The temporal distribution of soil nutrients is heterogeneous, and thus the uptake, storage and later remobilization of brief nutrient pulses may be critical for growth in nutrient-limited habitats. We investigated the response of 2-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings receiving a low nutrient supply to a 15-day nutrient pulse (containing 250 ppm nitrogen (N) as ...

this research was carried out to investigate the effect of different levels of potassium (in nutrient solution), harvest season and plant density on yield and quality of strawberry cv. selvain hydroponic system conditions. the tests were done in the greenhouse, and laboratories of horticultural science department of the university colleg of agriculture and natural resources of tehran university...

In many contexts, nutrient excretion by consumers can impact ecosystems by altering the availability of limiting nutrients. Variation in nutrient excretion can be predicted by mass balance models, most of which are premised on two key ideas: (1) consumers maintain fixed whole-body nutrient content (i.e., %N and %P), so-called fixed homeostasis; (2) if dietary nutrients are not matched to whole-...

Acidic deposition and subsequent forest soil acidification and nutrient depletion can affect negatively the growth, health and nutrient content of vegetation, potentially limiting the availability and nutrient content of forage for white-tailed deer (Odocoileus virginianus) and other forest herbivores. Liming is a mitigation technique that can be used to restore forest health in acidified areas...

OBJECTIVE To assess the nutrient profile of yoghurts and dairy desserts. DESIGN Nutrition information panels and product labels on yoghurts and dairy desserts offered for sale were surveyed in 2005 and 2008 and nutrients analysed by two nutrient profiling systems. SETTING A large supermarket in metropolitan Melbourne, Australia. RESULTS In total, 248 and 140 dairy snacks (yoghurt, fromage...

An experiment was carried out to evaluate the effect of various concentrations of Mg (0, 1, 2, 3 and 4 mM) in the nutrient solution and shading (0 and 50%) on growth, yield, fruit quality and physiological properties in hydroponically grown cucumber (Cucumis sativus L. cv. Nagen 792). With increased Mg concentration in both shaded and unshaded plants, the total plant leaf area and dry weight of...

Turfgrass nutrient uptake may be differentially affected by different salts. The objective of this study was to compare nutrient uptake in tall fescue (Festuca arundinacea Schreb.) as affected by carbonate, chloride, and sulfate under iso-osmotic, iso-Na+ strength conditions. 'Tar Heel II' and 'Wolfpack' cultivars were subjected to NaCl, Na2CO3, Na2SO4, CaCl2, NaCl+ CaCl2, Na2CO3+ CaCl2, and Na...

pretation of sugarand calorierelated nutrient-content claims through transparent food marketing are needed steps to empower parents to make informed choices. If the FDA revised the current labeling requirements for foods and beverages bearing sugarand calorie-related nutrient-content claims in this way, the replacement of added sugars with other sweet ingredients would be clearly highlighted. A...