Dr Stephen W Baker, s\u00e9rfr\u00e6\u00f0ingur \u00ed uppbyggingu og umhir\u00f0u grasvalla, hefur undanfarna daga heims\u00f3tt \u00edslensk knattspyrnuf\u00e9l\u00f6g og teki\u00f0 \u00fat grasvelli, m.a. meti\u00f0 \u00e1stand og fari\u00f0 yfir vi\u00f0haldsa\u00f0ger\u00f0ir. Dr Baker tekur einnig jar\u00f0vegss\u00fdni og metur \u00e1bur\u00f0arinnihald \u00ed vaxtarlagi vallanna.<\/p>\n
Samkv\u00e6mt Dr Baker er algengt vandam\u00e1l \u00e1 v\u00f6llum h\u00e9rlendis a\u00f0 moldarlag sem fylgir gras\u00fe\u00f6kum myndar hindrun sem grasr\u00e6tur eiga erfitt me\u00f0 a\u00f0 vaxa \u00ed gegnum. Algengt er a\u00f0 vellir s\u00e9u bygg\u00f0ir upp \u00e1 sandr\u00edkum jar\u00f0vegi, auk \u00feess sem \u00feeir eru sanda\u00f0ir (toppdressa\u00f0ir) \u00e1rlega. Moldarlagi\u00f0 og sandurinn n\u00e1 ekki a\u00f0 tengjast \u00ed jar\u00f0veginum vegna \u00f3l\u00edkrar efnasamsetningar. Vellir sem s\u00e1\u00f0 er \u00ed t.d. Selfossv\u00f6llur eiga ekki \u00ed \u00feessum vandr\u00e6\u00f0um og segir Dr Baker a\u00f0 s\u00e1 v\u00f6llur s\u00e9 \u00ed \u00e1berandi bestu \u00e1standi m.t.t. r\u00f3tarlags.<\/p>\n
FIFA hefur r\u00e1\u00f0i\u00f0 s\u00e9rfr\u00e6\u00f0inga STRI (The Sports Turf Research Institute)\u00a0til a\u00f0 meta \u00e1stand valla \u00e1 \u00f3l\u00edkum loftslagssv\u00e6\u00f0um, m.a. \u00e1 \u00cdslandi. \u00d3h\u00e6tt er a\u00f0 fullyr\u00f0a a\u00f0 mikill fengur s\u00e9 af heims\u00f3kn Dr Stephens Baker sem er lei\u00f0andi s\u00e9rfr\u00e6\u00f0ingur \u00e1 s\u00ednu svi\u00f0i \u00ed heiminum.<\/p>\n