1a. Objectives (from AD-416)
The purpose of this agreement is to carry out cooperative research and to set forth understandings between ARS and Colorado State University for joint projects and co-location of CSU and or ARS personnel at research sites and facilities in Colorado. 1. It is understood and agreed that while all parties are interested in basic and applied research: a. ARS is concerned with results having regional or national application; b. CSU Agricultural Experiment Station Research Centers conduct research that addresses economic viability and environmental sustainability impacting agriculture, natural resources, and consumers in Colorado; c. CSU Extension provides information and non-credit education, and encourages the application of research-based knowledge to end users in Colorado; d. CSU College of Agricultural Sciences and departments within the College as well as other Colleges and departments are engaged in soils, crop health and production, irrigation and water management, and environmental management research covering both basic and applied problems. 2. Investigations, as described in the exhibits, as well as other joint projects will be in cooperation with the CSU Agricultural Experiment Station, CSU Extension, CSU College of Agricultural Sciences and related departments within the College, and other Colleges, departments and units as appropriate to the joint projects. ARS and CSU may also engage with private parties and nonprofit entities in Colorado to enhance the cooperative research efforts.
1b. Approach (from AD-416)
To develop long-term sustainable soil and crop management practices for the Central Great Plains Region (CGPR) and identify technologies that maximize the use of the region's soil and water resources with minimal negative environmental impact. This includes: (1) the development of sustainable soil, nutrient, weed control and water conservation technologies for dryland cropping systems that improve water and nutrient use efficiency and maintain/improve desirable soil physical and chemical properties (sequester C and improve soil quality); (2) quantify microbial plant associations and their effects on plant productivity in no-till dryland cropping systems; (3) develop best management practices for remediation/restoration of degraded soils; and (4) develop soil and crop management practices to include bio-fuel specialty crops into alternative dryland cropping systems. These projects will fill information gaps and address urgent needs, including the assessment of the variability in N use efficiency of different lines of wheat and the long-term ramifications of intensive no-till rotation management on farm-gate economics and soil quality of regions farmland.
3. Progress Report
A minor literature review is complete and a first draft of the experimental design of the research has been circulated to the CSU and ARS collaborators. The design is a split plot design with N regimes as the main plot. There will be 5 different N regimes as main plots fertilized at: 0, 25, 50, 75 or 100 lbs N/acre. Within each N regime 20 different wheat varieties will be planted into individual subplots. Each variety will be grown under each of the 5 different N regimes. Each block of N by variety will be replicated at least 4 times. Grain yield, biomass yield and apparent N recovery will be measured in each plot and a soil N balance will accompany each N by variety combination. Traditional N rate by yield analysis will be performed to determine wheat varietal differences to N response. The site for the experiment is located on new land that is N limited, so the expectation for N response providing average or normal precipitation is high. ARS researchers and technicians collaborate with the CSU wheat breeding project on a wheat variety nursery that is evaluating 4000-6000 wheat varieties on an annual basis.