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DAIRY MANURE/COMPOST N RELEASE FOR SUGARBEETS AND SUBSEQUENT WHEAT Given their limited land resources, there is a strong incentive for Idaho dairy and feedlot operations to export their excess manure to nearby farm fields. But the slower N release from organic N sources could be problematic for sugarbeets if the timing of N release interferes with late season suga...
Oilseed Radish (Raphanus Sativus) Effects on Soil Structure and Soil Water Relations Oilseed radish (Raphanus sativus spp. oleifera) reduces nematode populations. Fall-incorporated radish biomass may also improve soil physical and hydraulic properties to increase the yield and quality of subsequently grown sugarbeet (Beta vulgaris L.). This field study determined radish effects on...
Nitrogen placement, row spacing, and water management for furrow-irrigated field corn Banding and sidedressing N fertilizer on a never-irrigated side of a row of corn (Zea mays L.) were hypothesized to maintain yield and decrease nitrate leaching. In a two-year field study on Portneuf silt loam (Durinodic Xeric Haplocalcid) in southern Idaho, we evaluated effects on yield and N upta...
Manure effects on soil N in eroded and non-eroded, sprinkler-irrigated soil Manure effects on nitrate-N transport through irrigated, low-organic matter calcareous soil are not well known. This field study quantified the effects of a one-time fall application of stockpiled dairy manure and urea on in-season and over-winter nitrate-N transport through non-eroded and eroded (...
Freezing and thawing processes Seasonally frozen soil strongly influences runoff and erosion on large areas of land around the world. In many areas, rain or snowmelt on seasonally frozen soil is the single leading cause of severe runoff and erosion events. As soils freeze, ice blocks the soil pores, greatly diminishing the perm...
Sprinkler Irrigation Effects on Infiltration and Near-Surface Unsaturated Hydraulic Conductivity Soil organic carbon (SOC) from dairy manure can help to restore productivity of eroded soil. SOC, irrigation, or both may alter soil hydraulic properties. We evaluated effects of SOC and simulated center-pivot irrigation on infiltration and near-surface hydraulic conductivity (K) measured under tens...
Oilseed Radish (Raphanus Sativus) Effects on Soil Structure and Soil Water Relations Oilseed radish (Raphanus sativus spp. oleifera) reduces nematode populations. Fall-incorporated radish biomass may also improve soil physical and hydraulic properties to increase the yield and quality of subsequently grown sugarbeet (Beta vulgaris L.). This field study determined radish effects on...
Net nitrogen mineralization from past year's manure and fertilizer applications. Manure from the semiarid West’s dairy industries is a rich nutrient source, but its use for crops can be problematic because soil N availability from manure may vary substantially depending on the year of application. Experimental plots established in Idaho on a Portneuf silt loam (coarse silty, mi...
Can surfactants affect management of non-water repellent soils? Surfactants affect the water relations of water repellent soils but may or may not affect those of wettable soils. We studied the effects of three surfactants, Aquatrols IrrigAid Gold®, an ethylene oxide/propylene oxide block copolymer, and an alkyl polyglycoside, along with untreated tap water as ...
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