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1. Use of Non-replicated Observations and Farm Trials for Guiding Nutrient Management DecisionsReplication or repetition is the means by which experimental error is estimated in replicated trials. In farm trials, it is sometimes not possible to replicate demonstration and test plots due to manageability and costs. In these situations, non-replicated observations and on-farm trials are used. In addition, nutrient response studies are often needed to calibrate the fertilizer requirement of a field. In this paper, we will define on-farm trials and observations, discuss the nature and underlying... S. Machado, K. Girma |
2. Opportunities and Challenges: Using Soil Health Indicators to Guide On-farm ManagementThe USDA Natural Resources Conservation Service (NRCS) was founded in 1935 as the nation grappled with drastic depletion of soil resources in the Dust Bowl era. Initially called the Soil Conservation Service, the NRCS is a non-regulatory federal agency that offers technical and financial assistance to support conservation on private working lands. In August 2012, the agency rededicated itself to its roots in soil conservation by launching a Soil Health Initiative. ... K. Lowell |
3. Nitrogen Nutrition Impact on Incidence of Rhizoctonia Infection of Agrostis StoloniferaCreeping bentgrass (Agrostis stolonifera L.) is tolerant of short mowing and high traffic, but these conditions increase pathogen susceptibility. A prevalent disease on bentgrass golf course greens and tee boxes is Brown Patch (Rhizoctoniasolani). One potential component of integrated pathogen management is correct nitrogen (N) fertilization. Bentgrass was grown in a chamber hydroponically at deficient, optimum, and excessive levels of N (2.5, 10, and 80 mM; equivalent to 6.9, 27.5, and 220... B. Hopkins, B. Black, B. Neville, C. Ewell, B. Geary |