Twelve young Valencia orange trees which were budded on Rough lemon stock, were planted into 50-gallon containers on April 28, 1947. The containers were perforated in the bottom and filled with a very fine, white quartz sand. These units were depressed in soil for nearly their full length. The capillary contact with the subsoil induced good drainage and permitted good root development throughou...

Autotrophs play an essential role in the cycling of carbon and nutrients, yet disease-ecosystem relationships are often overlooked these dynamics. Importantly, availability elemental nutrients like nitrogen phosphorus impacts infectious disease autotrophs, can induce reciprocal effects on ecosystem nutrient Relationships linking with dynamics bidirectional, though interdependence processes has ...

OBJECTIVE To study the material basis of the tonifying effect of Radix Changii by observing its contents of nutrient elements. METHODS The contents of vitamins in Radix Changii and inorganic elements in the water extracts of it were tested by high performance liquid chromatography, fluorescence spectrophotography and scanning electron microanalysis. RESULTS Radix Changii contains fat-solubl...

Actively growing turfgrasses usually contain more than 75 percent water. Their “dry” matter holds 16 nutrient elements considered essential for survival, flowering and/or seed production. Turfgrasses receive three of these, carbon (C), hydrogen (H) and oxygen (O), from carbon dioxide in the air and from water. The remaining essential elements are minerals, most often supplied by the soil. Healt...