Ahn C W,Baumgardner M F,Biehill.Delineation of soil variability using geostatistics and fuzzy clustering analyses of hyperspectral data[J].Soil Sci Am J,1999,63:142-150.
Parkin T B.Spatial variability of microbial process in soil:a review[J].Environ Qual,1993,22:409-417.
[10]
Wild A.The potassium status of soils in the savanna zone of Nigeria[J].Expl Agric,1971,7:257-270.
[11]
Ovalles F A,Collins M E.Soil landscape relationships and soil variability in north central Florida[J].Soil Sci Soc Am J,1986,50:401-408.
[12]
Mulla D J.Mapping and managing spatial patterns in soil fertility and crop yield[C] // Robert P C,Rust R H,Larson W E.Soil Specific Crop Management.ASA,CSSA,SSSA,Madison,WI,1993:15-26.
[13]
Franzen D W,Cihacek L J,Hofman V L.Variability of soil nitrate and phosphate under different landscapes[C] //Robert P C.Proceedings of the 3th International Conference on Precision Agriculture.Minneapolis,Minnesota,ASA,CSSA,SSSA,1996:521-529.
[14]
Sadler E J,Bauer P J,Busscher W J,et al.Site-specific analysis of a drought com crop:Ⅱ.water use and stress[J].Agron J,2000,92(3):403-409.
Mallarino A P.Patterns of spatial variability for phosphorus and potassium in no-tilled soil for two sampling scales[J].Soil Sci Am J,1996,60:1473-1481.
[20]
Fisher E,Thornton B,Hudson G.The variability in total and extractable soil phosphor under a grazed pasture[J].Plant and Soil,1998,203:249-255.
[21]
Cambardella C A,Moorman T B,Novak J M.Field-scale variability of soil properties in central Lowa soils[J].Soil Sci Am J,1994,58:1501-1511.
[22]
Goovaerts P,Webster R.Scale-dependent correlation between topsoil copper and cobalt concentrations in Scotland[J].Euro J Soil Sci,1994,45:79-95.
[23]
white J G,Welch R M,Norve W A.Soil Zn map of the USA using geostatistics and geographic information systems[J].Soil Sci Am J,1997,61:185-194.
Berndtsson R,Bahri A,Jinno K.Spatial dependence of geochemical elements in a semiarid agricultural field:Ⅱ.Geostatistical Properties[J].Soil Sci Soc Am J,1993,57:1323-1329.
[27]
Tening A S,Omueti J I.Potassium status of some selected soils under different land use systems in the subhumid zone of Nigeria[J].Commun Soil Sci Plant Anal,1995,26(5,6):657-672.
[28]
Miller P M,Singer M J,Nielsen D R.Spatial variability of wheat yield and soil properties on complex hills[J].Soil Sci Soc Am J,1988,52:1133-1141.
[29]
Bhatti A U,Mulla D J,Frasier B E.Estimation of soil properties and wheat yields on complex eroded hills using geostatistics and thematic mapper images[J].Remote Sens Environ,1991,37:181-191.
[30]
Stolt M H,Baker J C,Simpson T W.Soil landscape relationships in Vitgina:Ⅰ.Soil variability and parent material uniformity[J].Soil Sci Soc Am J,1993,57:414-421.
[31]
Alexandra N K,Donald C B.Correlation of com and soybean yield with topography and soil properties[J].Agron J,2000,92(1):75-83.
[32]
Itaru O,Masanri O,Takusei H.Spatial and temporal variations in the cohemical weathering of Basaltic Pyroclastic materials[J].Soil Sci Soc Am J,1995,59:887-894.