Seasonal nutrient variation has been studied for several trees but not for ponderosa pine (Pinus Ponderosa Laws). The objectives of the research reported here were: 1) to provide basic information on seasonal variation of foliage nutrient levels in ponderosa pine seedlings, 2) to determine if seasonal variations in those levels may limit survival and growth of ponderosa pine in shelterbelts in South Dakota, and 3) to determine if differences existed between seedlings from three nurseries over a 3-year period.
South Dakota State University
Baer, Norman W., "Nutrient Content in Ponderosa Pine Foliage: Seasonal Variation" (1984). Agricultural Experiment Station Technical Bulletins (1939-2011). 77.