Anatomy and supply. The thenar musculature consists of four muscles located on the radial side of the palm. Together they form the 'ball' of the thumb known as the thenar eminence. They originate at different carpal bones and distally attach to the thumb. The thenar muscles are: Abductor pollicis brevis muscle: arises from the tubercles of the scaphoid and trapezium, and from the flexor retinaculum.
Steps. 1  1. Choose the proper time to prune lemon trees. 2  2. Remove all fruit from the tree. 3  3. Prune any branches that are damaged or diseased all the way back to the base.  4. Cut any branches that are smaller than the diameter of a 1  pencil. 5. Prune suckers as they appear at any time.  6. Decide if you want an open, compact, or hedge type tree look.
Mature citrus trees need three applications of fertilizer spread throughout the year. Fertilizer should be applied in winter, late spring and late summer. An easy way to remember when it's time to fertilize citrus trees is by the holidays Valentine's Day, Memorial Day and Labor Day. Macronutrients. Citrus trees need nitrogen, phosphorus and potassium, which are called macronutrients. They are often referred to as NPK. Of these macronutrients, nitrogen is the most important for a healthy tree and a good citrus crop.