Aminoglycosides are excreted by glomerular filtration and have a serum half-life of 2 to 3 h; the half-life increases exponentially as the GFR falls (eg, in renal insufficiency, in the elderly).
Madagascar is the world's major natural vanilla producer, accounting for about 75% of production. Cloves are the third main export crop, grown mostly by smallholders. Production follows a 4-year cycle with 2â3 years of high output followed by one year of low production.
The subsistence crops were mainly grown for survival and not for trade or selling. This means that if you were growing subsistence crops you were doing it to survive and feed â¦ off of these crops. Subsistence crops were mainly grown in areas without rich soil, and agriculture wasn't popular. Cash crops were grown for trading, selling, and also living off of. However the term cash crops is mainly referred to crops grown for money because the area that grew them were typically rich in agricultural benefits. 6 people found this useful.