|Statement||F.J. Veihmeyer, A.H. Holland|
|Series||Bulletin -- no. 711, Bulletin (California Agricultural Experiment Station) -- 711.|
|Contributions||Holland, A. H. (Albert H.)|
|The Physical Object|
|Pagination||51 p. :|
|Number of Pages||51|
irrigation efficiency. With the drip irrigation systems, water and nutrients can be applied directly to the crop at the root level, having positive effects on yield and water savings and increasing the irrigation performance (Nagaz et al., ). Lettuce (Lactuca sativa L.) is the herbaceous plant that belongs to the Asteraceaes family. evaluated the energy consumption in hydroponic lettuce production system (Regina cv.) with three intervals between irrigations (15, 30 and 45 minutes) and they did not find the significant effect of these irrigation intervals on the leaf area of this crop. In addition to adapting to high temperatures and cultivation. An adequate irrigation schedule is necessary to optimize water-use efficiency, prevent nutrient leaching and maintain optimal growing conditions in soil-bound lettuce production. As Flemish growers base their strategy mainly on experience and basic soil sampling, the implementation of a decision support system (DSS) could improve their. The field is generally maintained in a flooded condition until the lettuce has uniformly emerged. The second irrigation stage involves furrow irrigation for crop maintenance following stand establishment. Usually an irrigation is made to soften the soil prior to thinning and cultivation.
Lettuce is grown mainly in areas having cool summers and mild winters. In large-scale Lettuce, cultivation is done without soil with help of hydroponic technique or in protective cultivation. Seed Rate: Lettuce seeds are very thin and delicate. Approximately grams required for one-hectare Lettuce cultivation.5/5. Irrigation is a fundamental factor in lettuce cultivation. It must be applied with precision and within values that cannot be exceeded by default or excess. With a water deficit lettuce can enter a vegetative stop, develop necrosis at the edges and increase the incidence of botritis. lettuce, loose-leaf lettuce and romaine or cos lettuce. Production Trends The Food and Agriculture (FAO) of the United Nations (UN) estimates that total global commercial production of lettuce was million metric tons (mmt) in , harvested from million hectares. China led production with mmt, just over half the world ˇs total. Transplants should be planted near the last frost-free date for the growing area. Seeded lettuce may be planted 2 to 3 weeks earlier. For either seeded or transplanted lettuce, have 12 to 15 inches between each row. Leaf lettuce: Plant 4 inches apart. Cos and loose-headed types: Plant 8 inches apart. Firm-headed types: Plant 16 inches apart.
Yield in Lettuce Cultivation: Yield of any vegetable crop depends on many factors like soil type, cultivar (variety), irrigation, climate and other farm management practices. On an average, one can obtain head lettuce ab to 12, kg per 1 hectare land. Lettuce can be harvested in 60 to 70 days from planting. Lettuce grown for home use can be harvested when plants are big enough for use. Aphids are the primary pests of lettuce. The most common diseases of lettuce are Bottom Rot, Gray Mold Rot, Brown Blight and . For a good harvest and yield, lettuce needs constant water during hot climate. Soils must contain moisture uniformly. Depending on weather and climatic conditions irrigation must be provided. Drip irrigation is recommended for growing lettuce crop. Consult extension publication AG, Production of Commercial Vegetable Transplants. Irrigation -- Irrigate to establish a stand and to keep the crop growing. Irrigation to cool crop for early fall plantings is important. Cultivation -- Lettuce is shallow rooted, and shallow cultivation (11/2 inches or less) is all that is necessary.