a narrow opening produced by cleavage or separation of parts. 2. cleavage (def 1). 3. Anatomy. a natural division or groove in an organ, as in the brain. verb (used with object), fissured, fissuring. 4. to make fissures in; cleave; split.
A diet rich in potassium helps to counterbalance some of sodium's harmful effects on blood pressure. Foods that are good sources of potassium are listed in the Food Sources of Potassium table on the next page.
Offering an effective macro-nutrient balance usually higher in phosphorous and potassium â two nutrients that best support flowering â they also include additional trace minerals, amino acids and other organic stimulants to replenish growing solutions and prevent weakness, deficiencies and disease.