Establishing a Plant Nutrition Network for the CREA Region in Southern Santa Fé

On-farm field experiments establish as a long-term network in 2000, to evaluate responses to N, P, and S in wheat, soybean, and maize in the southern Santa Fe and Southeastern Cordoba regions. Evolution of soil properties are evaluated periodically in teh different treatments.


10 May 2010

Trigo 2009/10 en la Red de Nutricion de CREA Sur de Santa Fe / Wheat 2009/10 in the Nutrition Network CREA Southern Santa Fe

Report of 2009/10 wheat field experiments of the Nutrition Network of CREA Southern Santa Fe

On 2009/10, two experiments of the Nutrition Network CREA Southern Santa Fe were under wheat. Results indicated that:
    1. Soil testing at wheat sowing showed residual fertilization effects of previous seasons on nitrate-N, Bray 1 P, and sulfates-S.
    2. After nine years of experimentation, wheat yields in the continuous Check treatment show the depletion of N, P, and S reserves, reaching only 31% of the yield obtained in the continuous NPS treayment.
    3. Grain yields were highly affected by the initial drought at Balducchi, and by frosts at tillering at both sites.
    4. Considering precipitations from June to November, average water use efficiencies were of 7.3, and 14.2 kg/ha per mm, for the treatments Check, and NPS, respectively.
    5. Average responses to N, P, S, and other nutrients was of 1342, 907, 160 and 256 kg/ha, respectively. In the two sites, there was a significant response to N, P and NP. No responses to S were observed in this season.
    6. Considering the 33 sites under wheat along the 9 seasons evaluated in the Nutrition Network, significant relationships were established between grain yields and soil nitrate-N at sowing + fertilizer N, 130-140 kg/ha allow to reach grain yields of 4000 kg/ha.
    7. A critical level of 15-20 ppm Bray 1 P was determined.
    8. Responses to S were not related to sulfate-S availability at planting.

    To see the full 2009 Wheat Report, please click here, Info CREA Trigo 2009.pdf
    Para ver el informe completo, por favor haga click aqui,

    Photos of the 2009/10 wheat experiments:

NPS Balducchi 2009 (Small).JPGNPS San Alfredo 2009 (Small).JPGTestigo Balducchi 2009 (Small).JPGTestigo San Alfredo 2009 (Small).JPG