Nicholas E. Clark
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View article: On the suitability of non-dormant alfalfa to tolerate off-season groundwater recharge during winter and spring periods
On the suitability of non-dormant alfalfa to tolerate off-season groundwater recharge during winter and spring periods Open
Winter groundwater recharge, which involves flooding farmland with excess surface water during the dormant season to replenish underlying aquifers, is a promising water conservation strategy, and alfalfa represents a particularly promising…
View article: Nitrogen mineralization from soil organic matter under field conditions in California soils
Nitrogen mineralization from soil organic matter under field conditions in California soils Open
One approach to achieving high nitrogen (N) use efficiencies in crop production is to accurately estimate site‐specific non‐fertilizer N sources, including N mineralization from soil organic matter (SOM). In the present study, an N balance…
View article: Optimizing Sorghum for California: A Multi-Location Evaluation of Biomass Yield, Feed Quality, and Biofuel Feedstock Potential
Optimizing Sorghum for California: A Multi-Location Evaluation of Biomass Yield, Feed Quality, and Biofuel Feedstock Potential Open
Sorghum cultivars, particularly those used for forage and biomass, present significant potential as drought-resistant crops suitable for animal feed and biofuel production. This study evaluated 59 sorghum hybrids over five years (2019–2023…
View article: Setting research and extension priorities for agronomic crops in California
Setting research and extension priorities for agronomic crops in California Open
Agronomic crop production in California, including grains and animal feed, faces multiple challenges that could be addressed by extension support. This means that extension services need to understand priorities for using their limited res…
View article: Optimizing accuracy of measurement protocols for nitrogen application in dilute dairy manure
Optimizing accuracy of measurement protocols for nitrogen application in dilute dairy manure Open
Variability of dairy process wastewater (PWW) nitrogen (PWW‐N) content makes precise fertilizing of forage challenging. Our objective was to improve measurement accuracy of PWW‐N. We characterized PWW‐N and quantified its variability using…
View article: Registration of aphid‐resistant ‘California Blackeye 77’ cowpea
Registration of aphid‐resistant ‘California Blackeye 77’ cowpea Open
‘California Blackeye 77’ (CB77) (Reg. no. CV‐344, PI 698656) is a blackeye‐type cowpea [ Vigna unguiculata (L.) Walp] cultivar developed by the University of California, Riverside. CB77 is distinguished from the industry standard cultivars…
View article: Top management challenges and concerns for agronomic crop production in California: Identifying critical issues for extension through needs assessment
Top management challenges and concerns for agronomic crop production in California: Identifying critical issues for extension through needs assessment Open
Agronomic cropping systems in many regions face growing economic and management challenges as well as new regulations designed to address negative environmental and social externalities. At the same time, public support for agricultural ed…
View article: Garbanzo Bean (Chickpea) Production in California
Garbanzo Bean (Chickpea) Production in California Open
Garbanzo Bean