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United States Department of Agriculture

Agricultural Research Service

Research Project: Using Agricultural and Industrial Byproducts to Improve Crop Production Systems and Environment Quality

Location: National Soil Dynamics Laboratory

Title: Evaluation of gypsum rates on greenhouse crop production

Authors
item Brown, Brian -
item Sibley, Jeff -
item Watts, Dexter
item Torbert, Henry
item Foshee Ii, Wheeler -

Submitted to: ASA-CSSA-SSSA Annual Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 21, 2012
Publication Date: October 21, 2012
Citation: Brown, B.W., Sibley, J.C., Watts, D.B., Torbert III, H.A., Foshee Ii, W.G. 2012. Evaluation of gypsum rates on greenhouse crop production. ASA-CSSA-SSSA Annual Meeting Abstracts. CDROM.

Technical Abstract: This study was to determine the potential of an added value distribution channel for gypsum waste by evaluating various greenhouse crops with captious pH and calcium needs. Three studies consisting of: Zonal geranium (Pelargonium x hortorum) and petunia (Petunia x hybrida); tomato (Solanum lycopersicum); and three varieties of ferns (Nephrolepis obliterata, N. exaltata, and N. exaltata ‘Roosevelt’) were grown using FGD gypsum rates of 5.5, 11, 16.5, and 22 lb/yd³. (The tomato and fern studies included rates of 27.5 and 33 lb/yd³, and geranium and petunia study included 5 lb/yd³ dolomitic lime (DL) and 5 lb/yd³ DL + 5.5 lb/yd³ gypsum). Geraniums and petunias showed no significant differences between treatments. Two of the species of ferns did show significant differences in treatments, but there was no apparent pattern to those differences. The occurrence of blossom end rot on the tomatoes was reduced by the addition of FGD gypsum.

Last Modified: 11/26/2014
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