Effect of seedling-topdressing of nitrogen on dry seeded rice (Oryza sativa L. ) followed by winter wheat

abonado de cobertera abonos nitrogenados analyse de tissus apport en couverture contenido de materia seca cropping systems cultivo de secano cultivos de invierno culture d'hiver culture de moyenne altitude culture multiple dry matter content multiple cropping nitrogen content nitrogen fertilizers oryza sativa plantule seedlings sistemas de cultivo teneur en azote tissue analysis triticum upland crops winter crops