Treating farm dairy effluent with poly‐ferric sulphate dramatically reduces phosphorus and <i>E. coli</i> leaching through subsurface drains—A physical drainage model study

Phosphorus leaching in soils amended with piggery effluent or lime residues from effluent treatment.

Phosphorus (P) in wastes from piggeries may contribute to the eutrophication of waterways if not disposed of appropriately. Phosphorus leaching, from three soils with different P sorption characteristics (two with low P retention and one with moderate P retention) when treated with piggery effluent (with or without struvite), was investigated using batch and leaching experiments. The leaching o...

Whole-farm Phosphorus Management on Dairy Farms

Most dairy farms in Wisconsin continue to follow a fairly generalized formula of how to produce milk. Cows and replacement heifers are fed primarily homegrown feed from crop rotations comprising alfalfa (Medicago sativa L.), corn (Zea mays L.), oats (Avena spp.) and soybean (Glycine max L. Merr.). Protein and mineral supplements are purchased to compliment dairy diets. However, the dairy indust...

Hydraulic conductivity measurment for subsurface drainage system

Using RZWQM to Predict Herbicide Leaching Losses in Subsurface Drainage Water

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. USING RZWQM TO PREDICT HERBICIDE LEACHING LOSSES IN SUBSURFACE DRAINAGE WATER Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: Transactions of the ASAE. Vol. 47(5): 1415-1426 . (doi: 10.13031/2013.17621) ...

Ranking Dairy Sires by a Linear Programming Dairy Farm Model

Dairy sires were ranked for overall merit by an average daughter's contribution to farm net profit. Biological characteristics of sires and economic factors of a dairy farm were linked by linear programming. Availability and constraints of resources were in the model. Average daughter's returns over variable costs attributable to sire proofs for several traits was the measure of sire's net meri...