In: Cropping Systems ISBN: 978- 1 - 63485 - 888 - 5
Editor: Johanna G. Hodges © 2017 Nova Science Publishers, Inc.
Chapter 2
PHOSPHORUS DYNAMIC IN THE SOIL-PLANT
SYSTEM UNDER DIFFERENT MANAGEMENT
PRACTICES IN SEMIARID PAMPAS
Liliana Suñer 1,2,* and Juan Galantini^2
(^1) Universidad Nacional del Sur, Bahía Blanca, Argentina
(^2) Comisión de Investigaciones Científicas de la
Provincia de Buenos Aires, Buenos Aires, Argentina
ABSTRACT
In semiarid and subhumid regions diagnosis of soil fertility acquires
a relevant role, as yields are limited by the lack of water. Changes in
management practices such as fertilization, rotations and no tillage alter
the dynamic cycling of organic matter in soil and influence nutrient
availability. There is no information available about of Southwest of
Buenos Aires in Argentina on the dynamics of P in relation to
productivity. In this chapter are evaluated edaphic characteristics, like
texture and pH, the effect of tillage, crop rotations, fertilizer application
about dynamic of P forms in soil. The texture determines P reserves and
balance of its forms in soils. Available P, predominantly inorganic, is
linked to the fine fraction of the soil. The level Po is greater in the coarse
fraction of soil with a high content of fine fractions. No tillage produces a
stratification forms of P, modifies the proportion of organic forms at
different depths and changes the relationship between the organic forms- Correponding Author address; Email: [email protected].