REFERENCES
- Gerber , J. M. and Swiader , J. M. 1985. . Fertilizer Guide for Commercial Vegetable Growers Urbana, IL : Univ. of Ill. . Coop. Ext. Ser. Cir. 1185
- Swiader , J. M. , Sipp , S. K. and Brown , R. E. 1994 . Pumpkin Growth, Flowering, and Fruiting Response to Nitrogen and Potassium Sprinkler-Fertigation in Sandy Soil. . J. Am. Soc. Hortic. Sci. , 119 : 414 – 419 .
- Takebe , M. and Yoneyama , T. 1989 . Measurement of Leaf Color Scores and its Implication to Nitrogen Nutrition of Rice Plants. . Jpn. Agr. Res. Quart. , 23 : 86 – 93 .
- Bullock , D. G. and Anderson , D. S. 1998 . Evaluation of the Minolta SPAD-502 Chlorophyll Meter for Nitrogen Management in Corn. . J. Plant Nutr. , 21 : 741 – 755 .
- Piekielek , W. P. , Fox , R. H. , Tooth , J. D. and Macneal , K. E. 1995 . Use of Chlorophyll Meter at the Early Dent Stage of Corn to Evaluate Nitrogen sufficiency. . Agron. J. , 87 : 403 – 408 .
- Schepers , J. S. , Francis , D. D. , Vigil , M. and Below , F. E. 1992 . Comparison of Corn Leaf Nitrogen Concentration and Chlorophyll Meter Readings. Commun. . Soil Sci. Plant Anal. , 23 : 2173 – 2187 .
- Wood , C. W. , Reeves , D. W. , Duffield , R. R. and Edmisten , K. L. 1992 . Field Chlorophyll Measurements for Evaluation of Corn Nitrogen Status. . J. Plant Nutr. , 15 : 487 – 500 .
- Wood , C. W. , Tracy , P. W. , Reeves , D. W. and Edmisten , K. L. 1992 . Determination of Cotton Nitrogen Status with a Hand-Held Chlorophyll Meter. . J. Plant Nutr. , 15 : 1435 – 1448 .
- Hartz , T. K. , LeStrange , M. E. and May , D. M. 1993 . Nitrogen Requirements of Drip-Irrigated Peppers. . HortScience , 28 : 1097 – 1099 .
- Minotti , P. L. , Halseth , D. E. and Sieczka , J. B. 1994 . Field Chlorophyll Measurements to Assess the Nitrogen Status of Potato Varieties. . HortScience , 29 : 1497 – 1500 .
- Sandoval-Villa , M. , Guertal , E. A. and Wood , C. W. 2000 . Tomato Leaf Chlorophyll Meter Readings as Affected by Variety, Nitrogen Form, and Nighttime Nutrient Solution Strength. . J. Plant Nutr. , 23 : 649 – 661 .
- Peterson , T. A. , Blackmer , T. A. , Francis , D. D. and Schepers , J. S. 1993 . Using a Chlorophyll Meter to Improve N Management Lincoln, NE : Univ. of Neb. . Coop. Ext. G93-1171-A;
- Nelson , D. W. and Sommers , L. E. 1980 . Total Nitrogen Analysis of Soil and Plant Tissues. . J. Assn. Offc. Anal. Chem. , 63 : 770 – 778 .
- Swiader , J. M. and Al-Redhaiman , K. 1999 . Petiole-Sap Nitrate Response and Sufficiency Ranges in Dryland and Sprinkler-Fertigated Pumpkins. . J. Veg. Crop Prod. , 4 : 45 – 56 .