Communications in Soil Science and Plant Analysis, May 1, 1988
The acidity of alfisols and ultisols may be unfavorably increased for blueberry production by the... more The acidity of alfisols and ultisols may be unfavorably increased for blueberry production by the use of specific nitrogen (N) fertilizers. Several ammonium containing fertilizers were evaluated for their effects on rabbiteye blueberries (Vaccinium ashei Reade). Rooted ‘Tifblue’ cuttings were grown in a 1: 1 peat: Lilbert loamy fine sand mix for 90 days. After establishment, plants were moved into
Journal of the American Society for Horticultural Science
of the plant-parasitic nematode Pratylenchus penetrans. Pennsylvania State Univ. Bui. 815. Mai, W... more of the plant-parasitic nematode Pratylenchus penetrans. Pennsylvania State Univ. Bui. 815. Mai, W.F. and K.G. Parker. 1972. Root diseases of fruit trees in New York State: IV. Influence of preplant treatment with a nematicide, charcoal from burned brush, and complete mineral nutrition on growth and yields of sour cherry trees and numbers of Pratylenchus penetrans.
Commercial production of cranberries (Vaccinum macrocarpon L.) requires annual fertilizer inputs.... more Commercial production of cranberries (Vaccinum macrocarpon L.) requires annual fertilizer inputs. However, over supply of nitrogen (N) can lead to an abundance of vegetative production at the expense of fruit production. In the North American Pacific Northwest, a high percentage of cranberry production is on organic soils. On these soils, there is a range of situations where plants on some fields can tolerate N applications whereas on other fields any application of N leads to a reduction in crop yield and fruit quality. This project was initiated to evaluate the N mineralization and nitrification potential of both undisturbed (virgin) organic soils and organic soils that have been under intensive cranberry production for at least 20 years. The virgin soils characteristically maintain high soil moisture contents and higher % organic carbon. The total amount of mineral N (nitrate and ammonium) generated in cultivated and virgin soils did not differ over the duration of this study. Mineral N in cultivated soils was predominantly in the nitrate form whereas in the virgin soils ammonium N was dominant.
Journal of the American Society for Horticultural Science
Limbs of ‘Bing’ cherries (Prunus avium L.) were shaded with neutral density shade structures to r... more Limbs of ‘Bing’ cherries (Prunus avium L.) were shaded with neutral density shade structures to reduce light levels to 10–15% full sun. Three placement times were used: a) petal fall to pit hardening (PF-PH), b) pit hardening to harvest (PH-H), and c) petal fall to harvest (PF-H). Shaded limbs had reduced fruit set, and fruit color and soluble solids were less in comparison to fruit from unshaded limbs. Fruit from shaded limbs were smaller than unshaded for the first 2 harvests, but for the last 2 harvest dates, fruit shaded from PF-PH or PF-H were larger. The time to reach dark red maturity was delayed 5 days by shading from PF-PH or PH-H and 12 days by shading from PF-H. When compared at equal color maturities, fruit from unshaded limbs were firmer than those from shaded limbs. In a study using natural shade, the relationship of fruit color and soluble solids to the percentage of full sun (FS) was logarithmic, with both variables dramatically reduced at light levels below 10–15% F...
Communications in Soil Science and Plant Analysis, May 1, 1988
The acidity of alfisols and ultisols may be unfavorably increased for blueberry production by the... more The acidity of alfisols and ultisols may be unfavorably increased for blueberry production by the use of specific nitrogen (N) fertilizers. Several ammonium containing fertilizers were evaluated for their effects on rabbiteye blueberries (Vaccinium ashei Reade). Rooted ‘Tifblue’ cuttings were grown in a 1: 1 peat: Lilbert loamy fine sand mix for 90 days. After establishment, plants were moved into
Journal of the American Society for Horticultural Science
of the plant-parasitic nematode Pratylenchus penetrans. Pennsylvania State Univ. Bui. 815. Mai, W... more of the plant-parasitic nematode Pratylenchus penetrans. Pennsylvania State Univ. Bui. 815. Mai, W.F. and K.G. Parker. 1972. Root diseases of fruit trees in New York State: IV. Influence of preplant treatment with a nematicide, charcoal from burned brush, and complete mineral nutrition on growth and yields of sour cherry trees and numbers of Pratylenchus penetrans.
Commercial production of cranberries (Vaccinum macrocarpon L.) requires annual fertilizer inputs.... more Commercial production of cranberries (Vaccinum macrocarpon L.) requires annual fertilizer inputs. However, over supply of nitrogen (N) can lead to an abundance of vegetative production at the expense of fruit production. In the North American Pacific Northwest, a high percentage of cranberry production is on organic soils. On these soils, there is a range of situations where plants on some fields can tolerate N applications whereas on other fields any application of N leads to a reduction in crop yield and fruit quality. This project was initiated to evaluate the N mineralization and nitrification potential of both undisturbed (virgin) organic soils and organic soils that have been under intensive cranberry production for at least 20 years. The virgin soils characteristically maintain high soil moisture contents and higher % organic carbon. The total amount of mineral N (nitrate and ammonium) generated in cultivated and virgin soils did not differ over the duration of this study. Mineral N in cultivated soils was predominantly in the nitrate form whereas in the virgin soils ammonium N was dominant.
Journal of the American Society for Horticultural Science
Limbs of ‘Bing’ cherries (Prunus avium L.) were shaded with neutral density shade structures to r... more Limbs of ‘Bing’ cherries (Prunus avium L.) were shaded with neutral density shade structures to reduce light levels to 10–15% full sun. Three placement times were used: a) petal fall to pit hardening (PF-PH), b) pit hardening to harvest (PH-H), and c) petal fall to harvest (PF-H). Shaded limbs had reduced fruit set, and fruit color and soluble solids were less in comparison to fruit from unshaded limbs. Fruit from shaded limbs were smaller than unshaded for the first 2 harvests, but for the last 2 harvest dates, fruit shaded from PF-PH or PF-H were larger. The time to reach dark red maturity was delayed 5 days by shading from PF-PH or PH-H and 12 days by shading from PF-H. When compared at equal color maturities, fruit from unshaded limbs were firmer than those from shaded limbs. In a study using natural shade, the relationship of fruit color and soluble solids to the percentage of full sun (FS) was logarithmic, with both variables dramatically reduced at light levels below 10–15% F...
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