Efficacy of various levels of nitrogen and phosphorus on growth and productivity of Olympia an early pea variety (Pisum sativum L.) under Faisalabad conditions

abonos fosfatados abonos nitrogenados application rates branching caracteres de rendimiento composante de rendement crecimiento croissance crop yield dose d'application fertilisation fertilizer application floraison flowering growth nitrogen fertilizers pakistan phosphate fertilizers pisum sativum ramification rendement des cultures rendimiento de cultivos variedades varieties yield components