Bioavailable Phosphorus in Soil
{"Image DocumentName": "Bioavailable Phosphorus in Soil", "Image ImageDescription": "Andrew Sharpley, USDA-ARS, University Park, PA. SAMPLING TANAH: Soil sampling protocol for environmental concerns should be re-evaluated since the primary mechanism for P transport from most agricultural soils is by surface runoff and erosion. Although most samples submitted to soil testing laboratories are obtained from 0 to 20 cm, the zone of interaction of runoff waters with most soils is normally less than 5 cm. Consequently, environmental soil sampling should reflect this shallower depth of soil influencing runoff P. Hence, environmental soil samples should, in general, be taken from no deeper than 5 cm. This protocol is compatible with sampling of no-till fields, currently recommended by extension specialists in several states, where the traditional 0-to 20-cm depth is split into two or three increments. Pada tanah-tanah yang rentan terhadap kehilangan P melalui runoff, the surface increment could be analyzed for environmental interpretation and all increments integrated for agronomic interpretations. Diunduh dari: https://secure.hosting.vt.edu/...vt.../Methods_of_P_Analysis_2000.pd... \u2026\u2026\u2026 27/3/2013.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}