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J.R. Heckman

replaced annually or at least within the longer crop rotation cycle. Values for crop nutrient removal are useful for providing estimates of the amount of nutrients that must be applied to maintain soil fertility when levels have already been built up to the

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Dipak Sharma-Poudyal, Timothy C. Paulitz and Lindsey J. du Toit

other than planting resistant cultivars, e.g., appropriate crop rotations, fungicide seed treatments ( Panella and Ruppel, 1996 ), fungicide soil treatments ( Sharma-Poudyal et al., 2013c ), cultural practices ( Sharma-Poudyal et al., 2013a ), etc. Of

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George E. Boyhan and C. Randy Hill

sources of organic fertilizers Assiut J. Agr. Sci. 33 73 83 Kissel, D. 2003 Soil test handbook for Georgia Univ. of Georgia Athens Mihelic, R. Jakse, M. 2001 Nitrogen dynamics in intensive vegetable crop rotation influenced by organic fertilisation Acta

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Kiersten A. Wise, Robert A. Henson and Carl A. Bradley

different management practices is the best way to manage ascochyta blight of chickpea ( Gan et al., 2006 ). Integrated management programs include crop rotation, seed certification and testing, fungicide seed treatment, partially resistant cultivars, and

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Anthony P. Keinath

( Mycosphaerella melonis ) on cucmber fruit Plant Dis. Reptr. 52 49 51 Sitterly, W.R. 1969 Effect of crop rotation on cucumber gummy stem blight Plant Dis. Reptr. 53 417 419 Thinggaard, K. 1987 Attack of Didymella bryoniae on roots of cucumber J. Phytopathol. 120

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Timothy K. Hartz and Thomas G. Bottoms

. In a greenhouse experiment, these products were evaluated for their effects on lettuce seedling emergence, growth, and P uptake. Four soils were collected from California fields in vegetable crop rotations, chosen for their limited P availability

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Huey-Ling Lin, Jenjira Chumpookam, Ching-Chang Shiesh and Wen-Hsin Chung

practices include providing good soil drainage and good air circulation among plants, planting when temperatures are favorable for fast plant growth, avoiding application of excessive amounts of nitrate in nitrogen fertilizers, and practicing crop rotation

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Kalpana K.C. Adhikari, Mary Ruth McDonald and Bruce D. Gossen

severe. Clubroot is estimated to cause 10% to 15% loss in Brassica crops throughout the world ( Dixon, 2006 ). Management strategies to reduce clubroot severity include extended crop rotation with nonhosts ( Wallenhammar, 1996 ), liming ( Dobson and

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Cody L. Smith, Joshua H. Freeman, Nancy Kokalis-Burelle and William P. Wechter

a viable host for 15 to 20 years ( Egel and Martyn, 2007 ). Extensive survival in the absence of a host limits the efficacy of crop rotation with a nonhost crop. Multiple Meloidogyne spp. (RKNs) are capable of damaging watermelon ( Citrullus

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María Victoria Huitrón-Ramírez, Marcia Ricárdez-Salinas and Francisco Camacho-Ferre

deterioration ( Miguel, 2005 ). There are different ways to prevent the attacks of soil pathogens to plants: crop rotation, genetic improvement, and soil fumigation ( Alan et al., 2007 ; Rivero et al., 2003 ; Yetisir and Sari, 2004 ); however, each of these