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1. Soil SodicitySoil sodicity refers to the amount of sodium held on soil cation exchange sites. It is typically expressed either as the percentage of the soil cation exchange capacity filled with sodium ions (exchangeable sodium percentage or ESP), or as a ratio comparing exchangeable sodium to exchangeable calcium plus magnesium (sodium adsorption ratio or SAR). Our primary interest in soil sodium is its impact on soil structure. Sodium, like all soil cations, can flocculate clay particles if present in adequate... J. Walworth |
2. The Effect of Cyanobacteria Biofertilizer on Western Colorado Organic Peach Quality and Yield CharacteristicsNitrogen (N) is the nutrient needed by crops in the highest amounts and the production of synthetic N fertilizers contributes the highest proportion of carbon dioxide to the atmosphere, when compared to other sectors of agriculture. Cyanobacteria are naturally occurring in most ecosystems and fix nitrogen gas from the atmosphere into forms which are useable by plants. Cyanobacteria was applied along with irrigation water to organically farmed peach trees (Prunus persica cv. Suncrest) as a... D. Sterle, G. Litus, F. Stonaker, S. Ela, J. Davis |