Although cast as a lumpen ugly sister to more glamorous herbs, it is actually an essential plant for any situation in any garden.
This naturally occurring mineral combines both sulphur and another essential plant nutrient, magnesium, in a double whammy and can be bought for minimal cost at any garden centre.
In effect, the value of manure as a mulching material may be greater than is its value as a source of essential plant nutrients.
Nitrogen (N) is an essential plant nutrient and is incorporated into nucleic acids, amino acids, and metabolites.
Recently, however, novel approaches exploiting knowledge from root and leaf development are starting to shed light on molecular mechanisms that regulate this essential plant organ.
Both mulch treatments had significant effects on organic matter content, soil respiration, microbial biomass N, soil pH, cation-exchange capacity, and concentrations of essential plant nutrients.
In addition, as plants spread into unpredictable environments such as arid deserts they grew less dependent on the symbiotic fungi — or mycorrhiza — that colonize roots and help host plants obtain the essential plant nutrients nitrogen and phosphorous.
On each location spring barley was cultivated either with or without P fertilization, and soil analyses were regularly compared with the composition of essential plant nutrients in leaf tissue and with the final grain yields.
Whole-plant concentration was measured for 12 essential plant nutrients (N, P, K, Ca, Mg, S, Fe, Cu, Mn, Zn, Mo and B) and Na (often considered as a beneficial nutrient).
Because some of the trace metals contained in dust are essential plant nutrients which can limit phytoplankton growth in parts of the ocean, it has been suggested that variations in dust supply to the surface ocean might influence primary production3,4.
The scope and suddenness of the algae blooms took scientists by surprise, but their source is no secret: off Brevard County, the estuary is badly overloaded with nitrogen, an essential plant nutrient found in fertilizers, rotting organic matter and human and animal waste.
