The use of surfactants to reduce soil hydrophobicity (water repellency) and decrease localized dry spots is now a proven and well accepted turfgrass management practice. However, for many surfactants to be effective, they must be applied on a monthly or even shorter frequency schedule during critical summer stress periods that may last four or more months.
Regardless of the efficacy of a surfactant, how long it will maintain its promised performance is usually determined by the how rapid its polymer structure is degraded by microbes and chemical interactions in the soil profile. Oftentimes, the required frequency of applications needed to overcome microbial decay of these shorter term products makes use of these surfactants unfeasible.
SPAN is a specialized extended term soil surfactant formulation designed to provide an economical, long-term solution to water repellent soils resulting in improved uniform water movement, distribution, retention, drainage and air : water ratios soils for approximately 120 days!