Lettuce

Demonstration of presidedress soil nitrate testing as an N management tool. T. Hartz. (1998) FREP.
Efficient phosphorus management in coastal vegetable production. T.K. Hartz, M. Cahn, M. Swain-Johnstone. (2003) CPSC.
Efficient use of phosphorous fertilizer in California vegetable production. T.K. Hartz, M. Cahn, M. Swain-Johnstone. (2003) WNMC.
Establishing lettuce leaf nutrient optimum ranges through DRIS analysis. T.K. Hartz, E. Williams, R.F. Smith. (2007) HortScience 42(1):143–146.
Fertilization recommendations for crisphead lettuce grown on organic soils in Florida. G. Hochmuth, E. Hanlon, R. Nagata, G. Snyder, T. Schueneman. (2009) UF IFAS Extension SP153.
Iceberg lettuce production in California. L. Jackson, K. Mayberry, F. Laemmlen, S. Koike, K. Schulbach, W. Chaney. (1996) UC ANR Publication 7215.
Leaf lettuce production in California. L. Jackson, K. Mayberry, F. Laemmlen, S. Koike, K. Schulbach, W. Chaney. (1996) UC ANR Publication 7216.
Lettuce response to phosphorus fertilization in high phosphorus soils. P.R. Johnstone, T.K. Hartz, M.D. Cahn, M.R. Johnstone. (2005) HortScience 40(5):1499-1503.
Nutrient management goals and management practices for cool-season vegetables. S. Pettygrove, T. Hartz, R. Smith, T. Lockhart, B. Hanson, L. Jackson, S. Grattan. (2003) UC ANR Publication 8097.
Nutrient management in cool-season vegetables. S. Pettygrove, T. Hartz, B. Hanson, L. Jackson, R. Smith, T. Lockhart, S. Grattan. (2003) UC ANR Publication 8098.
Nutrient requirements and specific deficiency symptoms of vegetable species. R.J. Wood. (1996) Fertiliser Recommendations for Horticultural Crops, New Zealand Ministry of Agriculture and Fisheries.
Pre-sidedress soil nitrate testing (PSNT) improves N management in lettuce production. T.K. Hartz, S.J. Breschini. (2001) WNMC.
Presidedress soil nitrate testing reduces nitrogen fertilizer use and nitrate leaching hazard in lettuce production. S.J. Breschini, T.K. Hartz. (2002) HortScience 37(7)1061-1064.
Reevaluating tissue analysis as a management tool for lettuce and cauliflower. T.K. Hartz. (2007) FREP.

CPSP = California Plant and Soil Conference
FFTC ASPAC = Food & Fertilizer Technology Center for the Asian and Pacific Region
FREP = Fertilizer Research and Education Program completed project
IFAS = Institute of Food and Agricultural Sciences
UC ANR = University of California Agriculture and Natural Resources
WNMC = Western Nutrient Management Conference
WTFRC = Washington Tree Fruit Research Commission