Ariz. Admin. Code § 18-2-613

Current through Register Vol. 30, No. 50, December 13, 2024

Section R18-2-613 - Definitions for R18-2-613.01

1. "Access restriction" means restricting or eliminating public access to noncropland with signs or physical obstruction.

2. "Aggregate cover" means gravel, concrete, recycled road base, caliche, or other similar material applied to non-cropland.

3. "Artificial wind barrier" means a physical barrier to the wind.

4. "Bed row spacing" means increasing or decreasing the size of a planting bed area to reduce the number of passes and soil disturbance by increasing plant density.

5. "Best management practice" means a technique verified by scientific research, that on a case-by-case basis is practical, economically feasible, and effective in reducing PM₁₀ emissions from a regulated agricultural activity.

6. "Chemical irrigation" means applying a fertilizer, pesticide, or other agricultural chemical to cropland through an irrigation system.

7. "Combining tractor operations" means performing two or more tillage, cultivation, planting, or harvesting operations with a single tractor or harvester pass.

8. "Commercial farm" means 10 or more contiguous acres of land used for agricultural purposes within the boundary of the Yuma PM₁₀ nonattainment area.

9. "Commercial farmer" means an individual, entity, or joint operation in general control of a commercial farm.

10. "Conservation irrigation" means the use of drips, sprinklers, or underground lines to conserve water, and to reduce the weed population, the need for tillage, and soil compaction.

11. "Conservation tillage" means types of tillage that reduce the number of passes and the amount of soil disturbance.

12. "Cover crop" means plants or a green manure crop grown for seasonal soil protection or soil improvement.

13. "Critical area planting" means using trees, shrubs, vines, grasses, or other vegetative cover on noncropland.

14. "Cropland" means land on a commercial farm that:

a. Is within the time-frame of final harvest to plant emergence;

b. Has been tilled in a prior year and is suitable for crop production, but is currently fallow; or

c. Is a turn-row.

15. "Cross-wind ridges" means soil ridges formed by a tillage operation.

16. "Cross-wind strip-cropping" means planting strips of alternating crops within the same field.

17. "Cross-wind vegetative strips" means herbaceous cover established in one or more strips within the same field.

18. "Equipment modification" means modifying agricultural equipment to prevent or reduce particulate matter generation from cropland.

19. "Limited activity during a high-wind event" means performing no tillage or soil preparation activity when the measured wind speed at six feet in height is more than 25 mph at the commercial farm site.

20. "Manure application" means applying animal waste or biosolids to a soil surface.

21. "Mulching" means applying plant residue or other material that is not produced onsite to a soil surface.

22. "Multi-year crop" means a crop, pasture, or orchard that is grown, or will be grown, on a continuous basis for more than one year.

23. "Night farming" means performing regulated agricultural activities at night when moisture levels are higher and winds are lighter.

24. "Noncropland" means any commercial farmland that:

a. Is no longer used for agricultural production;

b. Is no longer suitable for production of crops;

c. Is subject to a restrictive easement or contract that prohibits use for the production of crops; or

d. Includes a private farm road, ditch, ditch bank, equipment yard, storage yard, or well head.

25. "Permanent cover" means a perennial vegetative cover on cropland.

26. "Planting based on soil moisture" means applying water to soil before performing planting operations.

27. "Precision farming" means use of satellite navigation to calculate position in the field, to reduce overlap during field operations, and allow operations to occur during nighttime and inclement weather, thus generating less PM₁₀.

28. "Reduce vehicle speed" means operating farm vehicles or farm equipment on unpaved farm roads at speeds not to exceed 20 mph.

29. "Reduced harvest activity" means reducing the number of harvest passes using a mechanized method to cut and remove crops from a field.

30. "Regulated agricultural activity" means a commercial farming practice that may produce PM₁₀ within the Yuma PM₁₀ nonattainment area.

31. "Residue management" means managing the amount and distribution of crop and other plant residues on a soil surface.

32. "Sequential cropping" means growing crops in a sequence that minimizes the amount of time bare soil is exposed on a field.

33. "Surface roughening" means manipulating a soil surface to produce or maintain clods.

34. "Synthetic particulate suppressant" means a manufactured product such as lignosulfate, calcium chloride, magnesium chloride, and polyacrylamide, an emulsion of a petroleum product, and an enzyme product that is used to control particulate matter.

35. "Tillage and harvest" means any mechanical practice that physically disturbs cropland or crops on a commercial farm.

36. "Tillage based on soil moisture" means applying water to soil before or during tillage, or delaying tillage to coincide with precipitation.

37. "Timing of a tillage operation" means performing tillage operations at a time that will minimize the soil's susceptibility to generate PM₁₀.

38. "Transgenic crops" means the use of genetically modified crops such as "herbicide ready" crops, which reduces the need for tillage or cultivation operations, and reduces soil disturbance.

39. "Track-out control system" means a device to remove mud or soil from a vehicle before the vehicle enters a paved public road.

40. "Tree, shrub, or windbreak planting" means providing a woody vegetative barrier to the wind.

41. "Watering" means applying water to noncropland.

42. "Yuma PM₁₀ nonattainment area" means the Yuma PM₁₀ planning area as defined in 40 CFR 81.303, which is incorporated by reference in R18-2-210.

Ariz. Admin. Code § R18-2-613

New Section made by final rulemaking at 11 A.A.R. 2210, effective July 18, 2005 (Supp. 05-2). Adopted by exempt rulemaking at 30 A.A.R. 1156, effective 7/2/2015.