958 resultados para fertilizers injection
Resumo:
A compact trench-gate IGBT model that captures MOS-side carrier injection is developed. The model retains the simplicity of a one-dimensional solution to the ambipolar diffusion equation, but at the same time captures MOS-side carrier injection and its effects on steady-state carrier distribution in the drift region and on switching waveforms. © 2007 IEEE.
Resumo:
A 120-day long experiment was conducted to find out the effects of urea plus triple super
phosphate (UT), cow manure (CM) and poultry manure (PM) having iso-nil:rogen
content on pond productivity and fish yield. Three fertilizer treatments, with three
replicates each, were randomly assigned into nine earthen ponds of 100 m2 each. The
stocking fish were rohu (Labeo ruhita), catla ( Catla catla) and mrigal ( Cirrhinus
mrigala) in each treatment pond at the rate of 10000/ha with the ratio of 1:1:1. All ponds
were fertilized fortnightly at the rate of 125 kg/ha urea plus 100 kg TSP/ha, 7000 kg/ha
cow manure and 3500 kg/ha poultry manure for the treatment of UT, CM and PM,
respectively, having an iso-nitrogen content of 56 kg in each. Though the physicochemical
water quality parameters were more or less similar in all treatment ponds, the
chlorophyll-a content and abundance of total plankton were significantly higher (P <
0.05) in the ponds receiving the treatment PM. Final growth as well as per unit
production of fish was significantly higher (p