What is in this article?:
- Irrigated Lands Program increases fertilizer scrutiny
- Nitrogen use efficiency
- The draft Long-Term Irrigated Lands Regulatory Program expands scope to include every irrigated acre of the 7 million acres of farmland in the Central Valley.
- Also expands legal coverage to growers for any movement of water into ground water.
- The biggest changes in the program for growers will be the inclusion of ground water monitoring and mitigation requirements with a focus on nitrogen fertilizers and salt.
Reaction to the proposed permanent Irrigated Lands Program is generally mixed in the farming community. On one hand, of the options initially considered, new regulations could have been much more onerous for growers who irrigate farmlands in California. At the same time, the proposed new program ushers in considerable new monitoring and mitigation requirements, particularly for growers who farm in areas prone to offsite movement, or where water quality problems are an issue.
The draft Long-Term Irrigated Lands Regulatory Program expands the scope to include every irrigated acre of the 7 million acres of farmland in the Central Valley, while also expanding the legal coverage to growers for any movement of water into ground water. A draft of the new program was released in July, followed by a public comment period that closed Sept. 27.
Ground water issues
The biggest changes in the program for growers will be the inclusion of ground water monitoring and mitigation requirements with a focus on nitrogen fertilizers and salt. Under those new requirements, growers in areas deemed high risk or known to have ground water quality issues will have to undertake efforts to reduce possible ground-water contamination.
Growers will notice other changes as well. The Central Valley Regional Board, which spearheads the program, will continue to work through water quality coalitions for monitoring and outreach. However, growers will be required to enroll directly with the Regional Board and likely pay higher fees to cover expanded regulatory costs.
Over the next four or five years, growers should expect the Regional Board to focus its limited resources for regulatory action on individual growers, especially in areas where there are known water quality problems. The 300-page draft proposes dividing the vast Central Valley region into high-risk and low-risk areas for ground and surface water quality.
Ground water protection areas
Growers in higher risk “Tier 2” zones, based on the state’s currently established Ground Water Protection Areas, should expect to comply with more intense ground water protection expectations.
Landowners in Tier 2 lands with ground water or surface water issues associated with agriculture will need to develop Farm Water Quality Management Plans. Coalitions are expected to assist members in developing the plans.
Nutrient management plans will be required under the Water Quality Management Plan where ground water is impaired in a Tier 2 area. Plans will need to be signed off by the Water Board, an agronomist or certified crop adviser (CCA).
Once the Water Board has accepted the final version of the program, requirements of the new long-term program will be phased in over three years beginning in March 2011. The addition of ground water, along with current concerns about elevated nitrates in drinking water for a number of communities in the Central Valley, will mean that growers will need to evaluate their nitrogen fertilizer applications as well as assess how to minimize downward movement.