Serena Williams hits 157 consecutive weeks at No.1 this week, passing Martina Navratilova for the second-longest streak at No.1 in WTA history.
Answers.comÂ® is making the world better one answer at a time. A pecan tree can start producing pecans anywhere from 4 to 10 years if they are grafted. Ungrafted trees can take 10 to 15 years before producing pecans.
Pecan trees require a lot of water, and the nut size will be stunted without adequate supply. For the first two to three years, young trees need 10 to 15 gallons of water per week, from either rainfall or supplemental irrigation. Take a soil test to determine levels of fertilizer use.