The manure organic matter decomposition processes are oxidative and proceed only in the presence of water at least up to field capacity moisture content.
From the 42 studies under investigation, 10 used cattle manure featuring dry matter contents from 1.1 up to 15%%.
The cumulative effect supports the observation that poultry manure added organic matter and nutrients to the soil.
Within the remaining 28 studies, pig manure with dry matter contents from 2 up to 22%% was used.
In the finished manure composts, dry matter loss ranged from 30.6 to 63.3%; greatest in composting mixtures charged with super phosphate and poultry manure.
Wheat straw treated with varying levels of urea (0%, 2% and 4%) and molasses (2% and 4%) was ensiled with 30% cattle manure (on dry matter basis) for different fermentation periods (20, 30 and 40 days).
The dominant factors influencing losses can be categorized as: manure characteristics (dry matter content, pH, NH4 N content), application methods (incorporation, time of application), soil properties (soil moisture, soil texture, soil pH), and environmental factors (temperature, wind speed, rainfall, relative humidity).
Several studies (Bórquez et al. 2009; Trujillo et al. 2014) have proved that the inclusion of up to 50%% silage manure as dry matter does not affect the intake and metabolic response in lambs, thus presenting an option as a sustainable resource in ruminant feeding.
Regression equations were developed to predict excretion of total manure, total dry matter, N, P, and K. Predictors used in the regression equations for lactating cows included milk yield, percentages of protein and fat in milk, dietary concentrations of crude protein and neutral detergent fiber, and intakes of nutrients.
During preharvest, contact with contaminated irrigation water, soil, manure, or fecal matter of wild animals may occur.
