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.


03 Apr 2009

Trigo 2008/09 en la Red de Nutricion de CREA Sur de Santa Fe - Wheat 2008/09 in the Nutrition Network CREA Southern Santa Fe

Report of 2008/09 wheat field experiments of the Nutrition Network of CREA Southern Santa Fe

On 2008/09, four experiments of the Nutrition Network CREA Southern Santa Fe were under wheat. Results indicated that:
  • Residual effects of previous fertilizations were observed for nitrate-N, Bray 1 P, and sulfate-S
  • After 8 yeras of experimentation, the Check plots show the depletion of soil N, P, and S reserves; reaching only 64% of the wheat yeild of the NPS treatment.
  • Wheat yields in 2008 were greatly affected by the severe drought that affected the region, and also by freezing on jointing stages.
  • Significant responses were to P and NPS at La Blanca, to NS and NP at La Hansa, and to PS and NP at Lambaré.
  • Water use efficiency (WUE) increased when N, P and/or S defeiciencies were eliminated, averages of 4.9 kg/mm for the Check and 7.3 kg/mm for the NPS treatment.
  • Considering 22 of the 31 sites of the six wheat seasons evaluated, a significant relationship between wheat yield and soil nitrate-N + fertilizer n at planting was established. Wheat yields of 4000 kg/ha might be reached with soil N availability of 130-140 kg N/ha.
  • P responses are highly probable at sites with soil Bray 1 P lower than 15 ppm, and no responses were observed at sites where soil Bray 1 P was greater than 20 ppm.
  • S responses were not related to soil sulfate-S availability.

    To see the full 2008 Wheat Report, please click here,
    Para ver el informe completo, por favor haga click aqui, Info CREA Trigo 2008.pdf