CAJ | 학술논문

以英国Hillsborough农业研究所附近的一块7.9 hm2的牧草地为研究区，采用地统计的半方差分析和克立格方法研究其空间变异性和空间插值。同时对研究田块的样点根据不同间距、不同形状进行删选，对不同布局状况下的结果进行统计比较，以获取满足一定精度下的最少采样个数和采样形状。研究结果表明，单纯利用样方统计，土壤有效钾需要65个采样点，大致为原始采样点的一半。而在考虑空间采样形状和空间插值效果，再采用最小显著性差异（LSD）进行比较，该田块土壤有效钾采样最好使用规则三角网布点（样点数为62个）。
이영국Hillsborough농업연구소부근적일괴7.9 hm2적목초지위연구구，채용지통계적반방차분석화극립격방법연구기공간변이성화공간삽치。동시대연구전괴적양점근거불동간거、불동형상진행산선，대불동포국상황하적결과진행통계비교，이획취만족일정정도하적최소채양개수화채양형상。연구결과표명，단순이용양방통계，토양유효갑수요65개채양점，대치위원시채양점적일반。이재고필공간채양형상화공간삽치효과，재채용최소현저성차이（LSD）진행비교，해전괴토양유효갑채양최호사용규칙삼각망포점（양점수위62개）。
Field nutrient distribution maps obtained from the study on soil variation within fields are the basis of precision agriculture. The quality of these maps and value for management depends on the accuracy of the predicted values, which in true depends on the initial sampling. To produce reliable predictions efficiently the minimal sampling size and combination should be decided firstly, which avoides the misspent funds for field sampling work. A 7.9 hectare silage field close to the Agricultural Research Institute at Hillsborough, Northern Ireland, was selected for the study. Grid sampling method (25m×25 m) was adopted and there were 123 sampling points in this field. Based on all sampling data, the least required numbers of soil properties were calculated for a 95% confidence within 5% of population mean. Using the geo-statistical method of Kriging with the data in the various sampling combinations for soil available P and K were made at sampling points from which the known values had been removed. These predicted data groups were compared using Least Significant Difference (LSD) test method. The results showed that the 62 sampling size of triangle arrangement for soil available K were sufficient to fulfil the required accuracy. The triangular design to be more efficient of Kriging than a rectangular or hexagonal sampling arrangement.