AY Honors/Fruit Growing/Answer Key/es

1

¿Por qué son los árboles frutales injertados?

2

¿Qué quiere decir rusticidad?

Hardiness determines the extent to which a plant or tree can tolerate cold or heat. Normally this is measured in cold such as "plant hardiness to 27 degrees." This means that below 27 degrees the plant will begin to be effected by the cold, starting with freezing of leaves and or fruit.

3

¿Qué lugar y qué condiciones de suelo se necesitan para crecer tres de los siguientes árboles?

a. Manzanas

b. Melocotones

c. Peras

d. Ciruelas

e. Cerezas

f. Naranjas

g. Una elección equivalente que crezca en su área, no mencionada en las anteriores

All of these trees require full sun and well-drained, deeply fertile soil. The hardiness zones and spacing vary depending on the variety of tree. They all require a soil pH between 6.0 and 6.5 except the orange tree which requires a lower pH.

4

¿Qué es un árbol frutal enano? ¿Cómo se convierte en enano?

In horticulture dwarfing is considered a desirable characteristic in modern orchards, where genetic dwarfs may be selected and propagated, or more often, scions are grafted on to dwarfing rootstocks. Almost all modern apples in commercial use are propagated as dwarf or semi-dwarf trees for ease of picking and spraying, and higher productivity per unit of land.

5

Sembrar al menos dos árboles frutales y darles forma podándolos por lo menos dos temporadas, o dar forma y podar un árbol existente. Bajo supervisión, fertilizar según sea necesario para una temporada de crecimiento. Mostrar un ejemplo del producto de la cosecha de frutas a su examinador.

Pruning

In early spring, prune any branches that touch one another. This allows light to penetrate to the center of the tree and will increase its yield. You will, of course, only need to prune one of any two branches that cross. Prune any injured branches, and leave any short branches that are growing from the main trunk (these bear fruit first). In the tree's first five years, prune sparingly, only removing those branches that compete with the branches you want to keep. After the tree is five years old, prune it every year in the late winter. Do not allow crowding. When pruning, always cut the branch off even with its host limb (or trunk). Do not leave stubs.

Fertilizing

Fruit trees should be fertilized in early spring before they bud or sprout leaves. If the soil pH is above 7, use a 21-0-0 fertilizer or ammonium sulfate. If the soil pH is below 7, use a 15-5-10 fertilizer. A general rule of thumb is to use one pound of fertilizer for every inch of trunk diameter. Fertilizer can be spread on the ground around the tree and scratched in with a rake. The fertilizer should be laid down in a ring extending out so that it covers all the ground beneath the tree's branches. The inner portion of the ring should extend to within about one foot (30 cm) of the trunk.

Spraying

Spray trees with fruit tree spray when the flower petals begin to fall off and repeat every ten days until they are ready to harvest. Do not wait for insects to invade, but rather, keep them at bay before they get a foothold. In early spring while the tree is still dormant, you should spray it with dormant oil. Dormant oil is a highly refined petroleum product which is diluted with water prior to spraying. It suffocates scale insect, spider, and mite eggs that may have overwintered in the tree.

6

Responder las siguientes preguntas:

6a

¿Qué es la polinización?

For plants pollen is what causes reproduction. Some plants are either strictly male or strictly female while others have features of both sexes and can self pollinate successfully. Pollination is the transmission of pollen from one plant bud to another.

6b

¿Qué es un polinizador?

A pollinator is the object be it an insect, bug, animal or weather that transmits pollen from one plant to another. Bees and humming birds are the two most well known pollinators.

6c

¿Qué árboles necesitan un polinizador?

Nut trees such as pecans and almonds require a pollinator, but most others can benefit from them as well.

7

¿Cómo se protegen los árboles jóvenes de los daños de roedores? Proteger sus árboles jóvenes de los roedores.

Rodents, especially voles, tend to feed on tree bark when other sources of food are exhausted or difficult to come by. Sometimes they will eat a band of bark encircling the trunk of the tree, and if this happens, the tree will die.

This can be prevented by wrapping wire mesh around the base of the tree. The mesh should have openings between an eighth and a quarter inch (3 - 6 mm). It should extend 30 inches (75 cm) above the ground, and 3 inches (7.5 cm) below the ground.

It also helps to pick up dropped fruit and mow around the trees during the summer, so that rodents are not attracted to the orchard.

8

Comparar las cualidades de sabor, textura y la apariencia de dos diferentes variedades de la misma fruta.

You can use any fruit for this, but it is probably easiest to find multiple varieties of apples. Apples are available in many countries all year round. If you are teaching this honor to a group, buy one apple per person, getting as many varieties as you can. Then cut each apple into slices, and place them on plates. Label each plate with the name of the apple variety it holds. Then have a taste testing party.

References

Wikipedia articles:

• Dwarfing
• Grafting

Other Sources:

• http://web.extension.uiuc.edu/state/newsdetail.cfm?NewsID=4885
• Gurney's Seed & Nursery Co. Grow It Guide