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Fluid Journal : Fluid Journal 1996-1998
1 Fluid Journal Fall 1995 roducers have observed that dry beans planted early in cool soils do not always mature earlier, and often yield less than beans planted in warm soils (60 to 70°F). The question thus arose: can starter fertilizers, which are not widely used, overcome some effects of early planting by improving early growth? Because early fall frosts and cool summers of recent years have resulted in significant crop losses, attention has been focused on practices that might promote earlier maturity. At our Research and Extension Center at Powell, Wyoming, we initiated studies to: 1) determine optimum planting time for dry beans, and 2) determine the potential of starter fertilizers to improve early growth and yield as well as hasten by Dr. Alan D. Blaylock P Star Star Star Star Starters Bump Y ters Bump Y ters Bump Y ters Bump Y tersBump Yields In Edible Bean ields In Edible Bean ields In Edible Be an ields In Edible Be an ields In Edible Be an Countr Countr Countr Countr Countryyyyy Wyoming researcher studies yield responses to variables in fertilizer applications and planting date. Summary: In northern regions, reduced nutrient availability may slow early growth of early-planted dry edible beans (Phaseolus vulgaris L.). In a study conducted at Powell, Wyoming, to determine optimum planting time for these dry beans and the potential of nutrients to improve growth and yield, starter fertilizers significantly improved early growth. Yields averaged 250 to 300 lbs/A greater with N-P-Zn starter than with control treatments. Yields were greatest for late planting in 1994 and greatest for early planting in 1995. Response to starters was consistent among planting dates. Later plantings matured more quickly than early plantings, but more rapid maturity rate did not make up for planting delay. maturity of early-planted dry beans. Planting date Weather effects. In 1994, warm, dry summer weather resulted in conditions generally favorable for bean production. Warm weather in September and unusually late frost allowed all plants (regardless of planting date) to completely mature. Yields were good to excellent for the area. In 1995, weather conditions during planting in mid and late May were cool and wet. Emergence was delayed, and average plant populations were less than in 1994 (69,000 vs. 99,000 plants/A). Table 1. Fertilizer treatments for study at Powell, WY. Treatment N P Zn Formulation Control 000 N (banded) 20 0 0 32-0-0 N-P (banded) 20 20 0 10-34-0 + 32-0-0 N-P-Zn (banded) 20 20 1 10-34-0 + 13-0-0-15Zn1 + 32-0-0 N-P-Zn (broadcast) 20 20 1 34-0-0 + 0-46-0 + ZnSO4 (35.5% Zn) 1 Ammoniated Zn-ammine complex Yield - lbs/A Bill Z. Midland 3,400 2,200 May 10 May 20 May 31 June 10 Planting Date 2,400 2,600 2,800 3,000 3,200 Figure 1. Dry bean yield response to planting date at Powell, WY, 1994.
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