PROBLEM TO BE SOLVED: To provide a fertilization map creation system, etc., in which places with good growth can accurately be known, and a fertilization map capable of knowing a fertilizing amount to be fertilized is created.SOLUTION: A fertilization map creation system includes a growth sensor 21 and a GPS device 22, and a growth information accumulation unit 31 for accumulating data. The fertilization map creation system creates a fertilization map based on growth data and position data accumulated to this growth information accumulation unit 31. The fertilization map creation system includes: a growth state calculation unit (arithmetic processing unit) 34 for making a tractor 20 travel in a field to make the position data and the growth data accumulate in the growth information accumulation unit 31, and finding a growth state of each area of the preset field based on these accumulated data; a base fertilizer amount calculation unit (arithmetic processing unit 34) for finding the base fertilizer amount of each area based on the growth state of each area; and a map creation unit 35 for creating a fertilization map showing the base fertilizer amount of each area found by the base fertilizer amount calculation unit.SELECTED DRAWING: Figure 1【課題】生育の良い場所等が正確に分かり、基肥する施肥量が分かる施肥マップを作成する施肥マップ作成システムなどを提供する。【解決手段】生育センサ21及びGPS装置22と、データを蓄積していく生育情報蓄積部31とを備え、この生育情報蓄積部31に蓄積された生育データ及び位置データに基づいて施肥マップを作成する施肥マップ作成システムであって、トラクタ20を圃場内を走行させて位置データ及び生育データを生育情報蓄積部31に蓄積させていき、この蓄積されたデータに基づいて、予め設定した圃場の各エリアの生育状態を求める生育状態演算部(演算処理部)34と、各エリアの生育状態に基づいて各エリアの基肥量を求める基肥量演算部(演算処理部34)と、基肥量演算部が求めた各エリアの基肥量を示す施肥マップを作成するマップ作成部35とを備えた。【選択図】図1