Crop ecology productivity and management in agricultural systems amazonde connor david j loomis robert s cassman kenneth g fremdsprachige bucher. Crop ecology productivity and management in agricultural systems englisch taschenbuch 28 april 2011 von david j connor autor 42 von 5 sternen 6 sternebewertungen alle formate und ausgaben anzeigen andere formate und ausgaben ausblenden preis neu ab gebraucht ab kindle bitte wiederholen 3234 eur gebundenes buch bitte wiederholen 11303 eur 11303 eur taschenbuch . Crop ecology productivity and management in agricultural systems r s loomis d j connor no preview available 1992 common terms and phrases achieved activity additional agriculture allow amount animals annual applied atmosphere balance biomass canopy chapter climates concentration continue cost cover crop cultivars depends disease distribution drainage effect efficiency energy . Crop ecology productivity and management in agricultural systems david j connor robert s loomis kenneth g cassman cambridge university press apr 28 2011 nature 1 review food security and environmental conservation are two of the greatest challenges facing the world today it is predicted that food production must increase by at least 70 before 2050 to support continued