Soybean seed can be planted up to 2 inches deep in sandy soils.Īdequate soil moisture is the most important factor affecting soybean germination. Planting at the deeper end of the range is recommended under the following conditions: As a general rule, plant at the shallower end of the range under the following conditions: Under most conditions, soybeans should be planted between 1 and 1.5 inches deep. An even bigger concern is that in 68 percent of the fields, the seed was planted too deep, a condition known to delay emergence. Planting depth surveys revealed that only 20 percent of the fields planted with drills were planted at or near the intended depth. Var getUrlParameter = function getUrlParameter(sParam) else if(fieldReqd & fieldVal.Soybean seed is very sensitive to planting depth, so producers need to be careful and get their crop off to a good start. Policy and Links| Non-Discrimination Statement | Information Quality | USA.gov | NRCS Home | | Site Map | Civil Rights | FOIA | Plain Writing | Accessibility Statement The WRB borrows heavily from modern soil classification concepts, including Soil Taxonomy, the legend for the FAO Soil Map of the World 1988, the Référentiel Pédologique, and Russian concepts. The WRB system is endorsed by the International Union of Soil Sciences and developed by an international collaboration coordinated by the IUSS Working Group. World Reference Base (WRB) - The WRB, along with Soil Taxonomy, serve as international standards for soil classification. Universal Soil Classification System - a Working Group under Commission 1.4 (Soil Classification) which is part of Division 1 (Soil in Space and Time) of the International Union of Soil Sciences ( IUSS)
The Twelve Orders of Soil Taxonomy - poster.
Historical International Committee Recommendations (ICOMFAM, ICOMID, etc.)ĭistribution Maps of Dominant Soil Orders - images and maps. Kellogg published in 1936ġ918-1922 Soil Classification Keys for the Soil Provinces and Soil Regions of the United States (PDF 800 KB) The Post Guy Smith Interviews: Advances in Soil Taxonomy Since the Mid-1980sĭevelopment and Significance of the Great Soil Groups of the United States (PDF 5.82 MB) by Charles E. The Guy Smith Interviews: Rationale for Concepts in Soil Taxonomy Previous versions of the Keys to Soil Taxonomy Java Newhall Simulation Model (jNSM) – A traditional soil climate simulation model (software, user’s guide, and sample datasets)
Links to Official Soil Series Descriptions (OSD), Soil Series Classification Database (SC), SC/OSD Maintenance Tool, and Soil Classification Report Tool have been moved to Tools & Data. Keys to Soil Taxonomy - taxonomic keys for field classification.
How to Submit a Taxonomy Proposal (PDF 91 KB).Soil Taxonomy - principal reference to soil classification. Sign up for E-mail updates on Soil Classification Soil Taxonomy