However one of the major constraints of this technique, when used in field conditions is the spatial variation in surface soil properties (soil water content, roughness, vegetation residue) which induces a spectral variability not directly related to SOC and hence reduces the SOCa accuracy.
Clearing all vegetation and/or harvest residue to mineral soil caused a substantial reduction in growth of up to 21% at age 10 years (Morris: Trial series B43: Comparison of establishment method on first and second rotation sites, Unpublished).
Green and dry pasture vegetation and millet crop residues are the main feed for domesticated ruminants across the West African Sahelian zone.
Goats were herded to graze crops, crop residues and native vegetation in communal land and roadsides.
Here a novel concept is presented, based on cylindrical ligno-cellulosic materials, available as agricultural residues or spontaneous vegetation.
Logging residues linearly decreased competing vegetation cover on two of four sites and reduced fluctuations in soil temperature on all sites.
However, there is no quantitative information on the temporal trend and magnitude of nutrient release during decomposition of plant cover residues after the annual topping of vegetation.
Because logging residues affected seedling microclimate and competing vegetation, their maintenance and on-site spatial arrangement on site could be used to manipulate the growing conditions for planted trees.
The rest is perennial herbaceous vegetation, mixed vegetation and annual herbaceous vegetation, and barren land.
However, the simplicity as well as low energy and monitoring requirements of this technology are often counterbalanced by frequent operational problems consisting of slow and insufficient dewatering, poor vegetation growth, odor, and overall poor mineralization of the sludge residues.
