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Research Papers: New Survey Technologies AllCurrent 17 Record(s): A study of crop yield estimation model based on remote sensing information and crop photosynthesis Vol.15(2000), No.2 A STUDY ON DENSITY OPTIMUM CONTROL DURING STAND MANAGEMENT FOR PLANTATION Vol.13(1998), No.2 An analysis of eco-environmental quality conditions of China's land resources Vol.14(1999), No.1 AN ANALYSIS OF EFFECTS OF ARTIFICIAL NEURAL NETWORK STRUCTURES ON PRECISION OF STREAM FLOW FORECASTING Vol.13(1998), No.2 APPLICATION AND ASSESSMENT OF RESOURCES-SAVING AGROTECHNIQUES IN THE SEMIARID LOESSAL HILLY AND GULLY REGIONS OF DINGXI Vol.13(1998), No.3 CROP PHOTO-TEMPERATURE PRODUCTIVITY MODEL AND NUMERICAL ANALYSIS OF SUITABLE GROWTH SEASON OF RICE IN SOUTHERN CHINA Vol.14(1999), No.2 Discussion on cellar disposition model of cellar irrigated agriculture and it's high efficient utilization Vol.15(2000), No.2 Effect of harvesting and cleaning on nutrition in Chinese fir plantation Vol.15(2000), No.2 GREEN GDP ACCOUNTING Vol.13(1998), No.4 INSTITUTIONAL IMPACT ON THE EXTENSION PROCESS OF AGROª²TECHNOLOGY Vol.13(1998), No.4 Modification of the basic parameters in FAO productivity model Vol.16(2001), No.3 Progrssion of RS-ecometrics Vol.14(1999), No.4 Researth into technological system for dynamic monitoring county-level landuse:taking jiaoqu county of BaoTou as an example Vol.14(1999), No.3 Study of carbon pool management index in soils under different agroecosystems Vol.14(1999), No.3 Study on the bio-accumulations of nutrient element for artificial forest on the experimental plot in QianYanZhou Vol.14(1999), No.1 The consolidating function and economic benefit analysis of the terrace hedgerows in the hilly loess region of northwest Hebei Province Vol.15(2000), No.1 THE NUMERICAL SIMULATION OF WINTER WHEAT PHOTO-TEMPE-RATURE PRODUCTIVITY IN HUANG-HUAI-HAI REGION Vol.14(1999), No.2