Effect of minimum soil cultivation on grain yield and crop rotation productivity with 100 per cent of cereals [maize, wheat]

agricultura de regadio agronomic characters aradura cereales cereals cero-labranza chernozem chernozems cropping patterns cropping systems crops cultivation cultivo cultivos cultivos de grano economic plants environment environnement feed crops feed grasses genetic soil types glumiflorae grain crops gramineae gramineas graminee grasses industrial crops irrigated farming labour labranza medio ambiente methode methods mode de culture monocotyledons oil crops plantas plantas azucareras plantas feculentas plantas forrajeras plantas industriales plantas oleaginosas plante plante de culture plante industrielle plants ploughing pratique culturale productividad productivity profitability rendement rendimiento rentabilidad rotational cropping sistemas de cultivo site factors soil types starch crops sugar crops tillage travail du sol trigo trigo de invierno type de sol wheats winter wheat yields zea mays