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.


05 Apr 2006

Trigo 2005/06 en la Red de Nutricion de CREA Sur de Santa Fe / Wheat 2005/06 in the Nutrition Network CREA Southern Santa Fe

Report of 2005/06 wheat field experiments of the Nutrition Network of CREA Southern Santa Fe

On 2005/06, the nine 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. Wheat yields were very good and allowed to express potential responses to fertilization. Some locations were affected by severe frosts during tillering-jointing, but even under those circumstances, yield responses were observed.
    3. Grains per spike and grains per m2 were significantly related to grain yields.
    4. There were significant responses to N in 4 locations, P in 8 locations, to S in in three locations, and to NPS in 3 locations. No significant responses were observed to nutrients other than N, P, or S.
    5. Considering the 25 sites under wheat along the 4 seasons evaluated in the Nutrition Network, significant relationships were established between grain yileds and soil nitrate-N at sowing + fertilizer N, and the concentration of nitrates in stem sap at tillering and response to N fertilization. N availability of 100 kg/ha allowed to reach grain yields of 3600 kg/ha.
    6. A critical level of 15-20 ppm Bray 1 P was determined.
    7. Responses to S were not related to sulfate-S availability at planting.

    To see the full 2005 Wheat Report, please click here,
    Para ver el informe completo, por favor haga click aqui, Info CREA Trigo 2005.pdf

    To see photos of the wheat trials, please click here.

    Para ver fotos de los ensayos, por favor haga click aqui.