1. (1) Each calendar year, following implementation of an annual nitrogen plan, a landowner subject to this rule shall prepare a post-harvest summary record on a worksheet provided by the department or according to a format otherwise used by the landowner. The post-harvest summary record shall be used to evaluate the effectiveness of an annual nitrogen plan.
   (2) A post-harvest summary record shall include each of the following elements.
   (a) Landowner Name. Record the name of the landowner and the name of the operator if operator is not the owner of the land.
   (b) Crop Year (harvested). Record the crop year for the calendar year that the crop is harvested.
   (c) Crop Type. For each field, record the type of crop(s) harvested.
   (d) Crop Harvest Yield. Record the crop harvest yield in crop production units per acre and include all harvested materials from primary harvest, secondary crop harvests, and crop residue or other materials (lbs/acre).
   (e) Irrigation Water Management Measures. For each field, record the irrigation method(s) used and assess whether the goal in OAR 603-095-5025(1) was met.
   (f) Nitrogen Management Measures. Record nitrogen management measures implemented, including the agronomic application rate used for each crop.
   (g) Total Nitrogen Applied (lbs/acre). For each field, record the total nitrogen applied as follows:
   (A) Total nitrogen applied through irrigation water;
   (B) Total nitrogen applied through fertilizer; and
   (C) If applicable, total nitrogen from crop residues or cover crops.
   (h) Annual Nitrogen Plan Evaluation. For each field, using a methodology described in OAR 603-095-5055 record a determination of whether the annual nitrogen plan was met or followed or not, and a description of the methodology(ies) used to make this conclusion.
   (i) Adaptive Management Measures. For each field, describe any applicable adaptive management measures from Table 1 in OAR 603-095-5055(8) to be employed in the following calendar year’s annual nitrogen plan.

Statutory/Other Authority

ORS 561.191 & ORS 568.900-933

Statutes/Other Implemented

ORS 568.900-933 & 468B.025(1)

History

DOA 94-2026, adopt filed 03/13/2026, effective 03/13/2026