4Tyas J A,Hofman P J,Steven J,Underhill R,Bell K L.Fruit canopy position and panicle bagging affects yield and quality of'Tai So' lychee.Scientia Horticulturae,1998,72:203~213
9Cheng L.,Raba R.Accumulation of macro- and micronutrients and nitrogen demand-supply relationship of ’Gala’/’Malling 26’ apple trees grown in sand culture. Journal of the American Society for Horticultural Science . 2009
10ROBINSON T.The evolution towards more competitive apple orchardsystems in the USA. Acta Horticulturae . 2008