J. G. Clapp CLAPP, J. G. (1974). OVERSEEDING SMALL GRAIN IN STANDING SOYBEANS VS CONVENTIONAL PLANTING METHODS. AGRONOMY JOURNAL, Vol. 66, pp. 463–464. https://doi.org/10.2134/agronj1974.00021962006600030040x CLAPP, J. G. (1973). RATE AND TIME OF NITROGEN APPLICATION ON BLUEBOY WHEAT (TRITICUM-AESTIVUM L). AGRONOMY JOURNAL, 65(1), 5–7. https://doi.org/10.2134/agronj1973.00021962006500010002x CLAPP, J. G. (1973). RESPONSE OF BRAGG SOYBEAN TO TIBA (2,3,5-TRIIODOBENZOIC ACID). AGRONOMY JOURNAL, 65(1), 41–43. https://doi.org/10.2134/agronj1973.00021962006500010012x CLAPP, J. G., & SMALL, H. G. (1970). INFLUENCE OF POP-UP FERTILIZERS ON SOYBEAN STANDS AND YIELD. AGRONOMY JOURNAL, 62(6), 802-&. https://doi.org/10.2134/agronj1970.00021962006200060036x