The word 'humus' is correct and usable in written English.
It is a noun that refers to the organic component of soil, formed by the decomposition of plant and animal matter. Example: The farmer fertilized his crops with humus, which improved the nutrient content of the soil and led to a bountiful harvest.
Verdict: FMNR is an inexpensive way for farmers to make improvements with the resources they already have, increasing millet harvests from 430kg to 750kg a hectare, and saving money on fertilisers, with restored trees producing leaf litter (forming humus) and giving shade to livestock (for manure).
Apart from anything else, they can do wonders with a chick-pea – not only is the humus fantastic but their chick-pea cake is delicious and best enjoyed with a cold glass of local Alhambra beer.
Luvisols are technically characterized by a surface accumulation of humus overlying an extensively leached layer that is nearly devoid of clay and iron-bearing minerals.
Only a fraction of the total area has proper humus and sufficient water supplies for significant irrigation agriculture.
Much of the undecomposed organic matter in sediment and sedimentary rocks is humus, plant matter that accumulates in soil.
Clay and humus affect both soil porosity and permeability by binding soil grains together into aggregates, thereby creating a network of larger pores (macropores) that facilitate the movement of water.
When they are used as a foundation for houses and other structures, problems can result as the soils swell when wet and shrink when dry. Characterizing the dry climates of the intermontane basins of the United States, most of the Mexican Plateau, and the southwest Pacific Coast, aridisols are found where vegetation is sparse and where, accordingly, little humus has formed at the surface.
In southwestern Russia, in portions of the Transcaucasus region, and especially in Ukraine, some soils that have been formed in areas of grass steppe are chernozems (black earths)—deep, friable, humus-rich, and renowned for their fertility.
They presumably derive nourishment from decaying matter and occur in humus-rich soil, in rock fissures, or among roots on the trunks of tree ferns.
The soil in the west and north is alluvial and often marshy, while in the east it is of a humus-carbonate type.
Chernozems (from the Russian words for "black earth") are humus-rich grassland soils used extensively for growing cereals or for raising livestock.
