Effect of Dairy Treated-Waste Application on the Penetration Resistance and Effective Stress of an Argiudoll

IMHOFF, S.

Paris

Congreso; 21ST ISTRO INTERNATIONAL CONFERENCE; 2018

ISTRO

In the central region of the Argentine Flat Pampas, soil deterioration is increasing associated with the reduction of the organic carbon content. This has negative consequences on the infiltration and movement of water and aeration capacity of the soils, as well as on the resistance to root penetration of root (RP) (Imhoff et al., 2016). As soil bulk density (Bd) increases, the contact between particles also increases, increasing the energy required to penetrate the soil. Similarly, soil drying produces an approach of its particles and favors the formation of new connections between them and between the microaggregates of the soil, which increases the energy of water retention by the soil matrix (matric potential). In these cases, RP is produced by the combined effect of water content and matric potential on the inter-particle and inter-aggregate bridges, a process known as effective stress. The application of organic waste in the soils is an alternative to increase the content of organic matter and thus, to improve its properties. In general, dairy treated-waste contains a significant amount of organic matter and nutrients, reason why they could be an important source for recovering degraded soils. It is well known that high values of RP and effective stress affect crop growth. However, there is little information about the impact that the dairy treated-waste application has on the aforementioned physical properties. The objective of the study was to determine the effect of the application of different doses of dairy treated-waste on RP and the effective stress of the soil.