Potatoes crop rotation

Three or four years is the usual recommended minimum for a crop rotation, but it can certainly be longer. If you know that your soil has a serious, persistent problem, such as potato cyst nematode, onion white rot, or clubroot, you may need a much longer rotation to grow susceptible crops with any success. 

In an outdoor crop rotation, they can be included In potato or brassica beds, or given their own section. 

In other word, kuth cultivation is more profitable than that cultivation of manu in the cold desert of the Lahaul valley. Though, kuth and manu are harvested after three years, their monetary efficiency was more than cumulative monetary efficiency of HYVs of potato, pea and potato or pea, potato, pea as per then prevalent crop rotations in the recent past. The monetary efficiency of 7.5 estimated during present study for kuth is quiet lower than 11.8 monetary efficiency of kuth in 1995-96 (Kuniyal et al., 2004). Lower market rates of roots and increase in market rates of input are the main reasons for the lower monetary efficiency in the present. 

Their most important application besides their use in maize culture is weed control in cereals, sugar cane, cotton, banana, pineapple, potato, sunflower and vegetable crops. Owing to their low persistence, which is favourable for crop rotation, their use is quickly becoming more widespread than the chloroamine triazines. 

The main reason for this rotation method is to avoid the build-up of pests and diseases, which attack plants that are botanically related. Crop rotation also helps to keep a balance of nutrients in the soil—legumes, for example, release nitrogen into the soil and so are good crops to grow before brassicas, which need high levels of nitrogen. The rotation system also helps to control weeds some crops, such as pumpkins and potatoes, have lots of leafy cover that suppresses weeds others, such as carrots, allow weeds to germinate easily. 

Northern Ireland and the hill areas of England and Wales where substantial seed potato enterprises still continue. The main advantages of these areas ate that the low temperatiues and strong winds keep aphid populations in check. This means that the severe virus diseases (leaf roll and the mosaics) which are spread from diseased to healthy plants by aphids, are less likely to occur. However, recent advances in aphid control and concerns over the quality of seed from some traditional areas have seen successful seed production extended to some of the English arable areas as a profitable break in predominantly cereal and break crop rotations. As with other forms of seed production the certifying authority in England and Wales is FERA, for Scotland SASA (Science and Advice for Scottish Agriculture) and DARD in Northern Ireland. In all cases the same basic Seed Potato Classification Scheme (SPCS) obtains. 

Principal staple crops rotated at these farms were rice, wheat, and corn other crops included rapeseed, broad beans, peas, soybeans, peanuts, sweet potatoes, and green manures, with a multicropping index between 1.7 and 2. 

Legumes thrive in well-drained but moisture-retentive soil that has been fed for a previous crop, such as potatoes. In a rotation they can... 

Morgan and Lenz (1992) showed that the major water-soluble metabolite in wheat grain was 2-amino-3,3-dime-thyl butanoic acid (Figure 7.19). This material accounted for 11% of the total radioactive residue. Degradation of the heterocyclic ring to form the semicarbazone of pyruvic acid was reported in a potato rotational crop study by Prestel et al (1976). However, Scholz (1982) was unable to repeat this observation. 

Prevention and Control Clean up plant debris to remove overwintering sites. Use disease-free seeds and seed potatoes. Rotate crops and plant resistant cultivars. Preventive copper-based fungicide sprays may help reduce the spread of early blight. Remove and destroy severely infected plants. 

Prevention and Control The fungus that causes potato late blight overwinters on diseased tubers. Harvesting all tubers and disposing of. those that are infected limit the disease the following season. Rotate crops and select resistant cultivars. Plant only certified disease-free seed potatoes. 

Prevention and Control Scab fungi thrive in light, sandy soils with a neutral or alkaline pH. Lowering the soil pH to below 5.2 will reduce the chance of disease. Start with certified disease-free seed potatoes. Rotate crops and plant resistant cultivars. Keep the soil evenly moist. 

Certain soilborne diseases attack a broad spectrum of crops, and a more complex rotation is necessary to prevent infection. For example, the hactenum Pseudomonas margi-nalis can cause rots of lettuce, beans, cucumbers, and potatoes. If your garden is home to this disease organism, you may have to make it the sole focus of your rotation. Separate the susceptible crops by as much time as possible within your rotation. 

Rotations. Growing leys and various arable crops that ate planted at different times of the year usually leads to a different weed flora. There is also an opportunity to use different types or groups of herbicides. This method is useful if there are difficult weeds such as barren brome, volunteer potatoes, herbicide resistant black-grass and weed beet to control. 

Rotary sprinklers. Each rotating sprinkler covers an area about 21-36 m in diameter. The sprinklers are usttally spaced 10.5 m apart along the supply line which is moved about 18 m for each setting. Special nozzles can be used to apply a fine spray at 2.5 mm per hotrr for frost protection of fruit crops and potatoes. Icicles form on the plants, bnt the latent heat of freezing protects the plant tissne from damage. 

Volimteer potatoes from tubers and seed are an increasing problem, particularly in close rotations. Glyphosate, pre-harvest in other arable crops, can aid control. 

A rotation of one crop in five years is preferable to avoid disease. Sugar beet and potatoes host violet root rot. 

Rotations including linseed, lucerne, flax, hops, peas, runner beans or potatoes should be avoided as these may increase levels of Verticillium. Care is also needed in the use of residual herbicides in preceding crops. 

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