利用机载GPS或人工携带GPS，在田间行走中随时可定位，记录位置，并记录作物长势或病虫草害的分布情况。如监测病虫草害分布，一般人为可定性分为轻、较轻、中、较重、重，以1、2、3、4、5代表。该数据的准确性很大程度上依赖于人的判断能力。近年来，由于NIR视觉技术、图象模式识别、多光谱识别技术的发展，有关苗情、杂草识别快速监测仪器不久将研制出来，并投入使用。 4) 其它数据采集
地形边缘测量，一般利用带GPS的机动车或人工携带GPS在田间边界循环行走一圈，就能将边界上的点记录下来，经过平滑形成边界图。另外，还要获取近年来轮作情况、平均产量、耕作情况、施肥情况，作物品种、化肥、农药、气候条件等有关数据。这些数据用于进行决策分析。
数据分析
一般采集的数据都是以文本表形式表示，需要利用一些数学方法进行处理，生成分布图。

1 “精细农业”技术组成
2 “精细农业”技术应用
3 远景与讨论

参 考 文 献
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C.J. Dawson. Management for spatial variability. Proceedings of the First European Conference on Precision Agriculture,Warwick University,U.K. 8~10,September 1997
Richard Earl, Paul Wheeler, Simon Blackmore, et al. Precision farming – the management of variability. Landwords, Winter 1996
Ian J Yule, Edward Crooks. Precision farming: the price of imperfection. Landwords, Winter 1996
汪懋华. “精细农业”发展与工程技术创新. 农业工程学报. 1999, 56 (1): 1~8
　
Main technique , decision-making and application of
precision agriculture in China
Liu Gang
(Research Centre for Precision Agriculture China Agricultural University
Beijing 100083)
Abstract The kernel of precision agriculture technology is the alteration of traditional farming by the information system. With the integration of geographic information system, position system, decision support system, sensing technology based on mechanization, the goal of agriculture sustainable development will come true. If this technology is put in practice, a new agriculture science and technology revolution will take place, and a important effect on agricultural development will be brought in our country. Therefore, this paper summarizes the components and applied scope of precision agriculture technology, especially on the basis of the situation of our country, some schemes to implement precision agriculture technology are taken.