Crop growth stage

A description of the trial area, which includes a layout of the plots, the previous history of the trial area, a description of the plots, special local features, and the ownership of the land, should be recorded. Increasingly, digital photography is used to document site location, type of application used, crop growth stage, etc. 

The influence of application of Idaho phosphate fertilizer on pH and cadntium availability index (CAl) of the bulk and rhizosphere soils collected at 2- and 7-week crop growth stages. Modified from Krishnamurti et al. (1996)... 

Crop/variety and crop growth stage. Some herbicides are only reconunended for use on a limited range of crops, e.g. phenmedipham on beet and strawberry crops only, whereas triallate is recommended for wild oat control on a wide range of crops. Other herbicides are only recommended for use on some varieties of crops as there can be problems with crop damage, i.e. metribuzin in potatoes. 

A detailed description of the test system (crop) should be given in the study plan. Information on the growth stage and development of the crop (especially for the period... 

Timing applications should be made at the time of the year and plant growth stage where potential worker exposure would be at a maximum. It is critical to have a mature crop because exposure will be increased owing to the larger surface area of the foliage compared with that of an immature crop. 

Proper understanding of allelopathic crop and weed plants including their growth stages at which toxin production occurs and characterization of allelopathic agents frcm these plants provide new avenues for developing technologies in weed control, crop efficiency, pest control and plant diseases. 

Growth stage of cash crop when weeding is considered necessary Optional weed management methods... 

As decomposers, fungi play an important role in soil formation, but they can also harm crops. Most of the harm they cause occurs during a plant s early growth stages. Fungi can also spoil stored food and are particularly devastating to the world s fruit harvest. 

These are the more or less straightforward cases, but there can be more contentious ones. In a field study, the exact date of the application of the test item can in most cases not be predicted with sufficient accuracy, since the time point of application depends on a good number of variables that cannot be influenced by the Study Director or the Principal Investigator, such as weather conditions and growth stage of the crop to be treated. It is therefore customary for field studies not to specify an exact date for the spraying of the crop, but to... 

Waiting for Crop Reaching Appropriate Growth Stage... 

Table 3.3 Spray deposition (% dose) on the soil surface underneath a cereal crop (wheat or barley) for different growth stages (Zadoks et al., 1974 and different spray...

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