What affects growth? Growth is a function of photosynthetic light, plant water status, temperature, and a nutrient index.1 This can be represented as the environmental productivity index (EPI). 1Each of these factors can be represented by an index that takes a value from 0 to 1. Thus, the EPI will also have a value in the range of 0 to 1. The nutrient index is primarily a function of leaf N content.
What affects growth? Growth is a function of photosynthetic light, plant water status, temperature, and a nutrient index.1 This can be represented as the environmental productivity index (EPI). (light)(water)(temperature)(nutrient) = EPI 1Each of these factors can be represented by an index that takes a value from 0 to 1. Thus, the EPI will also have a value in the range of 0 to 1. The nutrient index is primarily a function of leaf N content.
Light — 3 terms 1. PAR – photosynthetically active radiation 2. PPFD – photosynthetic photon flux density, measured per second 3. DLI – daily light integral, sum of PPFD from sunrise to sunset
Temperature-based growth potential PACE Turf developed the temperature-based GP to express the actual temperature in terms of its proximity to optimum temperatures for shoot growth. GP = e−0.5(t−to var )2 where, GP = growth potential, on a scale of 0 to 1 e = 2.71828, a mathematical constant t = average temperature for a location, in celsius to = optimum temperature, 20 for C3 grass, 31 for C4 grass var = adjusts the change in GP as temperature moves away from to ; I suggest 5.5 for C3 and 7 for C4
The best playing surface will be produced when the soil has just enough water to keep the grass from wilting, and the remaining soil volume will be filled with air.
4 things to increase roots on putting greens 1. Mow the grass as high as possible 2. Apply the right amount of N, at the right time 3. Make sure there is plenty of air in the soil
4 things to increase roots on putting greens 1. Mow the grass as high as possible 2. Apply the right amount of N, at the right time 3. Make sure there is plenty of air in the soil 4. Make sure there is enough P in the soil
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