Posts Tagged: Spinach
Drip irrigation continues to yield benefits
Considered among the most important agricultural innovations in the world, drip irrigation has been researched for decades. UC Cooperative Extension weed management advisor Aliasghar Montazar has taken a close look at its application in organic spinach cultivation, reported Matthew Grassi in Growing Produce.
Not only does drip irrigation use less water than irrigation with sprinklers, the slow emission of water near plant roots also diminishes the crops' susceptibility to disease. Growers believe that ongoing issues with downy mildew is at least partially caused by moisture that sprinklers leave in the plant canopy.
“Being certified organic, there is really nothing they can use as fungicide; so it is a big problem,” Montazar said. “So, we said ‘Let's try drip (irrigation) in spinach.'”
Early results are promising. Montazar has analyzed enough field data from the plots to directly correlate a four- to five-times reduction in downy mildew disease in plots grown with drip irrigation compared to sprinkler-irrigated plots.
“The other thing to note is there is a nice savings on energy as well,” Montazar said. “Another grower reported he saved $200 an acre on energy savings from getting off the sprinklers. Because with drip, there is less pressure needed, so it consumes less energy (to pump water).”
Weed control strategies for fresh market spinach
Spinach is susceptible to weed pressure because it is produced on high-density 80-inch wide beds...
Table 1
Table 2
Photo 1. 2.0 pints/A Spin-Aid morning application (note burn on tips of cotyledons)
Photo 2. 2.0 pints/A Spin-Aid evening application
Photo 3. Stunted malva in Spin-Aid treated plot
Photo 4. Healthy malva in untreated plot
Cost estimates for growing romaine hearts and organic spinach released
Sample costs to produce and harvest romaine hearts and organic spinach in the Central Coast Region – Monterey, Santa Cruz and San Benito counties – are presented in these studies.
The analysis is based upon a hypothetical farm operation of a well-managed farm, using practices common to the region. Input and reviews were provided by growers, UC ANR Cooperative Extension farm advisors and other agricultural associates. Assumptions used to identify current costs for these crops, material inputs, cash and non-cash overhead are described. A ranging analysis table shows profits over a range of prices and yields. Other tables show the monthly cash costs, the costs and returns per acre, hourly equipment costs, and the whole farm annual equipment, investment and business overhead costs.
These two studies can be downloaded for free from the UC Davis Department of Agriculture and Resource Economics website at http://coststudies.ucdavis.edu. Cost-of-production studies for many commodities are also available.
For additional information or an explanation of the calculations used in the studies, contact Don Stewart at the UC ANR Agricultural Issues Center at (530) 752-4651 or destewart@ucdavis.edu.
UC Cooperative Extension advisors help spinach growers finesse fertilizer applications
Richard Smith and Michael Cahn, UCCE advisors for Monterey and other Central Coast counties, have been conducting field trials for several years to determine volume data on fertilizer application. Once growers know exactly how much nitrogen their crop is absorbing, they can more precisely apply an appropriate amount.
Smith explained that baby spinach will absorb roughly 80 percent of the nitrogen it is going to take up in the final two weeks before harvest, making timing critical, Taylor reported. Spinach harvested a few days later, called "teen spinach" uses about 100 pounds of nitrogen per acre; larger-leafed spinach can used up to 120 pounds.
“No (previous) studies had evaluated high-density planting of clipped or bunched spinach grown on 80-inch beds,” said UCCE research assistant Aaron Heinrich. “Our study was specifically designed to provide data on the nitrogen uptake characteristics of spinach and to evaluate ways to improve nitrogen fertilizer management.”
Exotic Perennial Vegetables of the Month: Yacon and Malabar Spinach
When gardeners speak of “perennial vegetables,” the edible plants that often come to mind include asparagus, rhubarb, and artichoke. The purpose of this article is to introduce you to other rare and/or unusual perennial vegetables which may be worth cultivating in your own backyard garden.
My quest for rare and unusual perennial vegetables led me to a plant sale recently held at the Occidental Arts & Ecology Center in Occidental, California (see www.oaec.org for more information). Although I purchased a number of perennial vegetables at the sale, most of which I have no experience growing, this article will feature two of those plants, which seem to be thriving thus far in my Solano County backyard garden. I will report back on other weird and wonderful perennial vegetables in the coming months, depending on how well they fare.
I had been searching for yacon (Polymnia sonchifolia), also known as Bolivian Sunroot, for quite some time, and was thrilled to have found it at the OAEC plant sale. Yacon is considered one of the “Lost Crops of the Incas.” Yacon is a relative of the sunflower and and native to the high Andes. Although my yacon plant is currently 5 inches tall, the literature I have read indicates that my yacon plant should reach 5-feet tall at maturity. To harvest yacon, the tubers are dug up in the autumn (so I have another a year to wait). Yacon is a versatile plant, as it can be eaten raw like fruit, or can be stir-fried, roasted, baked or made into pies and chips. Some cultures use the leaves of the yacon plant with which to wrap their food. Although I have never tasted yacon as it is not readily available in the markets that I shop at, I have read that yacon tastes like jicama, only better. Another description that I found, said that yacon tastes like a cross between celery and a Granny Smith apple. Yacon is best grown in full sun and in well-drained, fertile soil.
In recent years, yacon has grown in popularity, both in gardening literature and in nurseries specializing in rare plants. This may be due to the fact that yacon is an up and coming “super food,” as food companies are developing yacon into various products such as yacon syrup, which is a low-calorie sugar substitute appealing to both diabetics and people on diets.
Although I debated whether to buy malabar spinach (Basella rubra) at the OAEC plant sale, I gave in, as I knew malabar spinach to be a staple for those interested in permaculture/creating an edible food forest in their backyards. It is not actually spinach, but has the flavor of spinach, and can be substituted in recipes which call for spinach (note that malabar spinach is fleshy and mucilaginous, and is best consumed cooked and not raw). Under the right conditions (e.g., full sun, and fertile, well-drained soil), malabar spinach which is a vine requiring trellising, can reach 8-10 feet in length. Because malabar spinach is so prolific, I have read that one vine is sufficient to feed a family of 4. Malabar spinach is frost tender and may need to be dug up and brought indoors during the winter.
I will report on other unusual perennials growing in my backyard in the coming months, so stay tuned for updates.
Malabar spinach. (photos by Betty Homer)
Yacon