Comparisons of uniform and variable rate nitrogen and phosphorus fertilizer applications for grain sorghum, Transactions of the American Society of Agricultural Engineers, issue.2, pp.44-201, 2001. ,
Experimental study on the influence of variable rate fertilization on maize yield and soil nutrients, Journal of Agricultural Engineering, issue.8, pp.22-64, 2006. ,
Comparison of Uniform- and Variable-Rate Phosphorus Fertilization for Corn???Soybean Rotations, Agronomy Journal, vol.96, issue.1, pp.26-33, 2004. ,
DOI : 10.2134/agronj2004.0026
Development and performance assessment of map-based variable rate granular application system, Natural Science Edition, vol.30, issue.4, pp.338-342, 2009. ,
Prescription map identification and position lag calibration method for variable rate application of fertilizer, Transactions of the Chinese Society for Agricultural Machinery, pp.42-204, 2011. ,
Our country measuring soil fertilizer technology to increase revenue and reduce expenditure effect research?? Based on empirical analysis of jiangsu and jilin provinces, pp.2009-2053 ,
Zongjian?Xu Yan?Research and application of control system for variable rate fertilizer applicator based On CPLD, ?Transactions of the the Chinese Society of Agricultural Engineering?2010?26, pp.200-204 ,
Design of variable rate fertilizer applicator, Transactions of the Chinese Society for Agricultural Machinery, pp.36-50, 2005. ,
Xue Xuzhang?Design and experiment of variable rate fertilizer applicator, J]? Transactions of the Chinese Society of Agricultural Engineering, issue.5, pp.20-114, 2004. ,
Design of the velocity system of the valve-controlled motor on the variable rate fertilizer applicator, pp.15-47, 2003. ,
Design of control system of variable rate fertilization, pp.68-71, 2011. ,
Study on hydraulic stepless speed control system of the variable rate fertilizer applicator, 2009. ,
Positioning Method of Variable Rate Applicators in Irregular Field, Transactions of the Chinese Society for Agricultural Machinery, pp.42-158, 2011. ,
Design of control system of variable rate fertilizer applicator in precision agriculture, Transactions of the Chinese Society of Agricultural Engineering, vol.20, issue.1, pp.113-116, 2004. ,
New type of PID control and application ,
PID Control Strategy of the Variable Rate Fertilization Control System, Transactions of the Chinese Society for Agricultural Machinery, pp.41157-162, 2010. ,
Design and experiment of 2F-6-BP1 variable rate assorted fertilizer applicator, Transactions of the Chinese Society of Agricultural Engineering, vol.28, issue.4, pp.14-18, 2012. ,