To determine the uptake and utilization pattern of nitrogen(N),phosphorus(P),and potassium(K) in double cropping super rice,we conducted a field experiment in Changsha and Liuyang city,Hunan province,China during 2008-2010.N,P,and K uptake and utilization of super early rice Luliangyou 996 and Lingliangyou 268 and super late rice Tianyouhuazhan and Fen-gyuanyou 299 were compared among "Sanding" cultivation method(quantify the target yield,quantify the population indexes and quantify the cultivation techniques),no-tillage and seedling ...