A New Design of Field Trial for Forest Management Based on Stand Characteristics Study on the Fertilizat ion-output Model of Castanea mollissima ‘Yanshanzaofeng’ in the Close Planting Garden INVESTIGATION OF OPTIMAL DESIGN ABOUT WOOD GRAB IN CENTRAL DRIVE FORM Study on soil sampling for precision agriculture-A case study from Shanghai Experimental Demonstration Base Preparation and optimization of Zhitong micro-emulsion formula The Diagnosis and optimal Design of High Efficient Ecological Economy System in Maowusu Sandy Land Reconsideration of saturated D-optimal design