G. S. Pettygrove

A comparison of furrow, surface drip, and subsurface drip irrigation on lettuce yield and applied water

L. Schwankl, K. Schulbach, G. Pettygrove, 1997 .

Characterization of the Thickness and Uniformity of the Coatings of Sulfur-coated Urea 1

L. Boersma, G. Pettygrove, W. Jarrell, 1979 .

Precision agriculture can increase profits and limit environmental impacts

R. Plant, G. Pettygrove, R. E. Plant, 2000 .