Laya, D. <br/><br/>
A Modified parametric index to estimate yield potentials for irrigated alfalfa on soils with gypsum in Quinto (Aragon, Spain) 
D. Laya, E. Van Ranst, J. Herrero 
 - Geoderma .
<br/><br/><label>Subjects--Index Terms: </label>Espaņa Aragon Zaragoza Rio ebro Suelo de yeso Pastizales Riego