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H.M. Mathers, S.B. Lowe, C. Scagel, D.K. Struve and L.T. Case

substrates can be increased by increasing the percentages of coarse particles or using deeper containers; however, too high a proportion of coarse components can decrease P v , efficiency of water and fertilizer use, efficiency of root function, and plant

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Carolyn F. Scagel, Guihong Bi, Leslie H. Fuchigami and Richard P. Regan

.T. Malzer, G.L. 1990 Nitrogen management and nitrification inhibitor effect on nitrogen-15 urea: I. Yield and fertilizer use efficiency Soil Sci. Soc. Amer. J. 54 115 122 Witt, H.H. 1994 Regulation of nitrogen supply

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Joji Muramoto, Richard F. Smith, Carol Shennan, Karen M. Klonsky, James Leap, Miriam Silva Ruiz and Stephen R. Gliessman

broccoli production and fertilizer use efficiency Agron. J. 75 502 507 Liebman, M. Davis, A.S. 2009 Managing weeds in organic farming systems: An ecological approach 173 195 Francis C.A. Organic farming: The ecological systems Agron. Soc. Amer., Crop Sci