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Elias A. Moura, Pollyana C. Chagas, Edvan A. Chagas, Railin R. Oliveira, Raphael H. Siqueira, Daniel L.L. Taveira, Wellington F. Araújo, Maria R. Araújo and Maria L. Grigio

(measured in kilograms per plant); yield (measured in megagrams per hectare); fruit diameter and length (measured in millimeters); fruit, bark, pulp, and seed weight (measured in grams); firmness (measured in Newtons); soluble solids (measured in degrees

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Sohrab Davarpanah, Ali Tehranifar, Gholamhossein Davarynejad, Mehdi Aran, Javier Abadía and Reza Khorassani

). Plant nutrition is crucial for agriculture production and crop quality, and ≈40% to 60% of the total world food production depends on the application of fertilizers. The average yields of some cereal crops in the United States, including maize, rice

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Ralph Scorza and Margaret Pooler

Doubled haploid peach [Prunus persica (L.) Batsch] lines were cross-pollinated to produce F1 hybrids. F1 hybrids were evaluated at 3, 7, 8, and 9 years after field planting for tree growth as measured by trunk cross-sectional area, and for fruit production as measured by total weight, total number, and production per unit trunk cross-sectional area. Fruit quality of most F1 hybrids was within the range of quality observed in progeny of standard peach cultivars, and tree growth and productivity were similar to those of standard cultivars. F1 hybrids present the possibility of developing scion varieties that can be produced from seed, thus eliminating the need for grafting scions onto rootstocks in situations where specific, adapted rootstocks are not necessary. They could also be used to develop genetically uniform seed-propagated rootstocks. The use of doubled haploid-derived F1 peach hybrids, however, would require reliable, efficient production techniques.

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William B. Thompson, Jonathan R. Schultheis, Sushila Chaudhari, David W. Monks, Katherine M. Jennings and Garry L. Grabow

percentage of no. 1 grade sweetpotato roots that result in excellent economic return. For improved storage root yield and quality, growers must closely follow recommended growing practices in the production field ( Kemble, 2013 ). However, production

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Francisco Doñas-Uclés, Diego Pérez-Madrid, Celia Amate-Llobregat, Enrique M. Rodríguez-García and Francisco Camacho-Ferre

., 2010 ), as with the case of cucurbits, the main family of grafted plants worldwide ( Cohen et al., 2007 ). In spite of the fact that the use of the adequate rootstock through grafting can be an alternative strategy to avoid or reduce yield losses caused

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Tadahisa Higashide, Yuya Mochizuki, Takeshi Saito, Yasushi Kawasaki, Dong-Hyuk Ahn and Akio Ohyama

Yields of greenhouse tomatoes ( Solanum lycopersicum L.) in the Netherlands have doubled over the past 30 years ( KIG, 2005 ), whereas those in Japan have not increased since the 1980s, remaining much less than ≈30 kg·m −2 per year. Although the

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David M. Eissenstat, Denise Neilsen, Gerry H. Neilsen and Thomas S. Adams

, Canada. Investigations included root growth, shoot water relations, tree branch growth, and fruit yield. We hypothesized that restricted irrigation would increase root growth in the irrigated portion of the soil, and reduce aboveground vegetative growth

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M. Joseph Stephens, Peter A. Alspach, Ron A. Beatson, Chris Winefield and Emily J. Buck

Genetic improvement for fruit yield remains a key breeding objective in raspberry breeding programs worldwide. High-yielding raspberry cultivars with good fruit quality characteristics and pest and disease resistance are most important in

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Xinhua Yin, Jinhe Bai and Clark F. Seavert

The mid-Columbia region in Oregon produces 40% of the “winter” pears and 20% of the ‘Bartlett’ “summer” pears in the United States. Pear production is highly dependent on nitrogen (N) and phosphorus (P) fertilization to achieve optimum fruit yield

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Bruce D. Lampinen, Vasu Udompetaikul, Gregory T. Browne, Samuel G. Metcalf, William L. Stewart, Loreto Contador, Claudia Negrón and Shrini K. Upadhyaya

with mechanically harvested yield data. Materials and methods Mobile platform description. To measure PAR intercepted by the plant canopy, a utility vehicle (model 610 Mule; Kawasaki Heavy Industries, Tokyo) was fitted with a PAR measurement system