Agroecological characteristics of spring barley cultivars, 1: Effect of preceding crops and plant spacing [NPK]

agricultural chemicals agronomic characters barley cantidad de semilla requerida cebada cereales cereals condiciones ambientales condition de milieu cropping patterns crops cultivar cultivars cultivation cultivo cultivos cultivos de grano economic plants engrais engrais npk ensemencement environment environmental conditions environnement espacement espaciamiento fertilizantes npk fertilizers grain crops medio ambiente methode methods mode de culture npk fertilizers orge plantas plante plante de culture plants pratique culturale productividad productivity produit agrochimique profitability rendement rendimiento rentabilidad rotational cropping seeding rates siembra sowing spacing yields