to determine sugar beet water requirement and the effect of changing the quantity of applied water on some production components, a study was carried out in ekbatan agricultural research station of hamedān, iran in four years (1994-1997) during which optimum water requirement, root and sugar yield, water use efficiency on the basis of root yield, sugar percentage and water use efficiency on the...

the increase of healthcare costs improved as a rule the health of the population. sometimes the positive effects of this expense are shaded off. on one hand, this expense improves the offer of the medical care. other influential factors on the health of population, we quote as example the training, the lifestyle, the hygiene and the distribution of income. on the other hand the increase of thes...

this paper is a survey of recent contributions to and developments in the relationship between efficiency and productivity via the production function. the objective is to provide a brief discussion on data and on the methods of measuring efficiency and productivity. first, we introduce the reader to the measurement of partial and total factor productivity in the context of static and firm - sp...

abstract plant species differ in their ability to grow at low available p soils in other words, plant species differ in p use efficiency at low p supply. this ability can be investigated by comparing p uptake efficiency of plants and relative effective factors. a pot experiment was carried out in the growth chamber and sugar beet, maize and groundnut were grown in a low available p soil in a co...

in order to study of sodium nitroprusside(snp) application effect on growth indices and water use efficiency of kidney beans cultivars(akhtar and derakhshan) under water deficit stress, an experiment was conducted in split factorial based in randomized complete block design with three replications in bu-ali sina university research field at 2012. water stress treatments included vegetative stre...

economic growth is the most important purpose of developing countries. each country can improve social welfare and access to international markets by increasing production potential. production can increase by two ways: the first one, using more inputs that raising production cost and the second one, improving efficiency that can produce more output with certain inputs or the same output with l...