http://dx.doi.org/10.1142/s2382624x16500363.

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Economic analyses of regional irrigated agricultural production typically make little distinction between perennial and annual crops despite the distinctive characteristics of perennials. Such factors include high planting costs, lags in production, long lifespan, and potentially long-lasting impacts of input use and weather shocks. This study establishes a fully dynamic model of irrigated perennial crop production in a regional context where annuals are also grown. Perennial crop area is modeled as a vintage capital stock with age-dependent yields. The model is applied to the Riverland region

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2

Ferchaud, Fabien, Céline Peyrard, Joël Léonard, Eric Gréhan, and Bruno Mary. "Large Variations in N2O Fluxes from Bioenergy Crops According to Management Practices and Crop Type." Atmosphere 11, no. 6 (2020): 675. http://dx.doi.org/10.3390/atmos11060675.

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Field N2O emissions are a key point in the evaluation of the greenhouse gas benefits of bioenergy crops. The aim of this study was to investigate N2O fluxes from perennial (miscanthus and switchgrass), semi-perennial (fescue and alfalfa) and annual (sorghum and triticale) bioenergy crops and to analyze the effect of the management of perennials (nitrogen fertilization and/or harvest date). Daily N2O emissions were measured quasi-continuously during at least two years in a long-term experiment, using automated chambers, with 2–5 treatments monitored simultaneously. Cumulative N2O emissions from

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3

Kuzmenko, N. N. "Replenishment of Humus due to Crop-Root Residues in Flax and Crop Rotations." Агрохимия, no. 7 (July 1, 2023): 3–8. http://dx.doi.org/10.31857/s0002188123070074.

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In the Central region of the Non-Chernozem zone of Russia on sod-podzolic light loamy soil in a long stationary experiment in flax crop rotations, the process of replenishing humus due to crop-root residues was studied. Alternation of crops in the crop rotation in 2004–2011: pure steam – winter rye with sowing of perennial grasses (red clover and timofeevka) – perennial grasses of the 1st year of use – perennial grasses of the 2nd year of use – flax – potato – barley – oats. In 2012–2018, potatoes were excluded from the crop rotation. The contribution of cultivated crops to the accumulation of

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4

Liu, Panpan, Dong Wang, Yue Li, et al. "Crop Conversion from Annual to Perennials: An Effective Strategy to Affect Soil Multifunctionality." Agronomy 14, no. 3 (2024): 594. http://dx.doi.org/10.3390/agronomy14030594.

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Although crop conversion from annual to perennial crops has been considered as one path towards climate-smart and resource-efficient agriculture, the effects of this conversion on soil multifunctionality and biomass yields remain unclear. The objective of the study is to enhance soil multifunctionality while exerting a marginal influence on farmer income. Here, we investigated the effects of annual winter wheat (Triticum aestivum L.) and two perennial crops (a grass (Lolium perenne L.), a legume (Medicago sativa L.), and their mixture) on soil multifunctionality and biomass yield on the Yellow

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Franklin, Bradley, Kurt Schwabe, and Lucia Levers. "Perennial Crop Dynamics May Affect Long-Run Groundwater Levels." Land 10, no. 9 (2021): 971. http://dx.doi.org/10.3390/land10090971.

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During California’s severe drought from 2011 to 2017, a significant shift in irrigated area from annual to perennial crops occurred. Due to the time requirements associated with bringing perennial crops to maturity, more perennial acreage likely increases the opportunity costs of fallowing, a common drought mitigation strategy. Increases in the costs of fallowing may put additional pressure on another common “go-to” drought mitigation strategy—groundwater pumping. Yet, overdrafted groundwater systems worldwide are increasingly becoming the norm. In response to depleting aquifers, as evidenced

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Lawes, R. A., and M. J. Robertson. "Effect of subtropical perennial grass pastures on nutrients and carbon in coarse-textured soils in a Mediterranean climate." Soil Research 50, no. 7 (2012): 551. http://dx.doi.org/10.1071/sr11320.

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In the northern agricultural region of Western Australia, some farmers have integrated C4 grass pastures into their farming system. This switch away from a farming system historically dominated by annual species could alter soil nutrient and carbon (C) levels. To explore this issue, 16 ‘over-the-fence’, pair-wise comparisons were conducted between a field in an annual crop–pasture rotation and a field sown to perennial pasture. The perennial pastures were 2–8 years of age, and comprised a mix of perennial species and volunteer annuals. Soils were deep yellow sand (Tenosols), and perennial root

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Swan, A. D., M. B. Peoples, R. C. Hayes, et al. "Farmer experience with perennial pastures in the mixed farming areas of southern New South Wales: on-farm participatory research investigating pasture establishment with cover-cropping." Crop and Pasture Science 65, no. 10 (2014): 973. http://dx.doi.org/10.1071/cp13448.

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In 2009, 95 farmers in the mixed farming zone of southern New South Wales (NSW), average annual rainfall 450–700 mm, were surveyed about their use of perennial pasture species. Survey responses indicated that, on average, 52% of land was under crop, 29% contained perennial pasture and 19% annual pastures. The proportion of land sown to perennial pastures and the species used differed with rainfall. Farmers identified concerns about the cost of establishment and poor survival of perennial pasture species as constraints to wider adoption. The survey also revealed that cover-cropping (sowing past

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O'Connell, Neil V., Craig E. Kallsen, Richard L. Snyder, Blake L. Sanden, Paul W. Giboney, and Mark W. Freeman. "(464) Temperature Relationships in a Mature Orange Orchard between Areas with or without a Partial Permanent Cover Crop." HortScience 40, no. 4 (2005): 1048B—1048. http://dx.doi.org/10.21273/hortsci.40.4.1048b.

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Many citrus growers are hesitant to plant cover crops, particularly perennial types, because of possible increased frost hazard. To quantify the increased risk, temperature relations over a 3-year period were compared between areas in a `Valencia' orange orchard with and without a partial perennial cover crop. The partial perennial cover crop consisted of a mowed perennial planting along the double drip line hoses, and an annually fall-replanted unirrigated strip of groundcover in the middle between the tree rows. This partial perennial cover crop increased the frost hazard compared to unculti

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9

Hacker, Ronald B., Ian D. Toole, Gavin J. Melville, Yohannes Alemseged, and Warren J. Smith. "Managing competitive interactions to promote regeneration of native perennial grasses in semi-arid south-eastern Australia." Rangeland Journal 39, no. 1 (2017): 59. http://dx.doi.org/10.1071/rj16048.

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Treatments to reduce available soil nitrogen and achieve specified levels of weed control were evaluated for their capacity to promote regeneration of native perennial grasses in a degraded semi-arid woodland in central-western New South Wales. Treatments were factorial combinations of nitrogen-reduction levels and weed-control levels. The four levels of nitrogen reduction were no intervention, and oversowing of an unfertilised summer crop, an unfertilised winter crop or an unfertilised perennial grass. The three weed-control levels were defined by the outcome sought rather than the chemical a

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10

Šroller, J., J. Pulkrábek, D. Novák, and O. Faměra. "The effect of perennial forage crop on grain yields in submontane regions." Plant, Soil and Environment 48, No. 4 (2011): 154–58. http://dx.doi.org/10.17221/4214-pse.

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&nbsp; &nbsp; The structure of crop production (areas under crops, crop yields, fertilization) in 15 agricultural farms in potato-production and mountain regions of the Czech Republic was analyzed to evaluate the relations between NPK fertilization level, percentage of perennial forage crops on arable land and grain yields as the basic indicator of crop production output. A&nbsp;multifactor analysis based on simple regression equations indicated direct relations between the two above-mentioned factors and yield. Correlation and regression analyses demonstrated a&nbsp;close corr

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Unkovich, Murray, Kerrin Blott, Alex Knight, Ivan Mock, Abdur Rab, and Michael Portelli. "Water use, competition, and crop production in low rainfall, alley farming systems of south-eastern Australia." Australian Journal of Agricultural Research 54, no. 8 (2003): 751. http://dx.doi.org/10.1071/ar03049.

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Annual crops were grown in alleys between belts of perennial shrubs or trees over 3–4 years at 3 sites across low rainfall (<450 mm) south-eastern Australia. At the two lower rainfall sites (Pallamana and Walpeup), crop grain yields within 2–5 m of shrub belts declined significantly with time, with a reduction equivalent to 45% over 9 m in the final year of cropping. At the third, wetter site (Bridgewater), the reduction in crop grain yields adjacent to tree belts was not significant until the final year of the study (12% over 11 m) when the tree growth rates had increased. The reductions i

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Lubofsky, Evan. "The promise of perennials: Working through the challenges of perennial grain crop development." CSA News 61, no. 11 (2016): 4–7. http://dx.doi.org/10.2134/csa2016-61-11-1.

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13

Dear, B. S., J. M. Virgona, G. A. Sandral, A. D. Swan, and S. Morris. "Changes in soil mineral nitrogen, nitrogen leached, and surface pH under annual and perennial pasture species." Crop and Pasture Science 60, no. 10 (2009): 975. http://dx.doi.org/10.1071/cp09026.

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Soil mineral nitrogen (N) profiles during the growing season and changes in total soil N and available N after 3–4 years were examined under 9 different pasture swards containing annual legumes, lucerne (Medicago sativa L.), or one of 4 perennial grasses at 2 sites representative of the low and medium rainfall belt of south-eastern Australia. The effect of the presence of phalaris (Phalaris aquatica L.) or lucerne on the spatial variation in surface pH was also measured. The 9 pastures were subterranean clover (Trifolium subterraneum L.), subterranean clover with annual weeds, yellow serradell

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Tork, David G., Neil O. Anderson, Donald L. Wyse, and Kevin J. Betts. "Ideotype Selection of Perennial Flax (Linum spp.) for Herbaceous Plant Habit Traits." Agronomy 12, no. 12 (2022): 3127. http://dx.doi.org/10.3390/agronomy12123127.

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(1) Background: Annual flax (Linum usitatissimum) and many wild relatives possess showy blue flowers and finely textured foliage. To promote the use of blue-flowered flax as ornamentals, an herbaceous perennial flax breeding program was initiated to develop ideotypes and test their effectiveness. The objectives of this study were to (a) compare traits of interest for herbaceous perennials in breeding populations (CF, oilseed) and accessions of annual/perennial species in a common garden; (b) quantify the impact of selection (direct, indirect) for traits of interest; (c) identify top candidate

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Tamms, Laura, Friederike de Mol, Michael Glemnitz, and Bärbel Gerowitt. "Weed Densities in Perennial Flower Mixtures Cropped for Greater Arable Biodiversity." Agriculture 11, no. 6 (2021): 501. http://dx.doi.org/10.3390/agriculture11060501.

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The cropping of perennial wildflower mixtures to produce biomass for use in biogas plants is one option for breaking maize’s dominance as a bioenergy feedstock. The aim of this study was to investigate the development of weeds in commercially produced perennial wildflower mixtures. Weed control during the establishment of perennial wildflower mixtures is very difficult to manage and raises the issue of the development of new weed problems when cropping perennial wildflower mixtures. In a three-year field experiment with staggered starts in four sites in northeast Germany, a perennial crop mixt

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Tork, David G., Neil O. Anderson, Donald L. Wyse, and Kevin J. Betts. "Perennial Flax: A Potential Cut Flower Crop." HortScience 57, no. 2 (2022): 221–30. http://dx.doi.org/10.21273/hortsci16098-21.

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The genus Linum L. contains ≈200 primarily blue-flowered species, including several ornamentals, yet no reports exist regarding the cut flower potential of this genus. The objective of this study was to evaluate the cut flower potential of perennial flax cultivars (L. perenne L. ‘Blue Flax’ and ‘Sapphire’; Expt. 1, 2018) and accessions (L. austriacum L., L. lewisii Pursh., and L. perenne; Expt. 2, 2019), and record traits that will enable breeding and selection for improved cut flower performance. The mean vase life across both cultivars in Expt. 1 was 9.2 days. In Expt. 2, L. perenne had the

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Hmielowski, Tracy. "Napiergrass as a Dual-Use Perennial Crop." CSA News 64, no. 7 (2019): 4–5. http://dx.doi.org/10.2134/csa2019.64.0701.

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18

Reimann-Philipp, R. "Perennial Spring Rye as a Crop Alternative)." Journal of Agronomy and Crop Science 157, no. 4 (1986): 281–85. http://dx.doi.org/10.1111/j.1439-037x.1986.tb00077.x.

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Akiyama, T., and P. K. Trivedi. "Vintage production approach to perennial crop supply." Journal of Econometrics 36, no. 1-2 (1987): 133–61. http://dx.doi.org/10.1016/0304-4076(87)90047-9.

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Zhang, Yan Ming, Chao Tian, Lu Ming Jiang, Yong Peng Li, Zhi Min Xiao, and Ji Lin Li. "Advantages of Perennial Crop on Conservation of Agroecological Environment." Advanced Materials Research 518-523 (May 2012): 5213–16. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.5213.

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Of human activities, agriculture is perhaps the most disruptive to the functioning of ecosystems around the world. As agriculture's impact on the Earth has been amplified by industrial farming, the agroecological environment is worsening. By developing perennial crops, however, would help deal with the multiple issues involving agroecological environmental conservation and economic benefits in a world of shrinking resources. It can provide multiple ecosystem services essential for sustainable production more effectively than production systems based on annual crops, such as reducing soil erosi

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SNAPP, SIEGLINDE, PAUL ROGÉ, PATRICK OKORI, REGIS CHIKOWO, BRAD PETER, and JOSEPH MESSINA. "PERENNIAL GRAINS FOR AFRICA: POSSIBILITY OR PIPEDREAM?" Experimental Agriculture 55, no. 2 (2018): 251–72. http://dx.doi.org/10.1017/s0014479718000066.

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SUMMARYPerennial grain crops have been proposed as a transformative approach to agriculture. Replacing annual staple crops with perennialized growth types of the same crops could provide environmental services, improve labour efficiency and weather resilience, reduce seed costs and produce livestock fodder or fuelwood production. Yet, the technologies and science for agricultural development in Africa have focused almost exclusively on annuals. In this paper, we review the literature to explore what has been potentially overlooked, including missed opportunities as well as the disadvantages as

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Morillo, Eduardo, and Gérard Sécond. "Tracing the domestication of the Andean root crop arracacha (Arracacia xanthorrhizaBancr.): a molecular survey confirms the selection of a wild form apt to asexual reproduction." Plant Genetic Resources 15, no. 5 (2016): 380–87. http://dx.doi.org/10.1017/s1479262116000046.

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AbstractAndean arracacha (Arracacia xanthorrhizaBancr.) is a valuable but poorly known vegetatively reproduced root crop whose origin is still unresolved. Wild tuberous forms are present in the presumed areas of domestication and have a perennial or monocarpic life history. To elucidate the origin of the cultivated form, we surveyed a molecular analysis with amplified fragment length polymorphisms (AFLPs) in a representative sample of this crop and its wild relatives from Ecuador and Peru, the presumed areas of domestication. Wild species with tuberous and non-tuberous roots were included, as

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Hung, Duong Manh, and Bui Trinh. "Perennial Plants in Vietnam's Economy." Research in World Economy 13, no. 1 (2022): 19. http://dx.doi.org/10.5430/rwe.v13n1p19.

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Vietnam has strengths in perennial crop production due to its diverse soil, climate and crop ecosystems. Developing perennial crops is strength of our Vietnam's agriculture to serve the requirements of raw materials for the processing industry and for export. During the 36 years of renovation (1995 - 2021), perennial crop production has continuously developed comprehensively, growing rapidly both in terms of area expansion and intensive farming to increase productivity and output. In recent years, the output of most perennial crops has increased sharply, especially those associated with export

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Franco, José G., Marisol T. Berti, John H. Grabber, et al. "Ecological Intensification of Food Production by Integrating Forages." Agronomy 11, no. 12 (2021): 2580. http://dx.doi.org/10.3390/agronomy11122580.

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Forage crops have the potential to serve multiple functions, providing an ecological framework to sustainably intensify food production, i.e., ecological intensification. We review three categories of forages (annual forages, perennial forages, and dual-use perennial crops/forages) we believe hold the greatest promise for ecologically intensifying food production. Annual cover crops can provide additional forage resources while mitigating nutrient losses from agricultural fields when they are intercropped with, interseeded into, or following an annual crop, for instance. The integration of per

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Mueller-Warrant, George W., Gerald W. Whittaker, and Kristin M. Trippe. "Remote Sensing of Perennial Crop Stand Duration and Pre-Crop Identification." Agronomy Journal 108, no. 6 (2016): 2339–54. http://dx.doi.org/10.2134/agronj2016.03.0145.

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Roche, Erin H., Ellen B. Mallory, Thomas Molloy, and Richard J. Kersbergen. "Evaluating organic bread wheat as a rotation crop for organic dairy farms." Renewable Agriculture and Food Systems 33, no. 2 (2017): 163–78. http://dx.doi.org/10.1017/s1742170517000035.

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AbstractThe rising demand for local, organic bread wheat (Triticum aestivum L.) in the northeastern USA may be an economic and agronomic opportunity for organic dairy producers. Bread wheat must produce adequate grain yields and crude protein (CP) levels to be profitable as a food crop and must complement the on-farm production of high-quality dairy feed. A field study evaluated bread wheat and perennial forage performance in five 3-year crop sequences all ending in a perennial legume/grass forage. The sequences differed by wheat type (winter or spring) and the crop prior to wheat: (1) corn si

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DeHaan, L. R., D. L. Van Tassel, and T. S. Cox. "Perennial grain crops: A synthesis of ecology and plant breeding." Renewable Agriculture and Food Systems 20, no. 1 (2005): 5–14. http://dx.doi.org/10.1079/raf200496.

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AbstractPerennial grain crops would address many agricultural problems, including soil erosion, nutrient loss and pesticide contamination. Doubts about the possibility of perennial grain crops rest upon two assumptions: (1) that the relationship between yield and longevity is a fixed function that cannot be influenced by selection, mutation or environmental changes; and (2) that yield and longevity trade off in a bivariate manner to the exclusion of all other traits. These assumptions are consistent with the phenotypic trade-off model, but recent research suggests that a quantitative genetic m

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Tavares Filho, João, Thadeu Rodrigues de Melo, Wesley Machado, and Bruno Vieira Maciel. "Structural changes and degradation of Red Latosols under different management systems for 20 years." Revista Brasileira de Ciência do Solo 38, no. 4 (2014): 1293–303. http://dx.doi.org/10.1590/s0100-06832014000400025.

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Soils are the foundation of terrestrial ecosystems and their role in food production is fundamental, although physical degradation has been observed in recent years, caused by different cultural practices that modify structures and consequently the functioning of soils. The objective of this study was to evaluate possible structural changes and degradation in an Oxisol under different managements for 20 years: no-tillage cultivation with and without crop rotation, perennial crop and conventional tillage, plus a forested area (reference). Initially, the crop profile was described and subsequent

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Zhang, Yan Ming, Bo Jiang, Song Jin, Cun Yu Li, Yu Xin Li, and Ji Lin Li. "Perennial Crop: An Important Genetic Resource in Agroecosystems." Advanced Materials Research 726-731 (August 2013): 4091–94. http://dx.doi.org/10.4028/www.scientific.net/amr.726-731.4091.

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As agriculture's impact on the Earth has been amplified by industrial farming, the functioning of ecosystems around the world is disruptive. The phenomena of agroecological environment are becoming worse and worse in the arid and semi-arid regions, which has become the predominant obstacle for agriculture development. Through understanding the character of perennial crops and developing them, however, would help us to deal with the multiple issues in agroecosystems, such as agroecological environmental conservation, economic benefits and so on. It also can provide multiple ecosystem services i

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Beck, Paul A., Wayne Coblentz, John Jennings, and Matthew R. Beck. "198 Using Annual Forage Crops to Extend Grazing: What are the Benefits to Production and Livestock Enterprise Economics." Journal of Animal Science 100, Supplement_3 (2022): 89. http://dx.doi.org/10.1093/jas/skac247.174.

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Abstract Extending the grazing season, and thereby reducing reliance on harvested and stored forages, positively affects the economics of grazing livestock. In the Southern Great Plains and Southeastern regions of the U. S., grazing systems are dominated by warm season perennial grasses. The most famous example of using annual forages to extend the grazing season in the Southern Great Plains is the use of wheat (and other cool-season annuals) in crop fields as a forage resource during the winter and early spring in either dual purpose (grazing and grain production) or graze-out (grazing entire

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Danso-Abbeam, Gideon, Khama Mohammed Amin, and Abiodun A. Ogundeji. "Enhancing Household Welfare through Perennial Crop Production in Northern Ghana." Sustainability 15, no. 1 (2022): 451. http://dx.doi.org/10.3390/su15010451.

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As Ghana seeks to diversify its agricultural export commodity trade away from its over-reliance on cocoa, empirical evidence is critical to inform policy direction on the implementation of programs to promote such an agenda. The objective of the study was to determine whether farmers who cultivate perennial crops as their primary source of livelihood have better welfare gains than farmers who cultivate perennial crops. The study used cross-sectional data collected from 386 farming households in the northern region of Ghana. The propensity score-matching technique augmented with a control funct

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Christenson, Elizabeth, Virginia L. Jin, Marty R. Schmer, Robert B. Mitchell, and Daren D. Redfearn. "Soil Greenhouse Gas Responses to Biomass Removal in the Annual and Perennial Cropping Phases of an Integrated Crop Livestock System." Agronomy 11, no. 7 (2021): 1416. http://dx.doi.org/10.3390/agronomy11071416.

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Diversifying agronomic production systems by combining crops and livestock (i.e., Integrated Crop Livestock systems; ICL) may help mitigate the environmental impacts of intensive single-commodity production. In addition, harvesting row-crop residues and/or perennial biomass could increase the multi-functionality of ICL systems as a potential source for second-generation bioenergy feedstock. Here, we evaluated non-CO2 soil greenhouse gas (GHG) emissions from both row-crop and perennial grass phases of a field-scale model ICL system established on marginally productive, poorly drained cropland i

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Mohler, Charles L., Caroline A. Marschner, Brian A. Caldwell, and Antonio DiTommaso. "Weed Mortality Caused by Row-Crop Cultivation in Organic Corn–Soybean–Spelt Cropping Systems." Weed Technology 30, no. 3 (2016): 648–54. http://dx.doi.org/10.1614/wt-d-16-00020.1.

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To assess the effectiveness of interrow cultivation, counts were taken before and after cultivation of corn and soybean during the first two crop rotations in a corn–soybean–spelt organic grain cropping systems experiment. Overall control per cultivation event in soybean was 73%, about equal to the 67% of the interrow area actually covered by cultivator tools. Weed control per cultivation event in corn was higher, and exceeded 91% at later cultivations. The greater weed control in corn relative to soybean, particularly at later cultivations, was probably due to more soil being thrown into the

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Menalled, Uriel D., K. Ann Bybee-Finley, Richard G. Smith, Antonio DiTommaso, Sarah J. Pethybridge, and Matthew R. Ryan. "Soil-Mediated Effects on Weed-Crop Competition: Elucidating the Role of Annual and Perennial Intercrop Diversity Legacies." Agronomy 10, no. 9 (2020): 1373. http://dx.doi.org/10.3390/agronomy10091373.

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Crop diversity may mediate the intensity of weed-crop competition by altering soil nutrient availability and plant-soil microbe interactions. A greenhouse experiment was conducted to analyze weed-crop competition in soils with varying crop diversity legacies. Soil greenhouse treatments included field soils (i.e., soil nutrient and microbial legacies), a sterile greenhouse potting mix inoculated with microorganisms of the field soils (i.e., microbial legacies), and a sterile greenhouse potting mix. Soils for the greenhouse experiment were sampled and assessed after two-years of conditioning wit

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Zollinger, Richard K., and James J. Kells. "Perennial Sowthistle (Sonchus arvensis) Interference in Soybean (Glycine max) and Dry Edible Bean (Phaseolus vulgaris)." Weed Technology 7, no. 1 (1993): 52–57. http://dx.doi.org/10.1017/s0890037x00036861.

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Field experiments were conducted in 1987 and 1988 to examine interference from a natural population of perennial sowthistle on soybean and dry edible bean. In 1987, an average of 78 and 90 perennial sowthistle shoots per m2in 71-cm (wide) crop row spacing reduced soybean and dry edible bean yield by 49% and 36%, respectively. In 1988, a year of less precipitation, an average density of 96 and 88 shoots per m2reduced soybean and dry bean yield by 87% and 83%, respectively. One cultivation 5 wk after planting increased crop yield and decreased perennial sowthistle density compared with no cultiv

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Martin, Laura, Julie Wohlfahrt, Florence Le Ber, and Marc Benoît. "Perennial biomass crop cultivation and its territorial patterns." L'Espace géographique (English Edition) Volume 41, no. 2 (2013): 133–47. http://dx.doi.org/10.3917/ege.412.0133.

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Miller, Allison J., and Briana L. Gross. "From forest to field: Perennial fruit crop domestication." American Journal of Botany 98, no. 9 (2011): 1389–414. http://dx.doi.org/10.3732/ajb.1000522.

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Young, W. C., H. W. Youngberg, D. O. Chilcote, and J. M. Hart. "Spring Nitrogen Fertilization of Perennial Ryegrass Seed Crop." Journal of Production Agriculture 10, no. 2 (1997): 327–30. http://dx.doi.org/10.2134/jpa1997.0327.

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FOLD, NIELS. "Transnational Sourcing Practices in Ghana's Perennial Crop Sectors." Journal of Agrarian Change 8, no. 1 (2007): 94–122. http://dx.doi.org/10.1111/j.1471-0366.2007.00164.x.

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Dias, João Silva. "Portuguese perennial kale: a relic leafy vegetable crop." Genetic Resources and Crop Evolution 59, no. 6 (2012): 1201–6. http://dx.doi.org/10.1007/s10722-012-9835-5.

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Knapp, Keith C., and Kazim Konyar. "Perennial Crop Supply Response: A Kalman Filter Approach." American Journal of Agricultural Economics 73, no. 3 (1991): 841–49. http://dx.doi.org/10.2307/1242836.

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Johnson, Dennis V., and P. K. R. Nair. "Perennial crop-based agroforestry systems in Northeast Brazil." Agroforestry Systems 2, no. 4 (1985): 281–92. http://dx.doi.org/10.1007/bf00147039.

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Darwent, A. L., K. N. Harker, and G. W. Clayton. "Perennial sowthistle control with sequential herbicide treatments applied under minimum and zero tillage systems." Canadian Journal of Plant Science 78, no. 3 (1998): 505–11. http://dx.doi.org/10.4141/p97-093.

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Perennial sowthistle (Sonchus arvensis L.) control under minimum and zero tillage systems, and following several sequential in-crop herbicide treatments applied in a crop rotation of canola (Brassica rapa L.) followed by 3 yr of barley (Hordeum vulgare L.), was evaluated in two field experiments near Grande Prairie, Alberta. Under zero tillage, in-crop applications of clopyralid at 0.1 to 0.3 kg active ingredient (a.i.) ha−1 to canola, followed by annual in-crop applications of clopyralid at 0.15 kg a.i. ha−1 plus MCPA at 0.42 kg a.i ha−1 to barley in the next 2 yr, reduced perennial sowthistl

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Cox, C. M., K. A. Garrett, and W. W. Bockus. "Meeting the challenge of disease management in perennial grain cropping systems." Renewable Agriculture and Food Systems 20, no. 1 (2005): 15–24. http://dx.doi.org/10.1079/raf200495.

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AbstractPerennial grain production will likely present unique challenges for managing diseases that affect the productivity and longevity of crops being considered. Typical cultural practices effective at reducing soil- and residue-borne pathogens, such as annual crop rotations, delayed fall planting, and tillage, are not feasible in perennial systems. Consequently, soil- and residue-borne pathogens, and pathogens such as root colonizers and viruses that survive in live tissue, may increase in importance in a perennial grain crop. Resistance genes will undeniably be important defenses against

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Bithell, S. L., R. C. Butler, A. McKay, and M. G. Cromey. "Wheat volunteers in Lolium perenne effects on Gaeumannomyces graminis var tritici carryover and takeall." New Zealand Plant Protection 64 (January 8, 2011): 175–82. http://dx.doi.org/10.30843/nzpp.2011.64.5978.

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Crop rotations can be used to manage the buildup of inoculum of Gaeumannomyces graminis var tritici (Ggt) an important pathogen that causes takeall in wheat crops This study investigated whether the value of a perennial ryegrass (Lolium perenne) break crop is impaired by the presence of wheat volunteers Soil Ggt concentrations after perennial ryegrass without wheat volunteers were approximately 20 of those with wheat but perennial ryegrass was less effective than fallow at reducing soil Ggt Wheat volunteers reduced the value of a perennial ryegrass break when they were present at densities of

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Kuzmenko, N. N. "Effectiveness of the mineral fertilizer system with different saturation in the link of the flax crop rotation." Агрохимия, no. 8 (September 13, 2024): 37–41. http://dx.doi.org/10.31857/s0002188124080054.

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In the link of flax crop rotation (fallow land–winter rye–perennial grasses of the 1st year of use (y. u.)–perennial grasses of the 2nd y. u.–fiber flax) on sod-podzolic light loamy soil in the conditions of the Non-Chernozem zone of the Russian Federation in 2019–2023 the effectiveness of a mineral fertilizer system with different saturation of 1 ha of crop rotation was studied squares. It is shown that the highest yield of winter rye of 26.9 c/ha was obtained when applying fertilizers at a dose of N80P60K90, which corresponded to the option of applying 140 kg of active substance (a. s.) NPK/

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Ali, Muhammad, Zain ul Abdin, Rafique Chandio, and Ali Raza Zaidi. "Crop and Economical Water Productivity of Wheat at Perennial and Non-Perennial Canals in Sindh." Qlantic Journal of Social Sciences and Humanities 5, no. 2 (2024): 317–30. http://dx.doi.org/10.55737/qjssh.933349456.

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The freshwater resources are under immense pressure to provide water and food security. New climate change projections for current and future water availability suggest that farmers and policymakers must move from traditional per-acre crop yield measurement to crop and economics water productivity. This research aimed to assess wheat-crop CWP and EWP at perennial and non-perennial canals. The Nara and Rice canals were selected, and both canals were off-take at Sukkur Barrage from Indus. Two distributaries were selected from each canal with the location of the head and tail. A survey tool was d

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Boincean, Boris, and David Dent. "Soil fertility – the only possible foundation for more sustainable agriculture." BIO Web of Conferences 17 (2020): 00119. http://dx.doi.org/10.1051/bioconf/20201700119.

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The reductionist approach to intensification of agriculture has created unanticipated economic, ecological and social consequences. Across the steppes, elimination of perennial legumes from the crop rotation and even elimination of crop rotation, large areas under black fallow, and the demise of crop and animal husbandry are draining soil fertility – and in many places loss of the soil itself. Data from long-term field experiments demonstrate the importance of perennial legumes in crop rotation for nitrogen- and water-use efficiency, accumulation of soil organic matter in deeper soil layers, a

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Hellebrand, H. J., V. Scholz, and J. Kern. "Nitrogen conversion and nitrous oxide hot spots in energy crop cultivation." Research in Agricultural Engineering 54, No. 2 (2008): 58–67. http://dx.doi.org/10.17221/1001-rae.

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Since 1999, nitrous oxide (N<sub>2</sub>O) soil emissions from sites cultivated with energy plants have been measured by gas chromatography and gas flux chambers in experimental fields. The main aim of this study was the nitrogen conversion factor and its variability for sandy soils under climatic conditions of Central Europe. Annual plants (hemp, rape, rye, sorghum, triticale) and perennial plants (grass, perennial rye, poplar, willow) were fertilised with three different levels of nitrogen (150 kg N/ha/year, 75 kg N/ha/year, and none). The annual nitrogen conversion factors were

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Robertson, Michael, and Clinton Revell. "Perennial pastures in cropping systems of southern Australia: an overview of present and future research." Crop and Pasture Science 65, no. 10 (2014): 1084. http://dx.doi.org/10.1071/cp14040.

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Addressing the opportunities and challenges for integrating perennial forages and shrubs into the mixed crop–livestock farming systems of southern Australia has been the focus of the Future Farm Industries Cooperative Research Centre EverCrop project. This overview discusses the use of perennial plants in cropping landscapes in terms of the concepts of ‘rotation, separation and integration’ and highlights the contribution of papers in this special issue of Crop and Pasture Science across a range of biophysical and socioeconomic factors. Drivers for the inclusion of perennial forage plants incl

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