A simple soil moisture index to forecast crop yields

Auteur(s) et Affiliation(s)

ISARD, S.A.

University of Illinois, Dept. of Geography, Urbana, Illinois 61801, Etats-Unis

Description :
Neutron probe soil moisture measurements obtained biweekly during the growing season between 1982 and 1991 from multiple depths under grass-covered plots at 17 Illinois Climate Network sites are used to forecast crop yields. A Soil Moisture Index (SMIX) that combines the effect of intensity, duration, and timing of drought or excessively wet conditions was computed by integrating the quantity of available soil moisture throughout the rooting zone over the growing season. Relationships between the SMIX values and crop yields are evaluated at county, regional, and statewide scales.

Type de document :
Article de périodique

Source :
Physical geography, issn : 0272-3646, 1995, vol. 16, n°. 6, p. 524-538, Collation : Illustration, Références bibliographiques : 19 ref.

Date :
1995

Editeur :
Pays édition : Royaume-Uni, Abingdon, Taylor and Francis

Langue :
Anglais