Crop rotation in relation to crop protection

Umaerus, V.

doi:10.1007/bf01974491

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…to stabilize crop production in variable climate conditions (Lyon et al, 1995), restore or sustain soil nutrients (Marschener, 1990;Peoples and Craswell, 1992), and act as a break crop for pests and diseases (Umaerus, 1971;Peré z, 1999). Rotations also minimize the use of mineral fertilizers in the case of grain legumes such as chickpea and faba bean by providing fixed nitrogen for the following crop (Biederbeck et al, 1998).…”

mentioning

confidence: 99%

Crop yield and water use efficiency in semi-arid region of Turkey

Çayçı

Heng

Öztürk

et al. 2009

Soil and Tillage Research

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mentioning

confidence: 99%

Crop yield and water use efficiency in semi-arid region of Turkey

Çayçı

Heng

Öztürk

et al. 2009

Soil and Tillage Research

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“…Second, the switch from a horticultural industry based on producting four processed vegetables to one based on fresh produce may have two environmental benefits. First, crop rotation is extremely important, especially for potatoes where pests can quickly build up over time to epidemic levels (Scholte, 1992;Umaerus, 1992). The reduction in the land devoted to crops like potatoes (which is still the most widely planted annual in the region) implies that farmers are using more diverse crop rotations than in the past.…”

Section: Discussionmentioning

confidence: 99%

Crop diversification and trade liberalization: Linking global trade and local management through a regional case study

Fraser

2006

Agric Hum Values

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Some models anticipate that liberalized agricultural trade will lead to increased crop diversity, while other models make the opposite claim. These positions were explored in southwestern British Columbia, Canada where, between 1992 and 1998, government subsidies and other measures designed to protect horticultural farmers were lifted, exposing these farmers to foreign competition. Public hearings on the future of agriculture provided an opportunity to tap the knowledge and experience of people affected by this transition. Analysis of transcripts from these hearings, which was confirmed by industry data, shows that trade liberalization has led to the loss of the local fruit and vegetable processing industry. Stakeholders saw the loss as a major factor affecting the choice of crops grown locally. To test this assertion, crop diversity data were analyzed, differentiating crops grown for the processing industry from those grown for the fresh market. Results show that crop diversity increased for processing crops but not for fresh crops. Farmers who used to produce commodities for the fruit and vegetable processing industry seem to have been forced to find new crops to cope with the decline in the processing industry. Here then is a case where the effects of trade were indirect (they were mediated by another variable: the loss of the processing industry) and variable (they differed for the two groups of crops). This may have significant environmental implications as scientific research shows that diverse agro-ecosystems are better able to withstand pest outbreaks and require less agri-chemicals than simple systems.

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“…All of these have the potential to negatively impact potato yields and grades. The use of crop rotation as a management tool has received considerable attention in the literature (e.g., Geels et al 1986;Scholte 1992;Umaerus 1992;and Powelson and Rowe 1993). Umareus (1992) concluded that research indicates potato diseases and pests have been successfully managed by the use of crop rotations and that short potato rotations increase contamination of the soil by certain fungi, bacteria, nematodes and insects.…”

Section: Production or Disease Riskmentioning

confidence: 99%

Optimal Crop Rotation of Idaho Potatoes

et al. 2008

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Idaho's potato growers face increasing price and production risks as the potato industry undergoes structural change. In response, producers have shortened potato crop rotation to counteract the price risk. A risk-neutral discrete stochastic sequential programming (DSSP) model was developed to analyze the affects of the shortened rotation on expected revenue with incorporated price and production risks. The results support the following conclusions: land constraints due to equipment, labor, and capital efficiency alter optimal rotations; given no land constraints, a whole farm 607.3 ha simulation yields the same results as a per-hectare analysis with Potatoes-Wheat-Wheat-Potatoes being the optimal rotation; and longer rotation cycles generate the highest expected revenue per-hectare. Additional conclusions were that the open market generates higher expected revenue when compared to contracts; producers can counteract some of the loss of expected revenues in the contracted market with lower production risk from longer rotation cycles; Idaho potato producers may not be operating at a risk-neutral level.Resumen Los productores de papa de Idaho enfrentan el aumento de los riegos del precio y de producción a medida que la industria de papa sufre cambios estructurales. En respuesta, los productores han acortado la rotación del cultivo de papa para contrarrestar el riesgo del precio. Un modelo de programación secuencial estocástica discreta (DSSP) de riesgo neutral que incorpora los riesgos de precio y producción fue desarrollado para analizar los efectos de una rotación corta sobre los ingresos esperados. Los resultados justifican las siguientes conclusiones: las limitaciones debidas al equipo, trabajo y eficiencia del capital alteran las rotaciones óptimas; cuando no hay tales limitaciones, el rendimiento total de una granja simulada de 607.3 hectáreas da los mismos resultados que el análisis por hectárea siendo la rotación óptima Papa-Trigo-Trigo-Papa; y los ciclos de rotación más largos generan los ingresos esperados por hectárea más altos. Las conclusiones adicionales fueron que el mercado libre genera los ingresos esperados más altos en comparación con los contratos; los productores pueden contrarrestar algunas pérdidas de sus ingresos esperados en el mercado pactado al tener un menor riesgo de producción cuando se usa ciclos rotación más largos; los productores de papa de Idaho pueden no estar operando a nivel de riesgo neutral.

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Crop rotation in relation to crop protection

Abstract: Crop rotation as a method to control pests and diseases is treated with respect to insects, nematodes, bacteria and fungi.

Cited by 8 publications

References 33 publications

Crop yield and water use efficiency in semi-arid region of Turkey

Crop yield and water use efficiency in semi-arid region of Turkey

Crop diversification and trade liberalization: Linking global trade and local management through a regional case study

Optimal Crop Rotation of Idaho Potatoes

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