Soil Fertility Management for Soybean in Argentina

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VII World Soybean Research Conference Foz do Iguazu, 1-5 March 2004. Soil Fertility Management for Soybean in Argentina. Fernando O. Garca INPOFOS Cono Sur. Outline. Soybean production and nutrient availability in different regions Nitrogen management - PowerPoint PPT Presentation


  • Soil Fertility Management for Soybean in ArgentinaFernando O. GarcaINPOFOS Cono Surwww.inpofos.orgVII World Soybean Research Conference Foz do Iguazu, 1-5 March 2004

  • OutlineSoybean production and nutrient availability in different regionsNitrogen managementPhosphorus managementSulfur: The most recently deficient nutrientBalanced fertilization: Nutrient interactionsFertilization of double cropped soybean

  • Argentina: Soybean planted areaRR varietiesSoybean area increased at a rate of 577 thousand ha in the last 12 years

  • Argentina: Soybean average yieldSoybean yield increased at a rate of 49 kg/ha in the last 12 years

  • NorthcentralNo current nutrient limitationsNortheasternP and K deficienciesLow pHNorthwesternSeveral areas with low PEastern PampasP deficiencyWestern PampasLow OM, S deficiencyAreas with low PNorthern PampasS deficiencyP deficiencySouthern PampasP deficiencySoybean production regions and nutrient availability

  • Nutrient Removal and Application in Wheat, Corn, Soybean and SunflowerArgentina - Average 1996-2001 Nutrient application was 29%, 45%, less than 1%, and 9% of the N, P, K, and S extracted per year, respectively10902284751313651163.715

  • Area I : Low (< 10 ppm)Area II : Medium (10-20 ppm)Area III : Adequate (> 20 ppm)Darwich, 1980, 1993 and 1999P availability in the Pampas region

  • N managementSeed inoculation is a generalized practice for most soybean farmersBiological N fixation supplies 30-70% of the total N need (Gonzlez, 1996)Direct N fertilization at planting has not shown grain yield responsesApplications at reproductive stages (R1-R3) have shown variable results

  • Inoculation in Soybean in Fields with Soybean HistoryA. Perticari (2003), INTA CastelarMeans of 5 sites of the soybean production areas of Argentina2001/02 growing season

  • P managementSoybean response to P fertilization is widespread in deficient soils of the Pampas and the northeastern and northwestern regionsA network of 31 field experiments determined a Bray 1 P critical level of 12 mg/kg for soils of the Pampas (Daz Zorita et al., 2002)CheckP fertilized

  • Yield response to P fertilization as a function of soil Bray 1 P 31 field experiments in the provinces of Santa Fe and Buenos Aires2000/01 and 2001/02Network Proyecto INTA FertilizarSoil Bray P (mg/kg)Soybean yield response (kg/ha)

  • Recommendations of P fertilization for soybean according to soil Bray P content and yield goal (Echeverra and Garcia, 1998)

    Yield goalBray P content (mg/kg)< 44-66-88-1111-16ton/ha------------------------------ kg P/ha ------------------------------219141210-2.521171513-324201716113.52722201814429252321164.53228252419

  • Full season soybeans Averages of 6 sites Rate of 12 kg/ha of S

  • Soybean: Interaction P*SNetwork Project INTA Fertilizar (Pampean Region , 53 sites)

  • Soybean fertilization at Videla (Santa Fe) - 2002/03H. Vivas y H. Fontanetto EEA INTA Rafaela

  • Network AAPRESID-INPOFOS - 2001/02 Averages of 10 sites in the Pampean Region

  • Network Project INTA FertilizarINTA Caada de Gomez - G. Gerster et al. - 2001/02Residual effects in Double-cropped SoybeansCheck 2331 kg/haN in Wheat 2482 kg/haNP in Wheat 2544 kg/haNPS in Wheat 3098 kg/ha

  • Residual effects of NPS fertilization in the wheat for double cropped soybeans11 sites/yearsSW Santa Fe-SE CrdobaThomas et al., 20036 sites/yearsCentral Santa FeVivas & Fontanetto, 2003

  • Future researchThe role of soil organic P fractions in P supply for soybeanP management for the crop rotationThe development of fertilization recommendations for SThe evaluation of S sourcesPotential responses to secondary nutrients and micronutrients (Ca, Mg, B, Mo)Sustainability of current soybean production systems

    13% increase in yield with inoculation


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